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.

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.

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.

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

IPC: C09D7/61 ,  C08K9/08 ,  C09D1/04 ,  B82Y40/00 ,  C09D1/00 ,  C08K3/34

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.

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

IPC: B01J20/02 ,  B01J20/20 ,  B01J20/22 ,  B01J20/28 ,  B01J20/30

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.

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.