The Experts below are selected from a list of 216885 Experts worldwide ranked by ideXlab platform
Jean-francois Berret - One of the best experts on this subject based on the ideXlab platform.
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Design of eco-friendly fabric Softeners: Structure, rheology and interaction with cellulose nanocrystals
Journal of Colloid and Interface Science, 2018Co-Authors: E.k. Oikonomou, N. Christov, G. Cristobal, C. Bourgaux, L. Heux, I. Boucenna, Jean-francois BerretAbstract:Hypothesis: Concentrated fabric Softeners are water-based formulations containing around 10-15 wt. % of double tailed esterquat surfactants primarily synthesized from palm oil. In recent patents, it was shown that a significant part of the surfactant contained in today's formulations can be reduced by circa 50 % and replaced by natural guar polymers without detrimental effects on the deposition and softening performances. We presently study the structure and rheology of these Softener formulations and identify the mechanisms at the origin of these effects. Experiments: The polymer additives used are guar gum polysaccharides, one cationic and one modified through addition of hydroxypropyl groups. Formulations with and without guar polymers are investigated using optical and cryo-transmission electron microscopy, small-angle light and X-ray scattering and finally rheology. Similar techniques are applied to study the phase behavior of Softener and cellulose nanocrystals considered here as a model for cotton. Findings: The esterquat surfactants are shown to assemble into micron-sized vesicles in the dilute and concentrated regimes. In the former, guar addition in small amounts does not impair the vesicular structure and stability. In the concentrated regime, cationic guars induce a local crowding associated to depletion interactions and leads to the formation of a local lamellar order. In rheology, adjusting the polymer concentration at 1/10th that of the surfactant is sufficient to offset the decrease of the elastic property associated with the surfactant reduction. In conclusion, we have shown that through an appropriate choice of natural additives it is possible to lower the concentration of surfactants in fabric conditioners by about half, a result that could represent a significant breakthrough in current home care formulations.
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Fabric Softener–Cellulose Nanocrystal Interaction: A Model for Assessing Surfactant Deposition on Cotton
Journal of Physical Chemistry B, 2017Co-Authors: E. Oikonomou, N. Christov, G. Cristobal, C. Bourgaux, L. Heux, F. Mousseau, M. Airiau, A. Vacher, Jean-francois BerretAbstract:There is currently a renewed interest for improving household and personal care formulations to provide more environment friendly products. Fabric conditioners used as Softeners have to fulfill a number of stability and biodegradability requirements. They should also display significant adsorption on cotton in the conditions of use. The quantification of surfactant adsorption remains however difficult because the fabric woven structure is complex and deposited amounts are generally small. Here we propose a method to evaluate cellulose/sur-factant interactions with increased detection sensitivity. The method is based on the use of cellulose nanocrystals in lieu of micron-sized fibers or yarns, combined with different techniques including light scattering, optical and electron microscopy, and electrophoretic mobility. Cellulose nanocrystals are rod-shaped nano-particles in the form of 200 nm laths that are negatively charged and can be dispersed in bulk solutions. In this work, we use a double-tailed cationic surfactant present in fabric Softener. Results show that the surfactants self-assemble into unilamellar, multivesicular and multilamellar vesicles, and interaction with cellulose nanocrys-tals is driven by electrostatics. Mutual interactions are strong and lead to the formation of large-scale aggregates, where the vesicles remain intact at the cellulose surface. The technique developed here could be exploited to rapidly assess fabric conditioner efficiency obtained by varying the nature and content of their chemical additives.
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fabric Softener cellulose nanocrystal interaction a model for assessing surfactant deposition on cotton
arXiv: Soft Condensed Matter, 2017Co-Authors: E. Oikonomou, N. Christov, G. Cristobal, L. Heux, F. Mousseau, M. Airiau, A. Vacher, Claudie Bourgaux, Jean-francois BerretAbstract:There is currently a renewed interest for improving household and personal care formulations to provide more environment friendly products. Fabric conditioners used as Softeners have to fulfill a number of stability and biodegradability requirements. They should also display significant adsorption on cotton in the conditions of use. The quantification of surfactant adsorption remains however difficult because the fabric woven structure is complex and deposited amounts are generally small. Here we propose a method to evaluate cellulose/sur-factant interactions with increased detection sensitivity. The method is based on the use of cellulose nanocrystals in lieu of micron-sized fibers or yarns, combined with different techni-ques including light scattering, optical and electron microscopy, and electrophoretic mobili-ty. Cellulose nanocrystals are rod-shaped nano-particles in the form of 200 nm laths that are negatively charged and can be dispersed in bulk solutions. In this work, we use a double-tailed cationic surfactant present in fabric Softener. Results show that the surfactants self-assemble into unilamellar, multivesicular and multilamellar vesicles, and interaction with cellulose nanocrys-tals is driven by electrostatics. Mutual interac-tions are strong and lead to the formation of large-scale aggregates, where the vesicles remain intact at the cellulose surface. The technique developed here could be exploited to rapidly assess fabric conditioner efficiency obtained by varying the nature and content of their chemical additives.
