Composite sepiolite/chitosan layer-by-layer coated flexible polyurethane foams with superior mechanical properties and energy absorption

被引：11

作者：

Ji, Wenfei ^{[1
]}

Zhang, Qicheng ^{[2
]}

Alvarez-Borges, Fernando ^{[3
]}

Yuan, Guanjie ^{[4
]}

Van Duijneveldt, Jeroen ^{[1
]}

Briscoe, Wuge H. ^{[1
]}

Scarpa, Fabrizio ^{[2
]}

机构：

[1] Univ Bristol, Sch Chem, Bristol BS8 1TS, England

[2] Univ Bristol, Bristol Composites Inst, Bristol BS8 1TR, England

[3] Univ Southampton, VIS X Ray Imaging Ctr, Southampton SO17 1BJ, England

[4] Univ Bristol, Sch Phys, Bristol BS8 1TL, England

来源：

COMPOSITE STRUCTURES | 2023年 / 322卷

基金：

欧洲研究理事会; 英国工程与自然科学研究理事会;

关键词：

Polyurethane foam; Layer -by -layer assembly; Energy dissipation; Stiffness; Damping; Nanocomposite coatings; FLAME-RETARDANT; PU FOAMS; PERFORMANCE; WEIGHT; SPONGE; FTIR;

D O I：

10.1016/j.compstruct.2023.117419

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Flexible polyurethane foam composites with enhanced stiffness and energy dissipation have been prepared via a facile layer-by-layer assembly approach. The composite foams consisted of naturally abundant nanoclay/chitosan multilayers (up to six) deposited onto the foam struts via dip-coating. The nanoclay/chitosan polyurethane foams were characterised using infrared spectroscopy, scanning electron microscopy, elemental mapping and & mu;-CT scanning. Quasi-static mechanical compression of the foams with 6 bilayers showed a 202% increase in the stiffness and a 33% enhancement in the damping loss factor compared to the uncoated pristine foam. Vibration transmissibility tests showed that the dynamic modulus of the 6-bilayer coated foams was 3 times that of the pristine foam. Remarkably, impact tests registered a 50% decrease in the transmitted impact force of these sepiolite/chitosan layer-by-layer coated open cell polyurethane foams, demonstrating their improved energy dissipation capability compared to other nanocoated foams in open literature.

引用

页数：9

共 48 条

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