公开(公告)号：US11987014B2

公开(公告)日：2024-05-21

申请号：US17423257

申请日：2019-01-15

申请人： SOOCHOW UNIVERSITY

发明人： Aijuan Gu ,  Guozheng Liang ,  Li Yuan

IPC分类号： B29C70/62 ,  B29C35/08 ,  B29K105/16 ,  B29K507/04 ,  B29K509/02 ,  B29L9/00 ,  C08J3/28 ,  C08J5/04 ,  C08J5/24 ,  C08L63/00

CPC分类号： B29C70/62 ,  B29C35/0805 ,  C08J3/28 ,  C08J5/047 ,  C08J5/242 ,  C08J5/243 ,  C08L63/00 ,  B29C2035/0855 ,  B29K2105/167 ,  B29K2507/04 ,  B29K2509/02 ,  B29L2009/00 ,  C08J2363/00 ,  C08J2479/02

摘要： This invention disclosed a resin-based composite material has a three-layer structure and the application thereof. According to the invention, an oriented carbon nanotube bundle/epoxy resin composite material (denoted as layer B) is prepared with the microwave curing method, a barium titanate nanofiber/epoxy resin composite material (denoted as layer E) is prepared by means of a blade coating-heat curing method, and a composite material of a B-E-B three layer structural is formed by means of a layer-by-layer curing technology. Compared to the composite material of the conductor-insulating layer/polymer layer structural prepared in the prior art, the resin-based composite material has a three-layer structure provided by the invention has with high energy storage density, and low dielectric loss and high permittivity; and the preparation process therefor is controllable and easy to operate, short in production cycle, and suitable for large-scale application.

公开(公告)号：US11981783B2

公开(公告)日：2024-05-14

申请号：US17398285

申请日：2021-08-10

申请人： SOOCHOW UNIVERSITY

发明人： Aijuan Gu ,  Guozheng Liang ,  Li Yuan

IPC分类号： C08J5/18 ,  C08G18/12 ,  C08G18/38 ,  C08G18/44 ,  C08G18/66 ,  C08G18/75

CPC分类号： C08J5/18 ,  C08G18/12 ,  C08G18/3863 ,  C08G18/44 ,  C08G18/66 ,  C08G18/755 ,  C08J2375/04

摘要： A method for preparing a transparent flexible polyurethane film includes the following steps: (1) mixing a hydroxyl-terminated polyalkylene carbonate diol, a diisocyanate compound, 2,2′-dithiodiethanol, dibutyltin dilaurate and a chloroalkane solvent, and then reacting at 40 to 60° C. for 0.5 to 3 h to obtain an isocyanate-terminated oligomer solution; and (2) adding a polyol cross-linking agent, a bistrifluoromethanesulfonimide lithium salt and a 1-ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt to the isocyanate-terminated oligomer solution, reacting at 40 to 60° C. for 0.5 to 1.5 h, removing the chloroalkane solvent to obtain the transparent flexible polyurethane film.

公开(公告)号：US11898303B2

公开(公告)日：2024-02-13

申请号：US17052903

申请日：2018-05-10

申请人： SOOCHOW UNIVERSITY

发明人： Aijuan Gu ,  Hua Cai ,  Guozheng Liang ,  Li Yuan

IPC分类号： D06M11/38 ,  D06M11/36 ,  D06M11/80 ,  D06M13/513 ,  D06M15/61 ,  D06M101/36

CPC分类号： D06M11/38 ,  D06M11/36 ,  D06M11/80 ,  D06M13/513 ,  D06M15/61 ,  D06M2101/36

摘要： The present invention relates to a surface-modified aramid fiber and a method for preparing the same. The method includes the following steps: modifying an aramid fiber having amino groups and carboxyl groups on the surface with siloxane γ-glycidoxypropyltrimethoxysilane to obtain a silicon methoxylated aramid fiber; reacting same with a cerium oxide coated with polydopamine modified chaotic boron nitride to obtain a surface-modified aramid fiber. The cerium oxide coated with polydopamine modified chaotic boron nitride has high ultraviolet absorption, and has extremely low catalytic activity, avoiding the damage to a fiber structure by photocatalysis during radiation, being an effective, safe and highly-efficient ultraviolet absorber. The surface-modified aramid fiber provided in the present invention has an ultraviolet-resistant function, high surface activity, good thermal performance, and better mechanical performance, providing excellent overall performance, and having higher utilization value. The method is simple and controllable, being suitable for large scale production.

