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公开(公告)号：US20200248010A1
公开(公告)日：2020-08-06
申请号：US16853675
申请日：2020-04-20
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Chaobin He , Siew Yes Wong
Abstract: The present invention relates to a method for forming a layered silicate/polymer composite, the composite comprising individual exfoliated silicate layers separated in a continuous polymer matrix, wherein the polymer is a hydrophobic polymer, the method comprising: exfoliating sheet silicate in water to form a silicate suspension; replacing the water in the silicate suspension by an organic solvent to form a silicate/organic solvent suspension; contacting the silicate/organic solvent suspension with a solution of a hydrophobic polymer precursor in an organic solvent to form a silicate/polymer precursor suspension; coating the silicate/polymer precursor suspension on a substrate; removing the organic solvents; curing the hydrophobic polymer precursor of the coating of the silicate/polymer precursor; and annealing the cured coating to form the layered silicate/polymer composite on the substrate.
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公开(公告)号：US10689497B2
公开(公告)日：2020-06-23
申请号：US16273075
申请日：2019-02-11
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Yu Yuan Chieng , Siew Yee Wong , Xikui Zhang
IPC: C09D133/08 , C08J7/04 , C08F20/06 , C08F2/44 , C09D4/06 , C09D133/02
Abstract: This invention relates to a a one-step process for making a polymer composite suspension for coating plastic films characterized in that a first polymer is synthesized in-situ optionally in the presence of other polymers and in the presence of clay. Preferably the polymer composite suspension comprises a) 1.0 to 11.0 wt % of clay or silane modified clay, b) 0.1 to 10.0 wt % of poly (acrylic acid), which is a copolymer of acrylic acid (AA) with at least one other monomer selected from 2-ethylhexyl acrylate (EHA), β-carboxyethyl acrylate (β-CEA), methacrylamidoethyl ethylene urea (WAM II) and ethoxylated behenyl methacrylate (β-EM), c) 1.0 to 15.0 wt % of other polymers, preferably poly (vinyl alcohol) and d) 70 to 97 wt % of water or mixture of water with 2-propanol. The coating films made from the suspensions show good barrier capabilities against water vapor and oxygen can be used to make barrier layers on or within plastic films for packaging applications. The invention also relates to methods for making silane modified clay usable in the process for making the suspensions.
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公开(公告)号：US20190020028A1
公开(公告)日：2019-01-17
申请号：US16069707
申请日：2017-01-16
Applicant: Agency for Science, Technology and Research
Inventor： Suxi Wang , Xu Li , Andy Hor , Zhongxing Zhang , Kia Jia Benny Chew
Abstract: According to the present disclosure, a method of fabricating a metal-carbon fibrous structure is provided. The method comprises the steps of: (a) forming a fibrous support structure comprising composite nanocrystals and polymeric fibers, wherein each of the composite nanocrystals comprises metal ions connected by organic ligands; (b) growing the composite nanocrystals on the fibrous support structure; and (c) subjecting the fibrous support structure of step (b) to carbonization to form the metal-carbon fibrous structure, wherein the metal-carbon fibrous structure comprises metal nanoparticles derived from the composite nanocrystals comprising metal organic framework (MOF), particularly zeolitic imidazolate framework (ZIF). A metal-carbon fibrous structure comprising carbon based fibers arranged to form a porous network and the carbon based fibers are doped with metal nanoparticles, wherein the carbon based fibers have surfaces which comprise graphitic carbon, is also disclosed herein.