Shazia Tabassum - One of the best experts on this subject based on the ideXlab platform.
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preparation of rich handles soft cellulosic fabric using amino silicone based Softener part ii colorfastness properties
International Journal of Biological Macromolecules, 2011Co-Authors: Mohammad Zuber, Shazia Tabassum, Syed Barkaatulhasin, Tahir Jamil, Khalid Mahmood Zia, Muhammad Kaleem KhosaAbstract:The preparation of amino silicone based Softeners with different emulsifiers was carried out and adsorbed onto the surfaces of cotton and blends of cotton/polyester fabrics. The softened fabrics have high surface area, so poorly performance in washing and rubbing fastness. It is obvious from the results of colorfastness to rubbing and washing that some of the samples of the dyed fabric treated with prepared Softeners have shown some poor rating as compared to the untreated fabrics. However the other two samples have shown acceptable rubbing fastness results without losing softness and permanent handle. It can be observed that washing of the printed treated fabric remains unaffected almost in all the studied samples. Moreover, the application of the prepared Softeners has imparted anti pilling property to the fabric. It can be seen that there is a remarkable increase in weights of treated fabrics as compared to the untreated fabrics.
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preparation of rich handles soft cellulosic fabric using amino silicone based Softener part i surface smoothness and softness properties
International Journal of Biological Macromolecules, 2011Co-Authors: Shazia Tabassum, Syed Barkaatulhasin, Mohammad Zuber, Tahir Jamil, Muhammad Asghar JamalAbstract:A series of amino silicone based Softeners with different emulsifiers were prepared and adsorbed onto the surfaces of cotton and blends of cotton/polyester fabrics. Factors affecting the performance properties of the finished substrate such as post-treatment with amino functional silicone based Softener varying different emulsifiers in their formulations and its concentration on different processed fabrics were studied. Fixation of the amino-functional silicone Softener onto/or within the cellulose structure is accompanied by the formation of semi-inter-penetrated network structure thereby enhancing both the extent of crosslinking and networking as well as providing very high softness. The results of the experiments indicate that the amino silicone can form a hydrophobic film on both cotton and blends of cotton/polyester fabrics and its coating reduces the surface roughness significantly. Furthermore, the roughness becomes lesser with an increase in the applied strength of amino silicone based Softener.
N. Christov - One of the best experts on this subject based on the ideXlab platform.
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Design of eco-friendly fabric Softeners: Structure, rheology and interaction with cellulose nanocrystals
Journal of Colloid and Interface Science, 2018Co-Authors: E.k. Oikonomou, N. Christov, G. Cristobal, C. Bourgaux, L. Heux, I. Boucenna, Jean-francois BerretAbstract:Hypothesis: Concentrated fabric Softeners are water-based formulations containing around 10-15 wt. % of double tailed esterquat surfactants primarily synthesized from palm oil. In recent patents, it was shown that a significant part of the surfactant contained in today's formulations can be reduced by circa 50 % and replaced by natural guar polymers without detrimental effects on the deposition and softening performances. We presently study the structure and rheology of these Softener formulations and identify the mechanisms at the origin of these effects. Experiments: The polymer additives used are guar gum polysaccharides, one cationic and one modified through addition of hydroxypropyl groups. Formulations with and without guar polymers are investigated using optical and cryo-transmission electron microscopy, small-angle light and X-ray scattering and finally rheology. Similar techniques are applied to study the phase behavior of Softener and cellulose nanocrystals considered here as a model for cotton. Findings: The esterquat surfactants are shown to assemble into micron-sized vesicles in the dilute and concentrated regimes. In the former, guar addition in small amounts does not impair the vesicular structure and stability. In the concentrated regime, cationic guars induce a local crowding associated to depletion interactions and leads to the formation of a local lamellar order. In rheology, adjusting the polymer concentration at 1/10th that of the surfactant is sufficient to offset the decrease of the elastic property associated with the surfactant reduction. In conclusion, we have shown that through an appropriate choice of natural additives it is possible to lower the concentration of surfactants in fabric conditioners by about half, a result that could represent a significant breakthrough in current home care formulations.
