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Lei Jiang - One of the best experts on this subject based on the ideXlab platform.
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Design of Honeycomb Structure surfaces with controllable oil adhesion underwater
RSC Advances, 2015Co-Authors: Muchen Li, Liping Heng, Lei JiangAbstract:In this paper, we fabricate Honeycomb-like poly acrylic acid (PAA) surfaces and achieve oil adhesion transitions underwater. Characterization of the adhesion indicates that the porous Honeycomb Structure PAA films can serve as high oil adhesive surfaces both in acidic and in basic aqueous phases. Besides, the adhesion can be controlled by changing the size of the pores and the solution pH. The Honeycomb Structure film prepared using a template with a theoretical diameter of 6 μm has the highest adhesion in basic solution, which can snap some oil droplets from the original oil. In contrast, the smooth films and other Honeycomb Structure films in acidic and basic solutions cannot snap an oil droplet. The switchable oil adhesion is attributed to the change of the triple-phase liquid/liquid/solid contact line (TCL) continuity and the negative pressure induced by the pores. This highly adhesive porous film was used as a “mechanical hand” to transfer micro-droplets successfully underwater. The unique adhesive phenomenon of the Honeycomb Structure will be useful for manipulating oil droplet behavior and suitable for the application of controlling liquid collection and transportation underwater.
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ordered Honeycomb Structure surface generated by breath figures for liquid reprography
Advanced Functional Materials, 2014Co-Authors: Lei Jiang, Muchen Li, Liping Heng, Jie Li, Dongliang Tian, Ben Zhong TangAbstract:pH, [ 25,26 ] light irradiation, [ 27–29 ] electric fi elds, [ 30,31 ] and solvent treatment. [ 32,33 ] Specially, the cooperation of two different stimuli seems to be a trend for more effective surface wetting tunability. [ 34–37 ] Among them, the photoelectric cooperation stimulus is a more-effective way for regulating surface wettability. Recently, our group achieved the patterned wettability transition from the Cassie [ 38 ] to the Wenzel state [ 39 ] on superhydrophobic surfaces such as aligned-ZnO-nanorod array surface, [ 40 ] aligned-nanopore array surface of TiO 2 -coated nanoporous AAO fi lm [ 41 ] and CdS quantum dots sensitized TiO 2 nanotubes [ 42 ] by photoelectric cooperative wetting process, which had been used for liquid reprography. However, all of these surfaces reported above based on inorganic materials are prone to damage due to their low mechanical strength and high frangibility, so they could not sustain repeated printing. Meanwhile, because of the limited categories of the inorganic materials, their practical application was limited. In addition, all of these surfaces reported above are superhydrophobic surfaces, while the practical applications of superhydrophobic surfaces are still not universal because there are many problems needed to be solved. Firstly, it is diffi cult to prepare a large area of superhydrophobic surfaces because of the harsh preparation conditions. Secondly, superhydrophobic surfaces are not stable and robust Ordered Honeycomb Structure Surface Generated by Breath Figures for Liquid Reprography
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bioinspired design of Honeycomb Structure interfaces with controllable water adhesion
Langmuir, 2013Co-Authors: Liping Heng, Bin Wang, Xiangfu Meng, Lei JiangAbstract:Inspired by biological attachment systems, we fabricated the Honeycomb structural films with different diameters by breath figure (BF) method, which were similar to the patterned octopus suckers. The experimental results showed, besides different van der Waals forces between the polystyrene (PS) surfaces and water, another important factor; that is, different negative pressures produced by different volumes of sealed air could be a crucial factor for the different adhesions. So the water adhesive forces of the as-prepared films can be effectively controlled from relative high to relative low adhesion by varying the pore diameters, which effectively adjusted the negative pressures produced by the pores. This unique adhesive phenomenon of Honeycomb Structure will be very useful for manipulating water droplet behaviors, as well as controlling liquid collection and transportation. These findings are interesting and helpful for us to further understand the biological attachment systems and to optimize the desi...
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advances in fabrication materials of Honeycomb Structure films by the breath figure method
Materials, 2013Co-Authors: Liping Heng, Muchen Li, Bin Wang, Yuqi Zhang, Lei JiangAbstract:Creatures in nature possess almost perfect Structures and properties, and exhibit harmonization and unification between Structure and function. Biomimetics, mimicking nature for engineering solutions, provides a model for the development of functional surfaces with special properties. Recently, Honeycomb Structure materials have attracted wide attention for both fundamental research and practical applications and have become an increasingly hot research topic. Though progress in the field of breath-figure formation has been reviewed, the advance in the fabrication materials of bio-inspired Honeycomb Structure films has not been discussed. Here we review the recent progress of Honeycomb Structure fabrication materials which were prepared by the breath-figure method. The application of breath figures for the generation of all kinds of Honeycomb is discussed.
