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Lina Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Unique Stress Whitening and High-Toughness Double-Cross-Linked Cellulose Films
    ACS Sustainable Chemistry & Engineering, 2018
    Co-Authors: Junchao Huang, Ying Lu, Yi Zhong, Lina Zhang
    Abstract:

    Polysaccharide-based materials, which have the advantages of abundant reserves and excellent biocompatibility and biodegradability, have attracted growing interest due to public awareness of sustainable development. Herein, we demonstrate the formation of high-strength and high-toughness double-cross-linked (DC) Cellulose Films. For the first time, stress whitening of DC Cellulose Films is reported, which has never been observed in Cellulose-based Films or other polysaccharide-based materials. The epichlorohydrin-to-anhydroglucose unit of Cellulose (ECH-to-AGU) molar ratio, ethanol concentration, and relative humidity are critical parameters that influence the microstructure and stress whitening of DC Cellulose Films. Moreover, the incorporation of chemically and physically cross-linked heterogeneous structures, strong hydrogen bonding, and irreversible chemical covalent interactions among Cellulose chains endows DC Cellulose Films with excellent mechanical properties and superior toughness. The drawing o...

  • transparent Cellulose Films with high gas barrier properties fabricated from aqueous alkali urea solutions
    Biomacromolecules, 2011
    Co-Authors: Quanling Yang, Hayaka Fukuzumi, Tsuguyuki Saito, Akira Isogai, Lina Zhang
    Abstract:

    Transparent and bendable regenerated Cellulose Films prepared from aqueous alkali (NaOH or LiOH)/urea (AU) solutions exhibit high oxygen barrier properties, which are superior to those of conventional cellophane, poly(vinylidene chloride), and poly(vinyl alcohol). Series of AU Cellulose Films are prepared from different Cellulose sources (cotton linters, microcrystalline Cellulose powder, and softwood bleached kraft pulp) for different dissolution and regeneration conditions. The oxygen permeabilities of these AU Cellulose Films vary widely from 0.003 to 0.03 mL μm m–2 day–1 kPa–1 at 0% relative humidity depending on the conditions used to prepare the Films. The lowest oxygen permeability is achieved for the AU film prepared from 6 wt % Cellulose solution by regeneration with acetone at 0 °C. The oxygen permeabilities of the AU Cellulose Films are negatively correlated with their densities, and AU Films prepared from solutions with high Cellulose concentrations by regeneration in a solvent at low temperat...

  • Transparent Cellulose Films with High Gas Barrier Properties Fabricated from Aqueous Alkali/Urea Solutions
    Biomacromolecules, 2011
    Co-Authors: Quanling Yang, Hayaka Fukuzumi, Tsuguyuki Saito, Akira Isogai, Lina Zhang
    Abstract:

    Transparent and bendable regenerated Cellulose Films prepared from aqueous alkali (NaOH or LiOH)/urea (AU) solutions exhibit high oxygen barrier properties, which are superior to those of conventional cellophane, poly(vinylidene chloride), and poly(vinyl alcohol). Series of AU Cellulose Films are prepared from different Cellulose sources (cotton linters, microcrystalline Cellulose powder, and softwood bleached kraft pulp) for different dissolution and regeneration conditions. The oxygen permeabilities of these AU Cellulose Films vary widely from 0.003 to 0.03 mL μm m–2 day–1 kPa–1 at 0% relative humidity depending on the conditions used to prepare the Films. The lowest oxygen permeability is achieved for the AU film prepared from 6 wt % Cellulose solution by regeneration with acetone at 0 °C. The oxygen permeabilities of the AU Cellulose Films are negatively correlated with their densities, and AU Films prepared from solutions with high Cellulose concentrations by regeneration in a solvent at low temperat...