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14.发明申请公开(公告)号：US20180155540A1
公开(公告)日：2018-06-07
申请号：US15729475
申请日：2017-10-10
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Chao Bin He , Haiwen Gu , Siew Yee Wong , Shilin Chen
IPC: C08L63/00 , C08J3/00 , C08K7/14 , C08K9/06 , C08J5/10 , C08L77/02 , C01B33/44 , C08J3/20 , C08J5/08
CPC classification number: C08L63/00 , C01B33/44 , C08J3/005 , C08J3/203 , C08J5/08 , C08J5/10 , C08J2363/00 , C08J2377/02 , C08K7/14 , C08K9/06 , C08L77/02 , C08L2314/00
Abstract: A method of preparing a fiber-reinforced polymer composite is provided. The method includes (a) providing a swollen clay material; (b) chemically modifying a surface of the swollen clay material with an organosilane to form a silane-modified clay material; (c) intercalating the silane-modified clay material with a binder to form an intercalated clay material; and (d) melt compounding the intercalated clay material with a mixture comprising a polymer and fiber to form the fiber-reinforced polymer composite. A fiber-reinforced polymer composite is also provided.
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公开(公告)号：US09803079B2
公开(公告)日：2017-10-31
申请号：US14653846
申请日：2013-12-18
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Chao Bin He , Haiwen Gu , Siew Yee Wong , Shilin Chen
IPC: C08L63/00 , C01B33/44 , C08K9/06 , C08J5/10 , C08K7/14 , C08J3/00 , C08L77/02 , C08J5/08 , C08J3/20
CPC classification number: C08L63/00 , C01B33/44 , C08J3/005 , C08J3/203 , C08J5/08 , C08J5/10 , C08J2363/00 , C08J2377/02 , C08K7/14 , C08K9/06 , C08L77/02 , C08L2314/00
Abstract: A method of preparing a fiber-reinforced polymer composite is provided. The method includes (a) providing a swollen clay material; (b) chemically modifying a surface of the swollen clay material with an organosilane to form a silane-modified clay material; (c) intercalating the silane-modified clay material with a binder to form an intercalated clay material; and (d) melt compounding the intercalated clay material with a mixture comprising a polymer and fiber to form the fiber-reinforced polymer composite. A fiber-reinforced polymer composite is also provided.
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Patent Agency Ranking
公开(公告)号：US20170240424A1
公开(公告)日：2017-08-24
申请号：US15329829
申请日：2015-07-29
Inventor： Aled Deakin Roberts , Suxi Wang , Haifei Zhang , Xu Li
IPC: C01B31/02 , H01M4/583 , H01M10/0525
CPC classification number: H01M10/0525 , B01J20/20 , B01J20/305 , B01J20/3078 , B01J20/3085 , C01B32/00 , C01B32/05 , H01G11/26 , H01G11/34 , H01G11/86 , H01M4/583 , H01M4/587 , H01M4/926 , H01M8/0234 , H01M10/052 , H01M2004/027 , Y02C10/08 , Y02E60/13 , Y02T10/7022
Abstract: A method of preparing a porous carbon material is provided. The method comprises a) freezing a liquid mixture comprising a polymer suspended or dissolved in a solvent to form a frozen mixture; b) removing the solvent from the frozen mixture to form a porous frozen mixture; and c) pyrolyzing the porous frozen mixture to obtain the porous carbon material. A porous carbon material prepared using the method, and uses of the porous carbon material are also provided.
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公开(公告)号：US12134667B2
公开(公告)日：2024-11-05
申请号：US18076186
申请日：2022-12-06
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Yu Yuan Chieng , Siew Yee Wong , Xikui Zhang
Abstract: This invention relates to a a one-step process for making a polymer composite suspension for coating plastic films characterized in that a first polymer is synthesized in-situ optionally in the presence of other polymers and in the presence of clay. Preferably the polymer composite suspension comprises a) 1.0 to 11.0 wt % of clay or silane modified clay, b) 0.1 to 10.0 wt % of poly (acrylic acid), which is a copolymer of acrylic acid (AA) with at least one other monomer selected from 2-ethylhexyl acrylate (EHA), β-carboxyethyl acrylate (β-CEA), methacrylamidoethyl ethylene urea (WAM II) and ethoxylated behenyl methacrylate (β-EM), c) 1.0 to 15.0 wt % of other polymers, preferably poly (vinyl alcohol) and d) 70 to 97 wt % of water or mixture of water with 2-propanol. The coating films made from the suspensions show good barrier capabilities against water vapor and oxygen can be used to make barrier layers on or within plastic films for packaging applications. The invention also relates to methods for making silane modified clay usable in the process for making the suspensions.
