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公开(公告)号：US11542347B2
公开(公告)日：2023-01-03
申请号：US16892269
申请日：2020-06-03
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Yu Yuan Chieng , Siew Yee Wong , Xikui Zhang
IPC: C09C1/42 , C09C3/12 , C08F20/06 , C08F2/44 , C09D4/06 , C09D133/02 , C08J7/04 , C08J7/043 , C08J7/048
Abstract: This invention relates to 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-FM), 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：US20220089881A1
公开(公告)日：2022-03-24
申请号：US17420262
申请日：2020-01-21
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Yu Zhang , Ming Yan Tan
IPC: C09C3/06 , C09C1/00 , C03C12/02 , C09D7/62 , C09D7/40 , C09D5/32 , C09D5/33 , B01J35/00 , B01J21/06 , B01J21/08 , A01N59/00 , A01N25/12 , A01P1/00 , C03C17/25
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：US20210296648A1
公开(公告)日：2021-09-23
申请号：US17223347
申请日：2021-04-06
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. 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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公开(公告)号：US20210179813A1
公开(公告)日：2021-06-17
申请号：US16755619
申请日：2018-10-25
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Siew Yee Wong
IPC: C08K7/26 , C09D127/08 , C08K5/541 , C08K3/34
Abstract: The present disclosure relates to a barrier layer composition comprising at least one silicate, a polymer emulsion and at least two silane coupling agents. The present disclosure also provides a method of preparing the barrier layer composition as disclosed herein. Advantageously, the barrier layer composition of the present disclosure exhibits low permeability toward gas and water vapor molecules. As such, the present invention also relates to a laminated film comprising a substrate deposited with the barrier layer composition as disclosed herein.
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公开(公告)号：US11008473B2
公开(公告)日：2021-05-18
申请号：US16853675
申请日：2020-04-20
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Chaobin He , Siew Yee 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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Patent Agency Ranking
公开(公告)号：US20200171457A1
公开(公告)日：2020-06-04
申请号：US16614191
申请日：2018-05-15
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Chin Chong Ray Yap , Jiating He , Siew Yee Wong
Abstract: A method of forming one or more composite structures is provided wherein one or more carbon structures is formed from a carbon source via a hydrothermal process. Said carbon source is a biomass material including glucose and glucosamine hydrochloride. In particular, the method further comprises introducing a seeding additive of potassium or phosphate salt, preferably monopotassium phosphate to the carbon source. The method includes introducing iron onto the carbon structures to form the one or more composite structures including carbon and iron.
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公开(公告)号：US10128503B2
公开(公告)日：2018-11-13
申请号：US14890410
申请日：2014-05-12
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Chao Bin He , Suxi Wang , Siew Yee Wong , Shilin Chen
IPC: H01M4/04 , H01M4/587 , D01D5/00 , D04H1/4242 , D04H1/728 , D01F9/24 , H01M4/133 , D01F9/17 , D01F11/12 , H01M4/1393 , H01M4/36 , H01M4/62 , H01M4/02
Abstract: There is provided a conductive fibrous material comprising a plurality of carbonaceous fibers, wherein each carbonaceous fiber is fused to at least one other fiber. The carbonaceous fibers may be fused at fiber-to-fiber contact points by a polymer. The process of making the conductive fibrous material comprises mixing a phenolic polymer with a second polymer to form a polymer solution, preparing phenolic fibers having nano- or micro-scale diameters by electrospinning the polymer solution, and subsequent carbonization of the obtained phenolic fibers, thereby generating carbonaceous fibers, wherein each carbonaceous fiber is fused to at least one other fiber. The conductive fibrous material may be useful in electrode materials for energy storage devices.
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公开(公告)号：US11814534B2
公开(公告)日：2023-11-14
申请号：US18114458
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 clay-polyacrylate composite. An aqueous solution including clay is mixed with at least one organosilane coupling agent including an acrylate moiety to form a silanized-clay suspension. The silanized-clay suspension is contacted with a first acrylate monomer and a second acrylate monomer in an inert environment, where the first acrylate monomer and the second acrylate monomer have different solubility. A polymerization initiator is added to the silanized-clay suspension before or during the contacting of the silanized-clay suspension with the first acrylate monomer and the second acrylate monomer in the inert environment to form the clay-polyacrylate composite including the first and second acrylate monomer, 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.
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公开(公告)号：US11646418B2
公开(公告)日：2023-05-09
申请号：US17223347
申请日：2021-04-06
Applicant: Agency for Science, Technology and Research
Inventor： Suxi Wang , Xu Li , Andy Hor , Zhongxing Zhang , Kia Jia Benny Chew
IPC: H01M4/587 , D01D5/00 , D01F1/10 , D01F9/22 , B82Y30/00 , D04H3/002 , D04H3/03 , H01M10/0525 , H01M4/62 , H01M4/02
CPC classification number: H01M4/587 , B82Y30/00 , D01D5/003 , D01F1/10 , D01F9/22 , D04H3/002 , D04H3/03 , H01M10/0525 , D10B2101/12 , D10B2321/10 , D10B2401/16 , H01M4/625 , H01M2004/027
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. 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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公开(公告)号：US20220305455A1
公开(公告)日：2022-09-29
申请号：US17427407
申请日：2020-01-31
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Jiating He
Abstract: There is provided a composite material comprising a porous silica particle, a plurality of metal particles disposed within the pores of said silica particle and a polymeric coating that at least partially encapsulates said silica particle. There is also provided a method of preparing a composite material, comprising the step of mixing a solution containing a plurality of activated metal and silica particles with a polymer solution to thereby form said composite material, wherein said composite material comprises a porous silica particle, a plurality of metal particles disposed within the pores of said silica particle and a polymeric coating that at least partially encapsulates said silica particle.
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