  • Properties of Cellulose Films prepared from NaOH/urea/zincate aqueous solution at low temperature
    Cellulose, 2011
    Co-Authors: Quanling Yang, Lina Zhang
    Abstract:

    Cellulose Films were successfully prepared from NaOH/urea/zincate aqueous solution pre-cooled to −13 °C by coagulating with 5% H2SO4. The Cellulose solution and regenerated Cellulose Films were characterized with dynamic rheology, ultraviolet–visible spectroscope, scanning electron microscopy, wide angle X-ray diffraction, Fourier transform infrared (FT-IR) spectrometer, thermogravimetry and tensile testing. The results indicated that at higher temperature (above 65 °C) or lower temperature (below −10 °C) or for longer storage time, gels could form in the Cellulose dope. However, the Cellulose solution remained a liquid state for a long time at 0–10 °C. Moreover, there was an irreversible gelation in the Cellulose solution system. The Films with Cellulose II exhibited better optical transmittance, high thermal stability and tensile strength than that prepared by NaOH/urea aqueous solution without zincate. Therefore, the addition of zincate in the NaOH/urea aqueous system could enhance the Cellulose solubility and improve the structure and properties of the regenerated Cellulose Films.

  • Transparent Cellulose Films with high gas barrier properties fabricated from aqueous alkali/urea solutions
    Biomacromolecules, 2011
    Co-Authors: Quanling Yang, Hayaka Fukuzumi, Tsuguyuki Saito, Akira Isogai, Lina Zhang
    Abstract:

    Transparent and bendable regenerated Cellulose Films prepared from aqueous alkali (NaOH or LiOH)/urea (AU) solutions exhibit high oxygen barrier properties, which are superior to those of conventional cellophane, poly(vinylidene chloride), and poly(vinyl alcohol). Series of AU Cellulose Films are prepared from different Cellulose sources (cotton linters, microcrystalline Cellulose powder, and softwood bleached kraft pulp) for different dissolution and regeneration conditions. The oxygen permeabilities of these AU Cellulose Films vary widely from 0.003 to 0.03 mL μm m(-2) day(-1) kPa(-1) at 0% relative humidity depending on the conditions used to prepare the Films. The lowest oxygen permeability is achieved for the AU film prepared from 6 wt % Cellulose solution by regeneration with acetone at 0 °C. The oxygen permeabilities of the AU Cellulose Films are negatively correlated with their densities, and AU Films prepared from solutions with high Cellulose concentrations by regeneration in a solvent at low temperatures generally have low oxygen permeabilities. The AU Cellulose Films are, therefore, promising biobased packaging materials with high-oxygen barrier properties.

Quanling Yang - One of the best experts on this subject based on the ideXlab platform.

  • Facile fabrication of transparent Cellulose Films with high water repellency and gas barrier properties
    Cellulose, 2012
    Co-Authors: Quanling Yang, Tsuguyuki Saito, Akira Isogai
    Abstract:

    Transparent and water repellent gas barrier Cellulose Films were fabricated by surface modification of alkali/urea regenerated Cellulose (AUC) Films by soaking in cationic alkylketene dimer (AKD) dispersion, drying, and heating. Highly water repellent and excellent gas barrier properties were obtained for AKD-treated and heated AUC Films due to covering of the film surfaces by hydrophobic AKD components. The maximum AKD content of the Films was 0. 2 %. Oxygen transmission rates for AKD-treated AUC Films at 0 % relative humidity (RH) were less than 0. 0005 mL m -2 day -1 kPa -1, the lowest detection limit of the instrument. Water contact angles on the AUC film increased from 50 to 110° after AKD treatment, and water uptake (immersion in water for 6 days) decreased from 92 to 20 %. Moreover, oxygen permeability decreased from 0. 56 and 5. 8 to 0. 13 and 2. 1 mL ?m m -2 day -1 kPa -1 at 50 and 75 % RH, respectively, when the AKD content of the film was increased from 0 to 0. 2 %. The present AKD-treated AUC film also had high light transparency (88 % at 600 nm), tensile strength (168 MPa), elongation at break (29 %), and work of fracture (37 MJ m -3). FT-IR analysis showed that AKD components were still present as major species on the AKD-treated film surfaces without hydrolysis at 2 months after conditioning the Films at 23 °C and 50 % RH, indicating that such AKD molecules contributed to the hydrophobic nature of the AKD-treated AUC Films. © 2012 Springer Science+Business Media Dordrecht.