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Multiscale bio-inspired Honeycomb Structure material with high mechanical strength and low density
Journal of Materials Chemistry, 2012Co-Authors: Xin Xu, L P Heng, Longxiang Lin, X. J. Zhao, J. Ma, Lei JiangAbstract:We report a kind of polymer ordered porous Honeycomb Structure film with enhanced mechanical strength and low density. The film is fabricated with polyimide as a basic Structure and nano-clay as the enhanced layer in the Honeycomb walls, which mimics the multi-scale Structure of natural Honeycombs. After examining the mechanical properties of the bio-inspired Honeycomb Structures with different contents of clay, we find that the hardness of the Honeycomb films increases with increasing clay content, and reaches a maximum value of 0.037GPa on average, which is about 5 times that for the Honeycomb film without clay. Because of the existence of the porous Structure, the bulk density of the multiscale bio-inspired Honeycomb Structure films fabricated with the solution containing 0.9 wt% clay content is 35.7% of the Honeycomb Structure films fabricated with the solution without clay, and the apparent density of the Honeycomb Structure films fabricated with the solution containing 0.9 wt% clay content is 67.5% of the Honeycomb Structure films fabricated with the solution without clay, and the porosity increases by 45.6%. In addition, the study of the thermal properties indicates that the porous Structure does not decrease the thermal stability of the original materials. Meanwhile, the introduction of the clay into the film can increase the thermal stability of the materials slightly. So this kind of multiscale bio-inspired Honeycomb Structure, with high mechanical strength, low density and excellent thermal stability, is considered to have wide applications in the areas of tissue engineering, aeronautical materials, separation films in lithium-ion batteries, and so on.
Kriskrai Sitthiseripratip - One of the best experts on this subject based on the ideXlab platform.
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fabrication of three dimensional Honeycomb Structure for aeronautical applications using selective laser melting a preliminary investigation
Rapid Prototyping Journal, 2014Co-Authors: Nattapon Chantarapanich, Apinya Laohaprapanon, Pongnarin Jiamwatthanachai, Prasert Chalermkarnnon, Sedthawatt Sucharitpwatskul, Puttisak Puttawibul, Sirikul Wisutmethangoon, Kriskrai SitthiseripratipAbstract:Purpose – The purpose of this paper was to investigate the feasibility on design and production of a three-dimensional Honeycomb based on selective laser melting (SLM) technique for use in aeronautical application. Design/methodology/approach – Various polyhedrons were investigated using their mechanical property, i.e. strain energy density (SED), by means of finite element (FE) analysis for the suitability of use in aerospace application; the highest SED polyhedron was selected as a candidate polyhedron. From the FE analysis, the truncated octahedron (three-dimensional Honeycomb) Structure was considered to be the potential candidate. Polyhedron size and beam thickness of the open-cellular three-dimensional Honeycomb Structure were modelled and analysed to observe how the geometric properties influence the stiffness of the Structure. One selected model of open-cellular Honeycomb (unit cell size: 2.5 mm and beam thickness: 0.15 mm) was fabricated using SLM. The SLM prototypes were assessed by their mechan...