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Fabric Softener–Cellulose Nanocrystal Interaction: A Model for Assessing Surfactant Deposition on Cotton
Journal of Physical Chemistry B, 2017Co-Authors: E. Oikonomou, N. Christov, G. Cristobal, C. Bourgaux, L. Heux, F. Mousseau, M. Airiau, A. Vacher, Jean-francois BerretAbstract:There is currently a renewed interest for improving household and personal care formulations to provide more environment friendly products. Fabric conditioners used as Softeners have to fulfill a number of stability and biodegradability requirements. They should also display significant adsorption on cotton in the conditions of use. The quantification of surfactant adsorption remains however difficult because the fabric woven structure is complex and deposited amounts are generally small. Here we propose a method to evaluate cellulose/sur-factant interactions with increased detection sensitivity. The method is based on the use of cellulose nanocrystals in lieu of micron-sized fibers or yarns, combined with different techniques including light scattering, optical and electron microscopy, and electrophoretic mobility. Cellulose nanocrystals are rod-shaped nano-particles in the form of 200 nm laths that are negatively charged and can be dispersed in bulk solutions. In this work, we use a double-tailed cationic surfactant present in fabric Softener. Results show that the surfactants self-assemble into unilamellar, multivesicular and multilamellar vesicles, and interaction with cellulose nanocrys-tals is driven by electrostatics. Mutual interactions are strong and lead to the formation of large-scale aggregates, where the vesicles remain intact at the cellulose surface. The technique developed here could be exploited to rapidly assess fabric conditioner efficiency obtained by varying the nature and content of their chemical additives.
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fabric Softener cellulose nanocrystal interaction a model for assessing surfactant deposition on cotton
arXiv: Soft Condensed Matter, 2017Co-Authors: E. Oikonomou, N. Christov, G. Cristobal, L. Heux, F. Mousseau, M. Airiau, A. Vacher, Claudie Bourgaux, Jean-francois BerretAbstract:There is currently a renewed interest for improving household and personal care formulations to provide more environment friendly products. Fabric conditioners used as Softeners have to fulfill a number of stability and biodegradability requirements. They should also display significant adsorption on cotton in the conditions of use. The quantification of surfactant adsorption remains however difficult because the fabric woven structure is complex and deposited amounts are generally small. Here we propose a method to evaluate cellulose/sur-factant interactions with increased detection sensitivity. The method is based on the use of cellulose nanocrystals in lieu of micron-sized fibers or yarns, combined with different techni-ques including light scattering, optical and electron microscopy, and electrophoretic mobili-ty. Cellulose nanocrystals are rod-shaped nano-particles in the form of 200 nm laths that are negatively charged and can be dispersed in bulk solutions. In this work, we use a double-tailed cationic surfactant present in fabric Softener. Results show that the surfactants self-assemble into unilamellar, multivesicular and multilamellar vesicles, and interaction with cellulose nanocrys-tals is driven by electrostatics. Mutual interac-tions are strong and lead to the formation of large-scale aggregates, where the vesicles remain intact at the cellulose surface. The technique developed here could be exploited to rapidly assess fabric conditioner efficiency obtained by varying the nature and content of their chemical additives.
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Fabric Softener–Cellulose Nanocrystal Interaction: A Model for Assessing Surfactant Deposition on Cotton
2017Co-Authors: E.k. Oikonomou, N. Christov, G. Cristobal, F. Mousseau, A. Vache, M. Airiau, C. Ourgau, L. Heu, J.-f. ErreAbstract:There is currently a renewed interest for improving household and personal-care formulations to provide more environment-friendly products. Fabric conditioners used as Softeners have to fulfill a number of stability and biodegradability requirements. They should also display significant adsorption on cotton under the conditions of use. The quantification of surfactant adsorption remains however difficult because the fabric-woven structure is complex and deposited amounts are generally small. Here, we propose a method to evaluate cellulose–surfactant interactions with increased detection sensitivity. The method is based on the use of cellulose nanocrystals (CNCs) in lieu of micron-sized fibers or yarns, combined with different techniques, including light scattering, optical and electron microscopy, and electrophoretic mobility. CNCs are rod-shaped nanoparticles in the form of 200 nm laths that are negatively charged and can be dispersed in bulk solutions. In this work, we use a double-tailed cationic surfactant present in fabric Softener. Results show that the surfactants self-assemble into unilamellar, multivesicular, and multilamellar vesicles, and the interaction with CNCs is driven by electrostatics. Mutual interactions are strong and lead to the formation of large-scale aggregates, where the vesicles remain intact at the cellulose surface. The technique developed here could be exploited to rapidly assess the fabric conditioner efficiency obtained by varying the nature and content of their chemical additives