  • transparent Cellulose Films with high gas barrier properties fabricated from aqueous alkali urea solutions
    Biomacromolecules, 2011
    Co-Authors: Quanling Yang, Hayaka Fukuzumi, Tsuguyuki Saito, Akira Isogai, Lina Zhang
    Abstract:

    Transparent and bendable regenerated Cellulose Films prepared from aqueous alkali (NaOH or LiOH)/urea (AU) solutions exhibit high oxygen barrier properties, which are superior to those of conventional cellophane, poly(vinylidene chloride), and poly(vinyl alcohol). Series of AU Cellulose Films are prepared from different Cellulose sources (cotton linters, microcrystalline Cellulose powder, and softwood bleached kraft pulp) for different dissolution and regeneration conditions. The oxygen permeabilities of these AU Cellulose Films vary widely from 0.003 to 0.03 mL μm m–2 day–1 kPa–1 at 0% relative humidity depending on the conditions used to prepare the Films. The lowest oxygen permeability is achieved for the AU film prepared from 6 wt % Cellulose solution by regeneration with acetone at 0 °C. The oxygen permeabilities of the AU Cellulose Films are negatively correlated with their densities, and AU Films prepared from solutions with high Cellulose concentrations by regeneration in a solvent at low temperat...

  • Transparent Cellulose Films with High Gas Barrier Properties Fabricated from Aqueous Alkali/Urea Solutions
    Biomacromolecules, 2011
    Co-Authors: Quanling Yang, Hayaka Fukuzumi, Tsuguyuki Saito, Akira Isogai, Lina Zhang
    Abstract:

    Transparent and bendable regenerated Cellulose Films prepared from aqueous alkali (NaOH or LiOH)/urea (AU) solutions exhibit high oxygen barrier properties, which are superior to those of conventional cellophane, poly(vinylidene chloride), and poly(vinyl alcohol). Series of AU Cellulose Films are prepared from different Cellulose sources (cotton linters, microcrystalline Cellulose powder, and softwood bleached kraft pulp) for different dissolution and regeneration conditions. The oxygen permeabilities of these AU Cellulose Films vary widely from 0.003 to 0.03 mL μm m–2 day–1 kPa–1 at 0% relative humidity depending on the conditions used to prepare the Films. The lowest oxygen permeability is achieved for the AU film prepared from 6 wt % Cellulose solution by regeneration with acetone at 0 °C. The oxygen permeabilities of the AU Cellulose Films are negatively correlated with their densities, and AU Films prepared from solutions with high Cellulose concentrations by regeneration in a solvent at low temperat...

  • Properties of Cellulose Films prepared from NaOH/urea/zincate aqueous solution at low temperature
    Cellulose, 2011
    Co-Authors: Quanling Yang, Lina Zhang
    Abstract:

    Cellulose Films were successfully prepared from NaOH/urea/zincate aqueous solution pre-cooled to −13 °C by coagulating with 5% H2SO4. The Cellulose solution and regenerated Cellulose Films were characterized with dynamic rheology, ultraviolet–visible spectroscope, scanning electron microscopy, wide angle X-ray diffraction, Fourier transform infrared (FT-IR) spectrometer, thermogravimetry and tensile testing. The results indicated that at higher temperature (above 65 °C) or lower temperature (below −10 °C) or for longer storage time, gels could form in the Cellulose dope. However, the Cellulose solution remained a liquid state for a long time at 0–10 °C. Moreover, there was an irreversible gelation in the Cellulose solution system. The Films with Cellulose II exhibited better optical transmittance, high thermal stability and tensile strength than that prepared by NaOH/urea aqueous solution without zincate. Therefore, the addition of zincate in the NaOH/urea aqueous system could enhance the Cellulose solubility and improve the structure and properties of the regenerated Cellulose Films.