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Fabrication of three-dimensional Honeycomb Structure for aeronautical applications using selective laser melting: A preliminary investigation
Rapid Prototyping Journal, 2014Co-Authors: Nattapon Chantarapanich, Apinya Laohaprapanon, Pongnarin Jiamwatthanachai, Prasert Chalermkarnnon, Sedthawatt Sucharitpwatskul, Puttisak Puttawibul, Sirikul Wisutmethangoon, Kriskrai SitthiseripratipAbstract:Purpose - The purpose of this paper was to investigate the feasibility on design and production of a three-dimensional Honeycomb based on selective laser melting (SLM) technique for use in aeronautical application. Design/methodology/approach - Various polyhedrons were investigated using their mechanical property, i.e. strain energy density (SED), by means of finite element (FE) analysis for the suitability of use in aerospace application; the highest SED polyhedron was selected as a candidate polyhedron. From the FE analysis, the truncated octahedron (three-dimensional Honeycomb) Structure was considered to be the potential candidate. Polyhedron size and beam thickness of the open-cellular three-dimensional Honeycomb Structure were modelled and analysed to observe how the geometric properties influence the stiffness of the Structure. One selected model of open-cellular Honeycomb (unit cell size: 2.5 mm and beam thickness: 0.15 mm) was fabricated using SLM. The SLM prototypes were assessed by their mechanical properties, including compressive strength, stiffness and strength per weight ratio. To investigate the feasibility in production of airfoil section sandwich Structure, NACA 0016 airfoil section with three-dimensional Honeycomb core was constructed and also fabricated using SLM. Findings - According to the result, the three-dimensional Honeycomb has elastic modulus of 63.18 MPa and compressive strength of 1.1 MPa, whereas strength per weight ratio is approximately 5.0 × 103 Nm/kg. The FE result presented good agreement to the mechanical testing result. The geometric parameter of the three-dimensional Honeycomb Structure influences the stiffness, especially the beam thickness, i.e. increase of beam thickness obviously produces the stiffer Structure. In addition, the sandwich Structure of airfoil was also successfully manufactured. Originality/value - This work demonstrated the production of sandwich Structure of airfoil using SLM for aeronautical engineering. This investigation has shown the potential applications of the three-dimensional Structure, e.g. aircraft interior compartment components and Structure of unmanned aerial vehicles. © Emerald Group Publishing Limited.
Nattapon Chantarapanich - One of the best experts on this subject based on the ideXlab platform.
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fabrication of three dimensional Honeycomb Structure for aeronautical applications using selective laser melting a preliminary investigation
Rapid Prototyping Journal, 2014Co-Authors: Nattapon Chantarapanich, Apinya Laohaprapanon, Pongnarin Jiamwatthanachai, Prasert Chalermkarnnon, Sedthawatt Sucharitpwatskul, Puttisak Puttawibul, Sirikul Wisutmethangoon, Kriskrai SitthiseripratipAbstract:Purpose – The purpose of this paper was to investigate the feasibility on design and production of a three-dimensional Honeycomb based on selective laser melting (SLM) technique for use in aeronautical application. Design/methodology/approach – Various polyhedrons were investigated using their mechanical property, i.e. strain energy density (SED), by means of finite element (FE) analysis for the suitability of use in aerospace application; the highest SED polyhedron was selected as a candidate polyhedron. From the FE analysis, the truncated octahedron (three-dimensional Honeycomb) Structure was considered to be the potential candidate. Polyhedron size and beam thickness of the open-cellular three-dimensional Honeycomb Structure were modelled and analysed to observe how the geometric properties influence the stiffness of the Structure. One selected model of open-cellular Honeycomb (unit cell size: 2.5 mm and beam thickness: 0.15 mm) was fabricated using SLM. The SLM prototypes were assessed by their mechan...
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Fabrication of three-dimensional Honeycomb Structure for aeronautical applications using selective laser melting: A preliminary investigation
Rapid Prototyping Journal, 2014Co-Authors: Nattapon Chantarapanich, Apinya Laohaprapanon, Pongnarin Jiamwatthanachai, Prasert Chalermkarnnon, Sedthawatt Sucharitpwatskul, Puttisak Puttawibul, Sirikul Wisutmethangoon, Kriskrai SitthiseripratipAbstract:Purpose - The purpose of this paper was to investigate the feasibility on design and production of a three-dimensional Honeycomb based on selective laser melting (SLM) technique for use in aeronautical application. Design/methodology/approach - Various polyhedrons were investigated using their mechanical property, i.e. strain energy density (SED), by means of finite element (FE) analysis for the suitability of use in aerospace application; the highest SED polyhedron was selected as a candidate polyhedron. From the FE analysis, the truncated octahedron (three-dimensional Honeycomb) Structure was considered to be the potential candidate. Polyhedron size and beam thickness of the open-cellular three-dimensional Honeycomb Structure were modelled and analysed to observe how the geometric properties influence the stiffness of the Structure. One selected model of open-cellular Honeycomb (unit cell size: 2.5 mm and beam thickness: 0.15 mm) was fabricated using SLM. The SLM prototypes were assessed by their mechanical properties, including compressive strength, stiffness and strength per weight ratio. To investigate the feasibility in production of airfoil section sandwich Structure, NACA 0016 airfoil section with three-dimensional Honeycomb core was constructed and also fabricated using SLM. Findings - According to the result, the three-dimensional Honeycomb has elastic modulus of 63.18 MPa and compressive strength of 1.1 MPa, whereas strength per weight ratio is approximately 5.0 × 103 Nm/kg. The FE result presented good agreement to the mechanical testing result. The geometric parameter of the three-dimensional Honeycomb Structure influences the stiffness, especially the beam thickness, i.e. increase of beam thickness obviously produces the stiffer Structure. In addition, the sandwich Structure of airfoil was also successfully manufactured. Originality/value - This work demonstrated the production of sandwich Structure of airfoil using SLM for aeronautical engineering. This investigation has shown the potential applications of the three-dimensional Structure, e.g. aircraft interior compartment components and Structure of unmanned aerial vehicles. © Emerald Group Publishing Limited.
