文档介绍：分类号 TQ016 学校代码 10129
U D C 678 学号 2009207008
多壁碳纳米管的表面修饰及改性脲醛树脂的研究
Studies on Modified Multi-walled Carbon Nanotubes and
Urea-formaldehyde Resin Adhesive

申请人:铁昆灵
学科门类:工学
学科专业:材料加工工程
研究方向:先进复合材料制备技术
指导教师:黄金田教授

论文提交日期:二〇一二年六月

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摘要

碳纳米管以其优异的力学、电学性能成为当前的研究热点,但是表面能大,容
易团聚限制了其广泛应用;脲醛树脂的价格低廉,在人造板行业需求量大,但是胶
接强度差,游离甲醛释放量高;为了解决这些问题,本论文首次将表面修饰后的多
壁碳纳米管作为脲醛树脂的改性剂,用机械共混的方法制备了碳纳米管/脲醛树脂复
合材料,以提高复合材料的综合性能。
(体积比 3:1),在超声波辅助下,对碳纳米管进行酸
化处理;通过 FT-IR,SEM,XRD,TG 分析,发现多壁碳纳米管表面接上了羧基官
能团,原始碳纳米管中的无定型碳,催化剂颗粒杂质几乎被去除,结构没有被破坏。
,研究了十二烷基硫酸钠(SDS)、十六烷基三甲基溴
化铵(CTAB)辅助下酸化处理的碳纳米管在碱性水溶液中的分散情况,发现 SDS
辅助分散的碳纳米管水溶液离心后,浓度值变化最小,说明分散性较好。
,发现碳纳米管的加入
使脲醛树脂的拉伸剪切强度增长了 90%左右;碳管含量对脲醛树脂中游离甲醛的影
响并不大;由 TG 分析可知,与脲醛树脂相比,复合材料的分解速率降低,热稳定
性提高;由 SEM 可知,碳纳米管在脲醛树脂基体中的分散并不均匀。

关键词:多壁碳纳米管;表面修饰;表面活性剂;分散性;脲醛树脂

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Study on Modified Multi-walled Carbon Nanotubes and Urea-formaldehyde
Resin Adhesive

Abstract
Carbon nanotubes (CNTs) e a hot spot of current reasearch due to its excellent
mechanical and electrical properties, Ts tend to agglomerate into bundles because
of high surface energy, which limits their wide application; Urea-formaldehyde (UF)
resin adhesive is a major adhesive in the wood industry, while many mitted to
investigate the methods to e its disadvantades, such as lower bonding strength
and release of free formaldehyde. In this paper, we used mechanical mixing to prepare
multi-walled carbon nanotubes (MWNTs)/UF posites, Ts can
improve the properties posites.
1. MWNTs were treated by concentrated sulfuric acid and nitric acid (Volume ratio
=3:1) with the aid of ultrasonication. Using the anlysis instructment of FT-IR, XRD, TG,
SEM, we found that the structure of MWNTs were not destroyed, carboxylic acid was
introduced on the surface of MWNTs, and there was almost no presence of amorphous
carbons or catalyst particles.
2. The dispersion of modified MWNTs in alkali