  • Transparent Cellulose Films with high gas barrier properties fabricated from aqueous alkali/urea solutions
    Biomacromolecules, 2011
    Co-Authors: Quanling Yang, Hayaka Fukuzumi, Tsuguyuki Saito, Akira Isogai, Lina Zhang
    Abstract:

    Transparent and bendable regenerated Cellulose Films prepared from aqueous alkali (NaOH or LiOH)/urea (AU) solutions exhibit high oxygen barrier properties, which are superior to those of conventional cellophane, poly(vinylidene chloride), and poly(vinyl alcohol). Series of AU Cellulose Films are prepared from different Cellulose sources (cotton linters, microcrystalline Cellulose powder, and softwood bleached kraft pulp) for different dissolution and regeneration conditions. The oxygen permeabilities of these AU Cellulose Films vary widely from 0.003 to 0.03 mL μm m(-2) day(-1) kPa(-1) at 0% relative humidity depending on the conditions used to prepare the Films. The lowest oxygen permeability is achieved for the AU film prepared from 6 wt % Cellulose solution by regeneration with acetone at 0 °C. The oxygen permeabilities of the AU Cellulose Films are negatively correlated with their densities, and AU Films prepared from solutions with high Cellulose concentrations by regeneration in a solvent at low temperatures generally have low oxygen permeabilities. The AU Cellulose Films are, therefore, promising biobased packaging materials with high-oxygen barrier properties.

Lars Wågberg - One of the best experts on this subject based on the ideXlab platform.

  • nanoscale Cellulose Films with different crystallinities and mesostructures their surface properties and interaction with water
    Langmuir, 2009
    Co-Authors: Christian Aulin, Peter Josefsson, Susanna Ahola, Takashi Nishino, Yasuo Hirose, Monika Osterberg, Lars Wågberg
    Abstract:

    A systematic study of the degree of molecular ordering and swelling of different nanoCellulose model Films has been conducted. Crystalline Cellulose II surfaces were prepared by spin-coating of the precursor Cellulose solutions onto oxidized silicon wafers before regeneration in water or by using the Langmuir−Schaefer (LS) technique. Amorphous Cellulose Films were also prepared by spin-coating of a precursor Cellulose solution onto oxidized silicon wafers. Crystalline Cellulose I surfaces were prepared by spin-coating wafers with aqueous suspensions of sulfate-stabilized Cellulose I nanocrystals and low-charged microfibrillated Cellulose (LC-MFC). In addition, a dispersion of high-charged MFC was used for the buildup of polyelectrolyte multilayers with polyetheyleneimine on silica with the aid of the layer-by-layer (LbL) technique. These preparation methods produced smooth thin Films on the nanometer scale suitable for X-ray diffraction and swelling measurements. The surface morphology and thickness of th...

  • Polyelectrolyte adsorption on thin Cellulose Films studied with reflectometry and quartz crystal microgravimetry with dissipation.
    Biomacromolecules, 2009
    Co-Authors: Lars-erik Enarsson, Lars Wågberg
    Abstract:

    Thin Cellulose Films were prepared by dissolving carboxymethylated Cellulose fibers in N-methyl morpholine oxide and forming thin Films on silicon wafers by spin-coating. The adsorption of cationic polyacrylamides and polydiallyldimethylammonium chloride onto these Films was studied by stagnation point adsorption reflectometry (SPAR) and by quartz crystal microgravimetry with dissipation (QCM-D). The polyelectrolyte adsorption was studied by SPAR as a function of salt concentration, and it was found that the adsorption maximum was located at 1 mM NaCl for polyelectrolytes of low charge density and at 10 mM NaCl for polyelectrolytes of high charge density. Electrostatic screening led to complete elimination of the polyelectrolyte adsorption at salt concentrations of 300 mM NaCl. According to the QCM-D analysis, the Cellulose Films showed a pronounced swelling in water that took several hours to complete. Subsequent adsorption of polyelectrolytes onto the Cellulose Films led to a release of water from the c...

