Harbin Engineering University

Gaohui Sun

Rongrong Chen

Jun Wang

Qi Liu

Peili Liu

Jiahui Zhu

Jing Yu

Jingyuan Liu

Shihui Han

Yue Sun

Kangkang Tao

Jiawei Tang

A polypyrrole-graphene/polyurethane antifouling coating as well as a preparation method and an application thereof are provided. The polypyrrole-graphene/polyurethane antifouling coating includes component A and component B, wherein the component A mainly includes the following raw materials in parts by weight: 500 parts of group-hydrolyzable polyurethane prepolymer, 25-50 parts of bentonite, 25-50 parts of titanium dioxide, 60-120 parts of zinc oxide, 15-30 parts of talcum powder, and 15-30 parts of polypyrrole-graphene nanofiller; and the component B mainly includes the following raw materials in parts by weight: 5-7 parts of leveling agent, 5-7 parts of defoamer, 6-15 parts of chain extender, 10-25 parts of silane coupling agent, and 1-2 parts of catalyst. The two-component polyurethane coating of the present invention has relatively good adhesion, collision resistance and cracking resistance, and the antifouling property and the antifouling durability can be improved.

Polypyrrole-graphene/polyurethane antifouling coating as well as preparation method and application thereof

A preparation method for thermoplastic multi-hybrid polyimide films is provided. The method includes the following steps: S1, adding an aromatic diisocyanate to an aromatic dianhydride solution system to obtain an anhydride-terminated polyimide precursor solution containing a seven-membered ring structure named a first solution; S2, adding an aromatic dianhydride to an aromatic diamine solution system to obtain an amino-terminated polyamic acid solution named a second solution; S3, mixing the first solution and the second solution to obtain a uniform multi-polymerization solution; S4, after extending the multi-polymerization solution to form a film, carrying out a gradient heating curing in a vacuum oven and an ordinary oven respectively to obtain a thermoplastic multi-hybrid polyimide film after cooling. The invention prepares a thermoplastic multi-hybrid polyimide film with better comprehensive performance rapidly, the preparation process is simple, and the production cost is effectively reduced.

Preparation method for thermoplastic multi-hybrid polyimide films

A polypyrrole-coated graphene corrosion inhibitor container and its preparation method and a composite coating and its application are provided. The polypyrrole encapsulated graphene corrosion inhibitor container includes graphene oxide and a polyvinylo layer encapsulated on the surface of the graphene oxide. The invention is based on a polymerization reaction by mixing a polypyrrole acid solution, a graphene oxide dispersion, and an initiator to obtain a polypyrrole encapsulated graphene corrosion inhibitor container. The polypyrrole encapsulated graphene corrosion inhibitor container regulates the release rate of the corrosion inhibitor by wrapping the polypyrrole around the graphene oxide so that it is released rapidly in alkaline solutions and at a slower rate in neutral media. The results of the practical example show that the polypyrrole encapsulated graphene corrosion inhibitor container can regulate the release rate of the corrosion inhibitor and has excellent corrosion protection properties and corrosion protection durability.

Polypyrrole encapsulated graphene corrosion inhibitor container and its preparation method and composite coating and its application

Growing community of inventors

Harbin, China

Gaohui Sun