Fabrication of a mechanically tough and strong graphene oxide aerogel modified phenolic resin by balancing the trade-off between load transfer efficiency and chain segment mobility

被引：6

作者：

Lei, Zixuan ^{[1
]}

Wang, Jian ^{[1
]}

Zhang, Chi ^{[2
]}

Li, Jian ^{[3
]}

Liu, Yuhong ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Dept Chem Engn, Xian 710049, Shaanxi, Peoples R China

[2] Xian Polytech Univ, Sch Environm & Chem Engn, Dept Chem Engn, Xian 710048, Shaanxi, Peoples R China

[3] Xian Aerosp Composite Mat Res Inst, Xian 710025, Shaanxi, Peoples R China

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2022年 / 152卷

基金：

中国国家自然科学基金;

关键词：

A; Thermosetting resin; B; Microstructures; Mechanical properties; FRACTURE-TOUGHNESS; CARBON NANOTUBES; STRESS TRANSFER; STRENGTH; DESIGN; FILLER; NANOPARTICLES; DISPERSION; ADHESION; ALCOHOL);

D O I：

10.1016/j.compositesa.2021.106701

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, a mechanically strong and tough novolac phenolic nanocomposites (GESNH) was successfully constructed by modulating its load transfer efficiency and chain segment mobility with reactive micro-sized graphene oxide aerogel (GES). DMA analysis reveals that the microstructure of GESNH can be divided into three regions including the "bricks in mortar" structure, the main phenolic networks and the constrained region, according to the significant difference in glass transition temperature (Tg) and fractional free volume (fg). Via controlling the volume fraction of three regions, load transfer efficiency and chain segment mobility of GESNH can be effectively tuned. Especially for 0.5%GESNH-5, flexural, tensile properties and fracture toughness are increased by 44.71%, 60.41% and 96.34%, compared with those of 0.5%GNH, where the volume fraction of the "bricks in mortar" structure as 0.086 and the constrained region as 0.169 facilitate the load transfer and the chain segment mobility, simultaneously.

引用

页数：11