Abstract
A zeolite imidazole framework (ZIF-67) was assembled onto the surface of ammonium polyphosphate (APP) for preparing a series multifunctional flame-retardant APP-ZIFs. The assembly mechanism, chemical structure, chemical compositions, morphology, and specific surface area of APP-ZIFs were characterized. The typical APPZ1 and APPZ4 were selected as intumescent flame retardants with dipentaerythritol (DPER) because of their superior unit catalytic efficiency of cobalt by thermogravimetric analysis. APPZ1 and APPZ4 possessed 6.8 and 92.1 times the specific surface area of untreated APP, which could significantly enhance the interfacial interaction, mechanical properties, and migration resistance when using in ethylene-vinyl acetate (EVA). With 25% loading, 25% APPZ4/DPER achieved a limiting oxygen index value of 29.4% and a UL 94 V-0 rating, whereas 25% APP/DPER achieved a limiting oxygen index value of only 26.2% and a V-2 rating, respectively. The peak of the heat release rate, smoke production rate, and CO production rate respectively decreased by 34.7%, 39.0%, and 40.1%, while the char residue increased by 91.7%. These significant improvements were attributed to the catalytic graphitization by nano cobalt phosphate and the form...Continue Reading
References
Aug 24, 2011·ACS Applied Materials & Interfaces·Bibo WangYuan Hu
Sep 21, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Ja-Min GuSeong Huh
Nov 11, 2011·Chemical Reviews·Lauren E KrenoJoseph T Hupp
May 15, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Chun-Yi SunEn-Bo Wang
Dec 29, 2015·Journal of the American Chemical Society·Haoquan ZhengXiaodong Zou
Mar 4, 2017·Materials Science & Engineering. C, Materials for Biological Applications·Azlin F OsmanRafiza Ramli
May 17, 2017·Chemical Science·Ye-Tang PanDe-Yi Wang
Aug 10, 2017·Journal of Controlled Release : Official Journal of the Controlled Release Society·Christian SchneiderDirk Hair
Feb 14, 2018·ACS Applied Materials & Interfaces·Yanbei HouYuan Hu
Mar 1, 2018·ACS Applied Materials & Interfaces·Yiliang WangJianwei Hao
Aug 3, 2018·ACS Applied Materials & Interfaces·Qiang LiaoYuan Tong
Dec 21, 2018·Angewandte Chemie·Qihao YangHai-Long Jiang
Jan 25, 2019·ACS Applied Materials & Interfaces·Ying-Ming LiYu-Zhong Wang
Apr 10, 2019·Polymers·Feipeng LouWeihong Guo
Oct 24, 2019·ACS Applied Materials & Interfaces·Xia ZhouYuan Hu