Effect of Carboxymethyl Cellulose(CMC) Functionalization on Dispersion, Mechanical, and Corrosion Properties of CNT/Epoxy Nanocomposites  

作　　者：Da-Wei Zhang Leonard Chia Ying Huang 

机构地区：[1]Department of Civil,Construction and Environmental Engineering,North Dakota State University,Fargo 58108,USA

出　　处：《Chinese Journal of Polymer Science》2023年第8期1277-1286,I0010,共11页高分子科学（英文版）

基　　金：financially supported by the National Science Foundation(No.CMMI-1750316)。

摘　　要：Carbon nanotube(CNT)/epoxy nanocomposites have a great potential of possessing many advanced properties.However,the homogenization of CNT dispersion is still a great challenge in the research field of nanocomposites.This study applied a novel dispersion agent,carboxymethyl cellulose(CMC),to functionalize CNTs and improve CNT dispersion in epoxy.The effectiveness of the CMC functionalization was compared with mechanical mixing and a commonly used surfactant,sodium dodecylbenzene sulfonate(Na DDBS),regarding dispersion,mechanical and corrosion properties of CNT/epoxy nanocomposites with three different CNT concentrations(0.1%,0.3%and 0.5%).The experimental results of Raman spectroscopy,particle size analysis and transmission electron microscopy showed that CMC functionalized CNTs reduced CNT cluster sizes more efficiently than Na DDBS functionalized and mechanically mixed CNTs,indicating a better CNT dispersion.The peak particle size of CMC functionalized CNTs reduced as much as 54%(0.1%CNT concentration)and 16%(0.3%CNT concentration),compared to mechanical mixed and Na DDBS functionalized CNTs.Because of the better dispersion,it was found by compressive tests that CNT/epoxy nanocomposites with CMC functionalization resulted in 189%and 66%higher compressive strength,224%and 50%higher modulus of elasticity than those with mechanical mixing and Na DDBS functionalization respectively(0.1%CNT cencentration).In addition,electrochemical corrosion tests also showed that CNT/epoxy nanocomposites with CMC functionalization achieved lowest corrosion rate(0.214 mpy),the highest corrosion resistance(201.031Ω·cm^(2)),and the lowest porosity density(0.011%).

关 键 词：CNT/epoxy composites Carboxymethyl cellulose DISPERSION Mechanical properties Corrosion properties 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]