Phosphotungstic acid intercalated Zn, Al-layered double hydroxides/ nanocellulose based 3D lightweight foam thermal insulation materials. (12th February 2021)

• Record Type: Journal Article
• Authors: Huang, Zizhi; Wang, Qiong; Wu, Yuanbo; Yuan, Liping; Hu, Yunchu
• Is Part Of: Materials research express. Volume 8:Number 2(2021)
• Publication Date: 2021-02-12
• Subjects: layered double hydroxides -- phosphotungstic acid -- thermal insulation -- flame- retardant properties -- nanocellulose; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/abe061
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: In this study, [PW12 O40 ] 3− anions have been intercalated into Zn, Al-Layered Double Hydroxides(ZnAl-NO3 -LDHs) to synthesize ZnAl-PW12 O40 -LDHs by ion-exchange reaction. The chemical composition and structure were analyzed by XRD, FT-IR, ICP, and SEM. Then, the nanocellulose based 3D lightweight foam thermal insulation materials was prepared by ZnAl-PW12 O40 -LDHs and CNF compound with H3 BO3 . The TG showed that ZnAl-PW12 O40 - LDHs significantly reduced the maximum decomposition rate and increased the carbon residual rate at 800 °C, which indicated that ZnAl-PW12 O40 -LDHs can improve the oxidation resistance of CNF composite materials at high temperature.The fire resistance of different samples were evaluated by back temperature test and alcohol lamp flame test, CNF/50%ZnAl-PW12 O40 -LDHs /2%H3 BO3 showed best thermal stability and flame-retardant properties, which can be contributed to the decomposition products of ZnAl-PW12 O40 -LDHs, acting both as phase flame retardant and condensed phase flame retardant.