G. Cristobal - One of the best experts on this subject based on the ideXlab platform.
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Design of eco-friendly fabric Softeners: Structure, rheology and interaction with cellulose nanocrystals
Journal of Colloid and Interface Science, 2018Co-Authors: E.k. Oikonomou, N. Christov, G. Cristobal, C. Bourgaux, L. Heux, I. Boucenna, Jean-francois BerretAbstract:Hypothesis: Concentrated fabric Softeners are water-based formulations containing around 10-15 wt. % of double tailed esterquat surfactants primarily synthesized from palm oil. In recent patents, it was shown that a significant part of the surfactant contained in today's formulations can be reduced by circa 50 % and replaced by natural guar polymers without detrimental effects on the deposition and softening performances. We presently study the structure and rheology of these Softener formulations and identify the mechanisms at the origin of these effects. Experiments: The polymer additives used are guar gum polysaccharides, one cationic and one modified through addition of hydroxypropyl groups. Formulations with and without guar polymers are investigated using optical and cryo-transmission electron microscopy, small-angle light and X-ray scattering and finally rheology. Similar techniques are applied to study the phase behavior of Softener and cellulose nanocrystals considered here as a model for cotton. Findings: The esterquat surfactants are shown to assemble into micron-sized vesicles in the dilute and concentrated regimes. In the former, guar addition in small amounts does not impair the vesicular structure and stability. In the concentrated regime, cationic guars induce a local crowding associated to depletion interactions and leads to the formation of a local lamellar order. In rheology, adjusting the polymer concentration at 1/10th that of the surfactant is sufficient to offset the decrease of the elastic property associated with the surfactant reduction. In conclusion, we have shown that through an appropriate choice of natural additives it is possible to lower the concentration of surfactants in fabric conditioners by about half, a result that could represent a significant breakthrough in current home care formulations.
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Fabric Softener–Cellulose Nanocrystal Interaction: A Model for Assessing Surfactant Deposition on Cotton
Journal of Physical Chemistry B, 2017Co-Authors: E. Oikonomou, N. Christov, G. Cristobal, C. Bourgaux, L. Heux, F. Mousseau, M. Airiau, A. Vacher, Jean-francois BerretAbstract:There is currently a renewed interest for improving household and personal care formulations to provide more environment friendly products. Fabric conditioners used as Softeners have to fulfill a number of stability and biodegradability requirements. They should also display significant adsorption on cotton in the conditions of use. The quantification of surfactant adsorption remains however difficult because the fabric woven structure is complex and deposited amounts are generally small. Here we propose a method to evaluate cellulose/sur-factant interactions with increased detection sensitivity. The method is based on the use of cellulose nanocrystals in lieu of micron-sized fibers or yarns, combined with different techniques including light scattering, optical and electron microscopy, and electrophoretic mobility. Cellulose nanocrystals are rod-shaped nano-particles in the form of 200 nm laths that are negatively charged and can be dispersed in bulk solutions. In this work, we use a double-tailed cationic surfactant present in fabric Softener. Results show that the surfactants self-assemble into unilamellar, multivesicular and multilamellar vesicles, and interaction with cellulose nanocrys-tals is driven by electrostatics. Mutual interactions are strong and lead to the formation of large-scale aggregates, where the vesicles remain intact at the cellulose surface. The technique developed here could be exploited to rapidly assess fabric conditioner efficiency obtained by varying the nature and content of their chemical additives.
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fabric Softener cellulose nanocrystal interaction a model for assessing surfactant deposition on cotton
arXiv: Soft Condensed Matter, 2017Co-Authors: E. Oikonomou, N. Christov, G. Cristobal, L. Heux, F. Mousseau, M. Airiau, A. Vacher, Claudie Bourgaux, Jean-francois BerretAbstract:There is currently a renewed interest for improving household and personal care formulations to provide more environment friendly products. Fabric conditioners used as Softeners have to fulfill a number of stability and biodegradability requirements. They should also display significant adsorption on cotton in the conditions of use. The quantification of surfactant adsorption remains however difficult because the fabric woven structure is complex and deposited amounts are generally small. Here we propose a method to evaluate cellulose/sur-factant interactions with increased detection sensitivity. The method is based on the use of cellulose nanocrystals in lieu of micron-sized fibers or yarns, combined with different techni-ques including light scattering, optical and electron microscopy, and electrophoretic mobili-ty. Cellulose nanocrystals are rod-shaped nano-particles in the form of 200 nm laths that are negatively charged and can be dispersed in bulk solutions. In this work, we use a double-tailed cationic surfactant present in fabric Softener. Results show that the surfactants self-assemble into unilamellar, multivesicular and multilamellar vesicles, and interaction with cellulose nanocrys-tals is driven by electrostatics. Mutual interac-tions are strong and lead to the formation of large-scale aggregates, where the vesicles remain intact at the cellulose surface. The technique developed here could be exploited to rapidly assess fabric conditioner efficiency obtained by varying the nature and content of their chemical additives.