Liping Heng - One of the best experts on this subject based on the ideXlab platform.
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Design of Honeycomb Structure surfaces with controllable oil adhesion underwater
RSC Advances, 2015Co-Authors: Muchen Li, Liping Heng, Lei JiangAbstract:In this paper, we fabricate Honeycomb-like poly acrylic acid (PAA) surfaces and achieve oil adhesion transitions underwater. Characterization of the adhesion indicates that the porous Honeycomb Structure PAA films can serve as high oil adhesive surfaces both in acidic and in basic aqueous phases. Besides, the adhesion can be controlled by changing the size of the pores and the solution pH. The Honeycomb Structure film prepared using a template with a theoretical diameter of 6 μm has the highest adhesion in basic solution, which can snap some oil droplets from the original oil. In contrast, the smooth films and other Honeycomb Structure films in acidic and basic solutions cannot snap an oil droplet. The switchable oil adhesion is attributed to the change of the triple-phase liquid/liquid/solid contact line (TCL) continuity and the negative pressure induced by the pores. This highly adhesive porous film was used as a “mechanical hand” to transfer micro-droplets successfully underwater. The unique adhesive phenomenon of the Honeycomb Structure will be useful for manipulating oil droplet behavior and suitable for the application of controlling liquid collection and transportation underwater.
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ordered Honeycomb Structure surface generated by breath figures for liquid reprography
Advanced Functional Materials, 2014Co-Authors: Lei Jiang, Muchen Li, Liping Heng, Jie Li, Dongliang Tian, Ben Zhong TangAbstract:pH, [ 25,26 ] light irradiation, [ 27–29 ] electric fi elds, [ 30,31 ] and solvent treatment. [ 32,33 ] Specially, the cooperation of two different stimuli seems to be a trend for more effective surface wetting tunability. [ 34–37 ] Among them, the photoelectric cooperation stimulus is a more-effective way for regulating surface wettability. Recently, our group achieved the patterned wettability transition from the Cassie [ 38 ] to the Wenzel state [ 39 ] on superhydrophobic surfaces such as aligned-ZnO-nanorod array surface, [ 40 ] aligned-nanopore array surface of TiO 2 -coated nanoporous AAO fi lm [ 41 ] and CdS quantum dots sensitized TiO 2 nanotubes [ 42 ] by photoelectric cooperative wetting process, which had been used for liquid reprography. However, all of these surfaces reported above based on inorganic materials are prone to damage due to their low mechanical strength and high frangibility, so they could not sustain repeated printing. Meanwhile, because of the limited categories of the inorganic materials, their practical application was limited. In addition, all of these surfaces reported above are superhydrophobic surfaces, while the practical applications of superhydrophobic surfaces are still not universal because there are many problems needed to be solved. Firstly, it is diffi cult to prepare a large area of superhydrophobic surfaces because of the harsh preparation conditions. Secondly, superhydrophobic surfaces are not stable and robust Ordered Honeycomb Structure Surface Generated by Breath Figures for Liquid Reprography
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bioinspired design of Honeycomb Structure interfaces with controllable water adhesion
Langmuir, 2013Co-Authors: Liping Heng, Bin Wang, Xiangfu Meng, Lei JiangAbstract:Inspired by biological attachment systems, we fabricated the Honeycomb structural films with different diameters by breath figure (BF) method, which were similar to the patterned octopus suckers. The experimental results showed, besides different van der Waals forces between the polystyrene (PS) surfaces and water, another important factor; that is, different negative pressures produced by different volumes of sealed air could be a crucial factor for the different adhesions. So the water adhesive forces of the as-prepared films can be effectively controlled from relative high to relative low adhesion by varying the pore diameters, which effectively adjusted the negative pressures produced by the pores. This unique adhesive phenomenon of Honeycomb Structure will be very useful for manipulating water droplet behaviors, as well as controlling liquid collection and transportation. These findings are interesting and helpful for us to further understand the biological attachment systems and to optimize the desi...