  • The Physical Action of Cellulases Revealed by a Quartz Crystal Microbalance Study Using Ultrathin Cellulose Films and Pure Cellulases
    Biomacromolecules, 2007
    Co-Authors: Peter Josefsson, Gunnar Henriksson, Lars Wågberg
    Abstract:

    The effects of fungal cellulases on model Cellulose Films were studied using a high-resolution quartz crystal microbalance (QCM) sensitive to minute changes of the nanometer thick model Cellulose Films. It was found that endoglucanases not only produce new end groups but also cause a swelling of the Cellulose film. The cellobiohydrolases degraded the Films quickly, which was detected as a rapid decrease in the remaining amount of Cellulose on the QCM crystal. However, changing viscoelastic properties of the Films also indicated a softening of the film during the degradation. A defined mixture of selected cellulases caused a significantly higher rate of degradation than only cellobiohydrolases. Cellulase synergism is discussed with the endoglucanase swelling effects and film softening added.

Akira Isogai - One of the best experts on this subject based on the ideXlab platform.

  • Facile fabrication of transparent Cellulose Films with high water repellency and gas barrier properties
    Cellulose, 2012
    Co-Authors: Quanling Yang, Tsuguyuki Saito, Akira Isogai
    Abstract:

    Transparent and water repellent gas barrier Cellulose Films were fabricated by surface modification of alkali/urea regenerated Cellulose (AUC) Films by soaking in cationic alkylketene dimer (AKD) dispersion, drying, and heating. Highly water repellent and excellent gas barrier properties were obtained for AKD-treated and heated AUC Films due to covering of the film surfaces by hydrophobic AKD components. The maximum AKD content of the Films was 0. 2 %. Oxygen transmission rates for AKD-treated AUC Films at 0 % relative humidity (RH) were less than 0. 0005 mL m -2 day -1 kPa -1, the lowest detection limit of the instrument. Water contact angles on the AUC film increased from 50 to 110° after AKD treatment, and water uptake (immersion in water for 6 days) decreased from 92 to 20 %. Moreover, oxygen permeability decreased from 0. 56 and 5. 8 to 0. 13 and 2. 1 mL ?m m -2 day -1 kPa -1 at 50 and 75 % RH, respectively, when the AKD content of the film was increased from 0 to 0. 2 %. The present AKD-treated AUC film also had high light transparency (88 % at 600 nm), tensile strength (168 MPa), elongation at break (29 %), and work of fracture (37 MJ m -3). FT-IR analysis showed that AKD components were still present as major species on the AKD-treated film surfaces without hydrolysis at 2 months after conditioning the Films at 23 °C and 50 % RH, indicating that such AKD molecules contributed to the hydrophobic nature of the AKD-treated AUC Films. © 2012 Springer Science+Business Media Dordrecht.

  • transparent Cellulose Films with high gas barrier properties fabricated from aqueous alkali urea solutions
    Biomacromolecules, 2011
    Co-Authors: Quanling Yang, Hayaka Fukuzumi, Tsuguyuki Saito, Akira Isogai, Lina Zhang
    Abstract:

    Transparent and bendable regenerated Cellulose Films prepared from aqueous alkali (NaOH or LiOH)/urea (AU) solutions exhibit high oxygen barrier properties, which are superior to those of conventional cellophane, poly(vinylidene chloride), and poly(vinyl alcohol). Series of AU Cellulose Films are prepared from different Cellulose sources (cotton linters, microcrystalline Cellulose powder, and softwood bleached kraft pulp) for different dissolution and regeneration conditions. The oxygen permeabilities of these AU Cellulose Films vary widely from 0.003 to 0.03 mL μm m–2 day–1 kPa–1 at 0% relative humidity depending on the conditions used to prepare the Films. The lowest oxygen permeability is achieved for the AU film prepared from 6 wt % Cellulose solution by regeneration with acetone at 0 °C. The oxygen permeabilities of the AU Cellulose Films are negatively correlated with their densities, and AU Films prepared from solutions with high Cellulose concentrations by regeneration in a solvent at low temperat...