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Fabric Softener–Cellulose Nanocrystal Interaction: A Model for Assessing Surfactant Deposition on Cotton
2017Co-Authors: E.k. Oikonomou, N. Christov, G. Cristobal, F. Mousseau, A. Vache, M. Airiau, C. Ourgau, L. Heu, J.-f. ErreAbstract:There is currently a renewed interest for improving household and personal-care formulations to provide more environment-friendly products. Fabric conditioners used as Softeners have to fulfill a number of stability and biodegradability requirements. They should also display significant adsorption on cotton under the conditions of use. The quantification of surfactant adsorption remains however difficult because the fabric-woven structure is complex and deposited amounts are generally small. Here, we propose a method to evaluate cellulose–surfactant interactions with increased detection sensitivity. The method is based on the use of cellulose nanocrystals (CNCs) in lieu of micron-sized fibers or yarns, combined with different techniques, including light scattering, optical and electron microscopy, and electrophoretic mobility. CNCs are rod-shaped nanoparticles in the form of 200 nm laths that are negatively charged and can be dispersed in bulk solutions. In this work, we use a double-tailed cationic surfactant present in fabric Softener. Results show that the surfactants self-assemble into unilamellar, multivesicular, and multilamellar vesicles, and the interaction with CNCs is driven by electrostatics. Mutual interactions are strong and lead to the formation of large-scale aggregates, where the vesicles remain intact at the cellulose surface. The technique developed here could be exploited to rapidly assess the fabric conditioner efficiency obtained by varying the nature and content of their chemical additives
Mohammad Zuber - One of the best experts on this subject based on the ideXlab platform.
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preparation of rich handles soft cellulosic fabric using amino silicone based Softener part ii colorfastness properties
International Journal of Biological Macromolecules, 2011Co-Authors: Mohammad Zuber, Shazia Tabassum, Syed Barkaatulhasin, Tahir Jamil, Khalid Mahmood Zia, Muhammad Kaleem KhosaAbstract:The preparation of amino silicone based Softeners with different emulsifiers was carried out and adsorbed onto the surfaces of cotton and blends of cotton/polyester fabrics. The softened fabrics have high surface area, so poorly performance in washing and rubbing fastness. It is obvious from the results of colorfastness to rubbing and washing that some of the samples of the dyed fabric treated with prepared Softeners have shown some poor rating as compared to the untreated fabrics. However the other two samples have shown acceptable rubbing fastness results without losing softness and permanent handle. It can be observed that washing of the printed treated fabric remains unaffected almost in all the studied samples. Moreover, the application of the prepared Softeners has imparted anti pilling property to the fabric. It can be seen that there is a remarkable increase in weights of treated fabrics as compared to the untreated fabrics.
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preparation of rich handles soft cellulosic fabric using amino silicone based Softener part i surface smoothness and softness properties
International Journal of Biological Macromolecules, 2011Co-Authors: Shazia Tabassum, Syed Barkaatulhasin, Mohammad Zuber, Tahir Jamil, Muhammad Asghar JamalAbstract:A series of amino silicone based Softeners with different emulsifiers were prepared and adsorbed onto the surfaces of cotton and blends of cotton/polyester fabrics. Factors affecting the performance properties of the finished substrate such as post-treatment with amino functional silicone based Softener varying different emulsifiers in their formulations and its concentration on different processed fabrics were studied. Fixation of the amino-functional silicone Softener onto/or within the cellulose structure is accompanied by the formation of semi-inter-penetrated network structure thereby enhancing both the extent of crosslinking and networking as well as providing very high softness. The results of the experiments indicate that the amino silicone can form a hydrophobic film on both cotton and blends of cotton/polyester fabrics and its coating reduces the surface roughness significantly. Furthermore, the roughness becomes lesser with an increase in the applied strength of amino silicone based Softener.
