Citation

Chu F, Hou Y, Liu L, Qiu S, Cai W, Xu Z, Song L, Hu W. ACS Appl. Mater. Interfaces 2019; 11(32): 29436-29447.

Copyright

(Copyright © 2019, American Chemical Society)

DOI

10.1021/acsami.9b08734

PMID

31339293

Abstract

It is still a big challenge to prepare polymer/layered double hydroxides (LDHs) composites with high performance, due to the strong agglomeration tendency of LDHs in polymeric matrix. In this study, to avoid the agglomerated situation, the orientated LDH nanosheets were vertically grown on ramie fabric surface, which were then embedded in unsaturated polyester resin (UPR) through the combination method of hand lay-up and vacuum bag. Due to the increased contact area and the restricted interfacial slip in in-plane direction, the hierarchical LDHs-functionalized ramie fabrics (denoted as Textile@LDH) significantly enhanced the mechanical performance of UPR composites. Then, the phosphorus- and silicon-containing coating (PSi) was used for the further improvement of the interfacial adhesion. The tensile strength of UPR/Textile@LDH@PSi composites increased by 121.67%, compared to that of neat UPR. The reinforcement mechanism was studied through analyzing the surface nano/micro-structure and wetting properties of the raw and modified textiles, as well as the interfacial interaction between ramie fabric and UPR. Meanwhile, the thermal stability, thermal conductivity and flame retardant performance of ramie-reinforced UPR composites were improved. Particularly, as-prepared hierarchical Textile@LDH@PSi inhibited the heat release during the combustion process of fabric-reinforced UPR composites, and peak heat release rate (PHRR) and total heat release (THR) values decreased by 36.56% and 47.57% respectively, compared with the neat UPR/Textile composites. The suppression mechanism was further explored by analyzing the microstructure and chemical compositions of char residues. This research paved a feasible solution to improve the poor dispersion of LDHs in polymers, and prepared the high-performance UPR composites with multi-functional applications.

Language: en