  • Transparent Cellulose Films with High Gas Barrier Properties Fabricated from Aqueous Alkali/Urea Solutions
    Biomacromolecules, 2011
    Co-Authors: Quanling Yang, Hayaka Fukuzumi, Tsuguyuki Saito, Akira Isogai, Lina Zhang
    Abstract:

    Transparent and bendable regenerated Cellulose Films prepared from aqueous alkali (NaOH or LiOH)/urea (AU) solutions exhibit high oxygen barrier properties, which are superior to those of conventional cellophane, poly(vinylidene chloride), and poly(vinyl alcohol). Series of AU Cellulose Films are prepared from different Cellulose sources (cotton linters, microcrystalline Cellulose powder, and softwood bleached kraft pulp) for different dissolution and regeneration conditions. The oxygen permeabilities of these AU Cellulose Films vary widely from 0.003 to 0.03 mL μm m–2 day–1 kPa–1 at 0% relative humidity depending on the conditions used to prepare the Films. The lowest oxygen permeability is achieved for the AU film prepared from 6 wt % Cellulose solution by regeneration with acetone at 0 °C. The oxygen permeabilities of the AU Cellulose Films are negatively correlated with their densities, and AU Films prepared from solutions with high Cellulose concentrations by regeneration in a solvent at low temperat...

  • Transparent Cellulose Films with high gas barrier properties fabricated from aqueous alkali/urea solutions
    Biomacromolecules, 2011
    Co-Authors: Quanling Yang, Hayaka Fukuzumi, Tsuguyuki Saito, Akira Isogai, Lina Zhang
    Abstract:

    Transparent and bendable regenerated Cellulose Films prepared from aqueous alkali (NaOH or LiOH)/urea (AU) solutions exhibit high oxygen barrier properties, which are superior to those of conventional cellophane, poly(vinylidene chloride), and poly(vinyl alcohol). Series of AU Cellulose Films are prepared from different Cellulose sources (cotton linters, microcrystalline Cellulose powder, and softwood bleached kraft pulp) for different dissolution and regeneration conditions. The oxygen permeabilities of these AU Cellulose Films vary widely from 0.003 to 0.03 mL μm m(-2) day(-1) kPa(-1) at 0% relative humidity depending on the conditions used to prepare the Films. The lowest oxygen permeability is achieved for the AU film prepared from 6 wt % Cellulose solution by regeneration with acetone at 0 °C. The oxygen permeabilities of the AU Cellulose Films are negatively correlated with their densities, and AU Films prepared from solutions with high Cellulose concentrations by regeneration in a solvent at low temperatures generally have low oxygen permeabilities. The AU Cellulose Films are, therefore, promising biobased packaging materials with high-oxygen barrier properties.

Jinhui Pang - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of physical properties of regenerated Cellulose Films fabricated with different Cellulose feedstocks in ionic liquid
    Carbohydrate Polymers, 2015
    Co-Authors: Jinhui Pang, Xin Tan, Qiaohui Zhang, Xueming Zhang, Miao Wu, Feng Xu, Runcang Sun
    Abstract:

    With the serious "white pollution" resulted from the non-biodegradable plastic Films, considerable attention has been directed toward the development of renewable and biodegradable Cellulose-based film materials as substitutes of petroleum-derived materials. In this study, environmentally friendly Cellulose Films were successfully prepared using different Celluloses (pine, cotton, bamboo, MCC) as raw materials and ionic liquid 1-ethyl-3-methylimidazolium acetate as a solvent. The SEM and AFM indicated that all Cellulose Films displayed a homogeneous and smooth surface. In addition, the FT-IR and XRD analysis showed the transition from Cellulose I to II was occurred after the dissolution and regeneration process. Furthermore, the Cellulose Films prepared by cotton linters and pine possessed the most excellent thermal stability and mechanical properties, which were suggested by the highest onset temperature (285 °C) and tensile stress (120 MPa), respectively. Their excellent properties of regenerated Cellulose Films are promising for applications in food packaging and medical materials.