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advances in fabrication materials of Honeycomb Structure films by the breath figure method
Materials, 2013Co-Authors: Liping Heng, Muchen Li, Bin Wang, Yuqi Zhang, Lei JiangAbstract:Creatures in nature possess almost perfect Structures and properties, and exhibit harmonization and unification between Structure and function. Biomimetics, mimicking nature for engineering solutions, provides a model for the development of functional surfaces with special properties. Recently, Honeycomb Structure materials have attracted wide attention for both fundamental research and practical applications and have become an increasingly hot research topic. Though progress in the field of breath-figure formation has been reviewed, the advance in the fabrication materials of bio-inspired Honeycomb Structure films has not been discussed. Here we review the recent progress of Honeycomb Structure fabrication materials which were prepared by the breath-figure method. The application of breath figures for the generation of all kinds of Honeycomb is discussed.
Prasert Chalermkarnnon - One of the best experts on this subject based on the ideXlab platform.
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fabrication of three dimensional Honeycomb Structure for aeronautical applications using selective laser melting a preliminary investigation
Rapid Prototyping Journal, 2014Co-Authors: Nattapon Chantarapanich, Apinya Laohaprapanon, Pongnarin Jiamwatthanachai, Prasert Chalermkarnnon, Sedthawatt Sucharitpwatskul, Puttisak Puttawibul, Sirikul Wisutmethangoon, Kriskrai SitthiseripratipAbstract:Purpose – The purpose of this paper was to investigate the feasibility on design and production of a three-dimensional Honeycomb based on selective laser melting (SLM) technique for use in aeronautical application. Design/methodology/approach – Various polyhedrons were investigated using their mechanical property, i.e. strain energy density (SED), by means of finite element (FE) analysis for the suitability of use in aerospace application; the highest SED polyhedron was selected as a candidate polyhedron. From the FE analysis, the truncated octahedron (three-dimensional Honeycomb) Structure was considered to be the potential candidate. Polyhedron size and beam thickness of the open-cellular three-dimensional Honeycomb Structure were modelled and analysed to observe how the geometric properties influence the stiffness of the Structure. One selected model of open-cellular Honeycomb (unit cell size: 2.5 mm and beam thickness: 0.15 mm) was fabricated using SLM. The SLM prototypes were assessed by their mechan...
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Fabrication of three-dimensional Honeycomb Structure for aeronautical applications using selective laser melting: A preliminary investigation
Rapid Prototyping Journal, 2014Co-Authors: Nattapon Chantarapanich, Apinya Laohaprapanon, Pongnarin Jiamwatthanachai, Prasert Chalermkarnnon, Sedthawatt Sucharitpwatskul, Puttisak Puttawibul, Sirikul Wisutmethangoon, Kriskrai SitthiseripratipAbstract:Purpose - The purpose of this paper was to investigate the feasibility on design and production of a three-dimensional Honeycomb based on selective laser melting (SLM) technique for use in aeronautical application. Design/methodology/approach - Various polyhedrons were investigated using their mechanical property, i.e. strain energy density (SED), by means of finite element (FE) analysis for the suitability of use in aerospace application; the highest SED polyhedron was selected as a candidate polyhedron. From the FE analysis, the truncated octahedron (three-dimensional Honeycomb) Structure was considered to be the potential candidate. Polyhedron size and beam thickness of the open-cellular three-dimensional Honeycomb Structure were modelled and analysed to observe how the geometric properties influence the stiffness of the Structure. One selected model of open-cellular Honeycomb (unit cell size: 2.5 mm and beam thickness: 0.15 mm) was fabricated using SLM. The SLM prototypes were assessed by their mechanical properties, including compressive strength, stiffness and strength per weight ratio. To investigate the feasibility in production of airfoil section sandwich Structure, NACA 0016 airfoil section with three-dimensional Honeycomb core was constructed and also fabricated using SLM. Findings - According to the result, the three-dimensional Honeycomb has elastic modulus of 63.18 MPa and compressive strength of 1.1 MPa, whereas strength per weight ratio is approximately 5.0 × 103 Nm/kg. The FE result presented good agreement to the mechanical testing result. The geometric parameter of the three-dimensional Honeycomb Structure influences the stiffness, especially the beam thickness, i.e. increase of beam thickness obviously produces the stiffer Structure. In addition, the sandwich Structure of airfoil was also successfully manufactured. Originality/value - This work demonstrated the production of sandwich Structure of airfoil using SLM for aeronautical engineering. This investigation has shown the potential applications of the three-dimensional Structure, e.g. aircraft interior compartment components and Structure of unmanned aerial vehicles. © Emerald Group Publishing Limited.
