Preparation method and application of a degradable marine antifouling polyurethane hybrid material

Abstract

The invention discloses a method for preparing biodegradable ocean antifouling polyurethane hybrid materials and a product thereof. The method for preparing the biodegradable ocean antifouling polyurethane hybrid materials and the product thereof adopt stannous octoate as a catalyst, adopts double hydroxyl functional grapheme which is prepared by adopting reduction grapheme to react with 2, 2-hydroxy benzaldehyde and N-glycine as an initiator, and the initiator triggers L-lactide monomers to prepare graphene grafted poly lactic acids through ring opening polymerization. 1, 4-butanediol and 4, 4-diphenyl methane diisocyanate prepare polyurethane prepolymers containing Isocyanate functional groups on the tail ends through condensation polymerization. The biodegradable ocean antifouling polyurethane hybrid materials are prepared by utilizing a chemical reaction between graphene grafted hydroxyl-terminated poly lactic acids and polyurethane prepolymers. The method for preparing biodegradable ocean antifouling polyurethane hybrid materials and the product thereof improve strength of target materials by leading into grapheme, and the grapheme plays the role of antibacterial function during the degradation process, and control crystallinity and hydrophobic property of grafted poly lactide by adjusting the contents of the grapheme and the L-lactide monomers, thereby effectively adjusting and controlling degradation of polyurethane. hybrid materials which are prepared through the method for preparing biodegradable ocean antifouling polyurethane hybrid materials has excellent mechanical properties and can adjust degradation rate, degradation products are non-toxic and do not pollute the environment, and can be applied in antifouling marine coatings and drug controlled release carriers in a biomedical medical engineering.

Description

technical field [0001] The invention belongs to the technical field of marine antifouling materials, and relates to the preparation and application of a degradable polyurethane hybrid material. Background technique [0002] Graphene (G) is a new type of two-dimensional carbonaceous nanomaterial, which has shown broad application prospects in the fields of materials, chemistry, physics, and electronics. Especially its extremely high mechanical strength and antibacterial function and abundant source make it an ideal filler. By filling the matrix material with graphene, the strength of the matrix material can be improved, and certain functions can also be endowed to the matrix material. Studies have shown that graphene has excellent antibacterial function, such as Francois Perreault et al., who prepared functionalized polyamide / graphene oxide composite film by covalent combination of polyamide film and graphene oxide. The antibacterial performance test shows that this composit...

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Problems solved by technology

(Young H. Lim, GyuSeong Heo, Sangho Cho, Karen L. Wooley. Construction of a reactive diblockcopolymer, polyphosphoesterblock-poly(L-lactide), as a versatile framework for functional materials that are capable of full degradation and nanoscopic assembly formation. ACS Macro Lett.2013, 2, 785-789.) Common biodegradable polyurethane materials include polycaprolactone (PCL), polylactic acid (PLA), etc., but most of them have high crystallization, slow hydrolysis speed, poor adhesion to the substrate, etc. problem, their direct use in marine antifouling materials is limited

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