焦磷酸三聚氰胺与聚乙烯醇分子之间的氢键相互作用提高聚乙烯醇水凝胶薄膜的阻燃性能  

Flame retardant effect of melamine polyphosphate on Polyvinyl alcohol hydrogel film

作　　者：许家友[1] 罗敏仪 吕澍[1] XU Jia-you;LUO Min-yi;LYU Shu(School of Chemistry&Chemical Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学化学化工学院,广东广州510006

出　　处：《广州大学学报（自然科学版）》2024年第2期73-83,共11页Journal of Guangzhou University:Natural Science Edition

基　　金：Major Science and Technology Projects in Foshan(2016AG101374)。

摘　　要：文章通过聚乙烯醇(PVA)与硼酸(H_(3)BO_(3))交联制备成水凝胶薄膜,添加焦磷酸三聚氰胺(MPP)提高PVA/MPP复合水凝胶薄膜的阻燃性能,当添加20 wt%MPP时,PVA阻燃性能达到UL-94 V-0级,MPP的加入可有效降低水凝胶薄膜的热释放速度(HRR)和发烟量。实验结果表明,MPP与PVA分子之间的氢键相互作用可以保持材料的力学性能,提高材料的阻燃性能。PVA/MPP水凝胶膜的阻燃机理是气相与凝聚相阻燃机理的协同作用,MPP分解为三聚氰胺和磷酸,然后三聚氰胺转化为N_(2)和CO_(2),磷酸促进PVA水凝胶形成连续致密的炭层,阻碍了与外界的氧气和热量交换。In this work,Polyvinyl alcohol(PVA)was cross-linked via Boric acid(H_(3)BO_(3))and prepared to be the hydrogel film.MPP is used to improve the flame retardant properties of the PVA hydrogel films.The experimental results showed that the PVA/MPP hydrogel films could achieve UL-94 V-0 rating with a 20 wt%addition of MPP which could effectively reduce the HRR and the smoke emission of the PVA hydrogel films.The flame retardant mechanism of the PVA/MPP hydrogel films is a synergistic effect of gas-phase with condensedphase flame retardant mechanism.MPP decomposed into melamine and phosphoric acid,then melamine converted to N_(2) and CO_(2),Phosphoric acid promoted the PVA hydrogels formation of a continuous and dense char layer which hinders the exchange of oxygen and heat with the outside.At the same time,because of the interaction between MPP and PVA,the mechanical properties of PVA are maintained while the flame retardancy of PVA is improved.

关 键 词：聚乙烯醇 焦磷酸三聚氰胺 凝胶 氢键 阻燃 

分 类 号：TQ314.24[化学工程—高聚物工业]