  • Fabrication and Characterization of Regenerated Cellulose Films Using Different Ionic Liquids
    Spectroscopy, 2014
    Co-Authors: Jinhui Pang, Miao Wu, Yu-ying Wu, Xueming Zhang
    Abstract:

    The demand for substitution of fossil-based materials by renewable bio-based materials is increasing with the fossil resources reduction and its negative impacts on the environment. In this study, environmentally friendly regenerated Cellulose Films were successfully prepared using 1-allyl-3-methylimidazolium chloride (AmimCl), 1-butyl-3-methylimidazolium chloride (BmimCl), 1-ethyl-3-methylimidazolium chloride (EmimCl), and 1-ethyl-3-methylimidazolium acetate (EmimAc) as solvents, respectively. The results of morphology from scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed that all the Cellulose Films possessed smooth, highly uniform, and dense surface. The solid-state cross-polarization/magic angle spinning (CP/MAS) 13C NMR spectra and X-ray diffraction (XRD) corroborated that the transition from Cellulose I to II had occurred after preparation. Moreover, it was shown that the ionic liquid EmimAc possessed much stronger dissolubility for Cellulose as compared with other ionic liquids and the Cellulose film regenerated from EmimCl exhibited the most excellent tensile strength (119 Mpa). The notable properties of regenerated Cellulose Films are promising for applications in transparent biodegradable packaging and agricultural purpose as a substitute for PP and PE.

  • regenerated Cellulose film with enhanced tensile strength prepared with ionic liquid 1 ethyl 3 methylimidazolium acetate emimac
    Cellulose, 2013
    Co-Authors: Jinhui Pang, Xueming Zhang, Yu-ying Wu
    Abstract:

    In this study, environmentally friendly regenerated Cellulose Films with enhanced tensile strength were successfully prepared by incorporation of plasticizer agents using 1-ethyl-3-methylimidazolium acetate as solvent. The results of morphology from scanning electron microscopy and atomic force microscopy showed that Cellulose Films possessed homogeneously, and exhibited smooth structure. 13C CP/MAS NMR spectra showed that the regenerated Cellulose Films were transferred from Cellulose I to Cellulose II. Moreover, the incorporation of plasticizer agents, especially in the presence of glycerol, significantly improved the tensile strength of Cellulose film (143 MPa) as compared to the controlled sample. The notable properties of the regenerated Cellulose Films are promising for applications in transparent packaging.

  • fabrication of Cellulose film with enhanced mechanical properties in ionic liquid 1 allyl 3 methylimidaxolium chloride amimcl
    Materials, 2013
    Co-Authors: Jinhui Pang, Xueming Zhang, Yu-ying Wu
    Abstract:

    More and more attention has been paid to environmentally friendly bio-based renewable materials as the substitution of fossil-based materials, due to the increasing environmental concerns. In this study, regenerated Cellulose Films with enhanced mechanical property were prepared via incorporating different plasticizers using ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl) as the solvent. The characteristics of the Cellulose Films were investigated by scanning electron microscopy (SEM), atomic force microscopy (AFM), thermal analysis (TG), X-ray diffraction (XRD), 13C Solid-state cross-polarization/magic angle spinning nuclear magnetic resonance (CP/MAS NMR) and tensile testing. The results showed that the Cellulose Films exhibited a homogeneous and smooth surface structure. It was noted that the thermal stability of the regenerated Cellulose film plasticized with glycerol was increased compared with other regenerated Cellulose Films. Furthermore, the incorporation of plasticizers dramatically strengthened the tensile strength and improved the hydrophobicity of Cellulose Films, as compared to the control sample. Therefore, these notable results exhibited the potential utilization in producing environmentally friendly Cellulose Films with high performance properties.