Open AccessPhosphotungstic acid intercalated Zn,Al-layered double hydroxides/ nanocellulose based 3D lightweight foam thermal insulation materials
Author(s) -
Zizhi Huang,
Qiong Wang,
Yongzhong Wu,
Ling Yuan,
Yunchu Hu
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abe061
Subject(s) - fire retardant , materials science , layered double hydroxides , nanocellulose , thermal decomposition , thermal stability , chemical engineering , cellulose , decomposition , hybrid material , phase (matter) , composite number , hydroxide , composite material , organic chemistry , chemistry , nanotechnology , engineering
In this study, [PW 12 O 40 ] 3− anions have been intercalated into Zn,Al-Layered Double Hydroxides(ZnAl-NO 3 -LDHs) to synthesize ZnAl-PW 12 O 40 -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-PW 12 O 40 -LDHs and CNF compound with H 3 BO 3 . The TG showed that ZnAl-PW 12 O 40 - LDHs significantly reduced the maximum decomposition rate and increased the carbon residual rate at 800 °C, which indicated that ZnAl-PW 12 O 40 -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-PW 12 O 40 -LDHs /2%H 3 BO 3 showed best thermal stability and flame-retardant properties, which can be contributed to the decomposition products of ZnAl-PW 12 O 40 -LDHs, acting both as phase flame retardant and condensed phase flame retardant.