Nanocomposites membranes from cellulose nanofibers, SiO2 and carboxymethyl cellulose with improved properties

Jianxin Liu; Pan Chen; Dujian Qin; Shuai Jia; Chao Jia; Lei Li; Hongli Bian; Jie Wei; Ziqiang Shao

doi:10.1016/j.carbpol.2019.115818

Nanocomposites membranes from cellulose nanofibers, SiO₂ and carboxymethyl cellulose with improved properties

Carbohydr Polym. 2020 Apr 1:233:115818. doi: 10.1016/j.carbpol.2019.115818. Epub 2019 Dec 31.

Authors

Jianxin Liu¹, Pan Chen¹, Dujian Qin¹, Shuai Jia¹, Chao Jia², Lei Li¹, Hongli Bian¹, Jie Wei¹, Ziqiang Shao³

Affiliations

¹ Beijing Engineering Research Centre of Cellulose and Its Derivatives, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China.
² State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China.
³ Beijing Engineering Research Centre of Cellulose and Its Derivatives, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China. Electronic address: shaoziqiang@263.net.

PMID: 32059879
DOI: 10.1016/j.carbpol.2019.115818

Abstract

The binary nanocomposites blended by carboxymethyl cellulose (CMC) and SiO₂ nanoparticles were constructed to prepare the films with superior thermal stability and flame retardant properties. The incorporation of cellulose nanofibers(CNFs) and SiO₂ nanoparticles were followed to prepare ternary nanocomposite films exhibiting excellent mechanical properties. The mechanism and chemical reaction of the thermal decomposition for the CMC/SiO₂ composite membrane were proposed, which showed that the mass residuals were Na₂CO₃, SiO₂ and Na₂SiO₃, Na₂CO₃ when the content of the SiO₂ nanoparticles was lowered and higher than 9.6 %, respectively. Compared with the pure CMC, micro combustion calorimeter (MCC) showed that the total heat release (THR) and the peak heat release rate (PHRR) both decreased from 6.4 kJ/g to 5.8 kJ/g, 134 w/g to 27 w/g, respectively. Moreover, mechanical properties of CMC/CNFs/SiO₂ membrane showed that the toughness and rigidity of the nanocomposites increased by 56.0 % and 63.0 % on the basis of CMC, respectively.

Keywords: Cellulose-nanofibers(CNFs); Mechanical performance; SiO(2)nanoparticles; Sodium carboxymethyl cellulose(CMC); Thermal decomposition process.