公开(公告)号：US11739067B2

公开(公告)日：2023-08-29

申请号：US17003569

申请日：2020-08-26

申请人： SOOCHOW UNIVERSITY

发明人： Guozheng Liang ,  Youhao Zhang ,  Aijuan Gu ,  Li Yuan

IPC分类号： C07D327/00 ,  C08J7/04

CPC分类号： C07D327/00 ,  C08J7/0423 ,  C08J2363/00

摘要： Superhydrophobic electrothermal epoxy composites, their preparation and a self-healing method are disclosed. 1,4,5-oxadithiepane-2,7-dione and methylhexahydrophthalic anhydride were mixed and cured with epoxides to get self-healable epoxy resins; carbon nanotube/self-healable epoxy resin prepolymers were coated on self-healable epoxy resins and cured to get electrothermal epoxy composites; modified superhydrophobic copper powders were adhered on electrothermal epoxy composites and cured to get a kind of superhydrophobic electrothermal epoxy composites. The thermal resistance of superhydrophobic electrothermal epoxy composites is superior to existed technical solutions and they can simultaneously repair cracking and delamination and the healed samples still exhibit excellent superhydrophobicity. These merits of superhydrophobic electrothermal epoxy composites provided in this invention can meet the harsh requirements of self-healing and removing ice on surfaces of wind turbine blades, suggesting good abilities of guaranteeing service safety and lifespan of wind turbine blades.

公开(公告)号：US11193000B2

公开(公告)日：2021-12-07

申请号：US16759327

申请日：2018-02-27

申请人： SOOCHOW UNIVERSITY

发明人： Guozheng Liang ,  Youhao Zhang ,  Aijuan Gu ,  Li Yuan

IPC分类号： C08J11/12 ,  C07D327/00 ,  C08G59/42

摘要： This invention provides a self-healable epoxy resin and its preparation, recycling and remolding method. With the catalyst of potassium iodide, an ester solution of 2-mercaptoacetic acid was oxidated by 30% H2O2 to form 2,2′-dithiodiacetic acid; then 2,2′-dithiodiacetic acid was dehydrated and cyclizated by anhydride to form 1,4,5-oxadithiepane-2,7-dione; 1,4,5-oxadithiepane-2,7-dione and methylhexahydrophthalic anhydride were mixed by mass ratio and cured with epoxides to get the self-healable epoxy resin. Through controlling dynamic and permanent three-dimensional crosslinked network, the self-healable epoxy resins provided in this invention exhibit high thermal resistance and improved mechanical properties as well as excellent self-healing ability, recyclability and remoldability. This invention provides a preparation method with the merits of low cost, simple production processes, broad application prospects and strong utility.

公开(公告)号：US10822278B2

公开(公告)日：2020-11-03

申请号：US16068848

申请日：2016-11-29

申请人： SOOCHOW UNIVERSITY

发明人： Guozheng Liang ,  Longhui Zheng ,  Aijuan Gu ,  Pengfei Zhang ,  Li Yuan

IPC分类号： C04B35/00 ,  C04B35/468 ,  C04B41/83 ,  C04B41/48 ,  C04B41/00 ,  C01G23/00 ,  C04B35/626 ,  C04B38/06 ,  C04B111/00

摘要： Disclosed are a barium titanate foam ceramic/thermosetting resin composite material and a preparation method therefor. An organic additive is used as an auxiliary; deionized water is used as a solvent; nanometer barium titanate is used as a ceramic raw material; and all of same are mixed and ground so as to form a slurry with a certain solid content. A pre-treated polymer sponge is impregnated into the slurry for slurry coating treatment, and then redundant slurry is removed and the polymer sponge is dried so as to obtain a barium titanate foam ceramic blank, and same is then sintered so as to obtain a barium titanate foam ceramic. A resin, being in a molten state and thermosettable, submerges the pores of the barium titanate foam ceramic, and a barium titanate foam ceramic/thermosetting resin composite material is obtained after a thermosetting treatment.

公开(公告)号：US10738144B2

公开(公告)日：2020-08-11

申请号：US16314907

申请日：2016-12-03

申请人： SOOCHOW UNIVERSITY

发明人： Aijuan Gu ,  Jiatao Miao ,  Guozheng Liang ,  Li Yuan

IPC分类号： C08F222/40 ,  C09K21/14 ,  C08G73/10

摘要： Disclosed are a flame-retardant bismaleimide resin and a preparation method thereof comprising: forming an eugenol salt suspensoid from a whole biomass eugenol in the present of a strong alkali metal base, adding dropwisely a solution of phosphorus oxychloride in methyl chloride to react to obtain a biomass-based phosphate flame-retardant; mixing bismaleimide, 2,2′-diallylbisphenol with the obtained phosphate, curing and posttreating to obtain the flame-retardant bismaleimide resin. Compared with petroleum-based bismaleimide resin, the flame-retardant bismaleimide resin prepared by the present invention is obtained from eugenol derived from biomass, and the raw material is green and renewable. It maintains mechanical properties and processing properties of the petroleum-based bismaleimide resin and has an excellent flame-retardant property. The preparation method provided by the invention has the advantages of low cost and simple production process, and has wide application prospect in the fields of aerospace, electronic information, electrical insulation and the like.