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公开(公告)号：US20240301212A1
公开(公告)日：2024-09-12
申请号：US18663173
申请日：2024-05-14
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Yu Zhang , Ming Yan Tan
IPC: C09C3/06 , A01N25/12 , A01N59/00 , A01P1/00 , B01J21/06 , B01J21/08 , B01J35/39 , C03C12/02 , C03C17/25 , C09C1/00 , C09D5/32 , C09D5/33 , C09D7/40 , C09D7/62
CPC classification number: C09C3/063 , A01N25/12 , A01N59/00 , A01P1/00 , B01J21/063 , B01J21/08 , B01J35/39 , C03C12/02 , C03C17/256 , C09C1/0078 , C09D5/004 , C09D5/32 , C09D7/62 , C09D7/70 , C01P2002/82 , C01P2002/84 , C01P2004/03 , C01P2004/04 , C01P2004/20 , C01P2004/84 , C03C2217/71 , C03C2217/74 , C03C2218/111 , C03C2218/32
Abstract: A method of forming a titania-coated inorganic particle comprising the steps of: (a) agitating a mixture of inorganic particle and organic solvent; (b) adding titania precursor dropwise into the mixture of step (a) under agitation; and (c) adding catalyst to the mixture of step (b) thereby converting said titania precursor to titania which then forms a coating on said inorganic particle; wherein steps (a) to (c) are performed at neutral pH and ambient temperature.
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公开(公告)号：US11814535B2
公开(公告)日：2023-11-14
申请号：US18114947
申请日：2023-02-27
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Yu Zhang , Ming Yan Tan , Siew Yee Wong , Xi Kui Zhang
IPC: C09D133/14 , C08F292/00 , C08F2/44 , C08F2/18 , C08K5/14 , C08K5/5425 , C08K9/04 , C08K3/34 , C08F220/18
CPC classification number: C09D133/14 , C08F2/18 , C08F2/44 , C08F220/1808 , C08F292/00 , C08K3/346 , C08K5/14 , C08K5/5425 , C08K9/04 , C08F220/1806
Abstract: A method of synthesizing a polymeric clay composition for coating. A clay-polyacrylate composite is produced, where the clay-polyacrylate composite includes one or more layers of clay intercalated with polyacrylate, where the one or more layers of clay include at least one organosilane coupling agent including an acrylate moiety, where the at least one organosilane coupling agent is attached to a surface of the one or more layers of clay and the polyacrylate is covalently attached to the organosilane coupling agent, and where the polyacrylate consists of a first acrylate monomer and a second acrylate monomer having different solubility, where the first acrylate monomer is a hydrophilic acrylate monomer including a hydroxyl (—OH) group and the second acrylate monomer is a hydrophobic acrylate monomer which repels water. Furthermore, the clay-polyacrylate composite is mixed with a solution including a polymer to form the polymeric clay composition.
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公开(公告)号：US11590476B2
公开(公告)日：2023-02-28
申请号：US16994216
申请日：2020-08-14
Applicant: Agency for Science, Technology and Research
Abstract: A method of producing a porous carbon composite fibrous mats formed of a network of carbon fibers incorporated with porous carbon particles. The method includes electrospinning a polymer solution to form a porous layer of polymeric fibers and the polymeric fibers are doped with a precursor of conductive metal particles, wherein the polymer solution includes a polymer and the precursor of the conductive metal particles, electrospraying a metal organic framework suspension onto the porous layer of polymeric fibers, wherein the metal organic framework suspension includes metal organic framework particles, repeating the electrospinning and electrospraying in an alternating manner to form a porous network of polymeric fibers incorporated with the metal organic framework particles, and heating the porous network of polymeric fibers incorporated with the metal organic framework particles to form the porous carbon composite fibrous mats. The porous carbon composite fibrous mats and its applications thereof are also disclosed herein.
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