大分子受阻酚功能化碳纳米管改性聚氨酯网状泡沫塑料的制备及性能研究  

Preparation and Property study of Polyurethane Reticulated Foam Modified by Macromolecular Hindered Phenol Functionalized Carbon Nanotubes

作　　者：王瑞欣 杨瑞宁 尚磊[2] 张博 WANG Rui-xin;YANG Rui-ning;SHANG Lei;ZHANG Bo(China Institute of Aeronautical Manufacturing Technology,Beijing 100024,China;AVIC Shenyang Aircraft Design&Research Institute,Shenyang 110035,China)

机构地区：[1]中国航空制造技术研究院,北京100024 [2]沈阳飞机设计研究所,辽宁沈阳110035

出　　处：《塑料科技》2024年第9期32-37,共6页Plastics Science and Technology

摘　　要：以γ-氨丙基三甲氧基硅烷(APTMS)修饰的碳纳米管(CNTs)为载体,通过表面引发氧化-还原聚合接枝聚甲基丙烯酸羟乙酯(CNTs-PHEMA),再经酯化反应接枝3,5-二叔丁基-4-羟基苯甲酸(CNTs-PHEMA-g-AO-e),最后以此改性聚氨酯(PU)网状泡沫塑料详细研究了CNTs-PHEMA-g-AO-e对PU网状泡沫塑料表观密度、力学、抗静电和耐老化性能的影响。结果表明:通过表面引发氧化-还原聚合和酯化反应成功制得AO-e接枝率为8%的功能化CNTs,随CNTs-PHEMA-g-AO-e质量分数的增大,网化前后表观密度逐渐增大,密度差先减小后增大,拉伸强度和压缩强度均先增大后减小,压缩永久变形先减小后增大,断裂伸长率明显下降。当CNTs-PHEMA-g-AO-e质量分数为4%时,PU网状泡沫塑料的拉伸强度为262.6 kPa,断裂伸长率为122.7%,定变形65%的压缩强度为8.6 kPa,压缩永久变形为15.6%。与直接添加AO-e的PU网络泡沫塑料相比,CNTs-PHEMA-g-AO-e提升了材料的抗静电性能,体积电阻率下降了10个数量级,同时耐老化性能得到显著增强。Poly(2-hydroxyethyl methacrylate)(PHEMA)was grafted ontoγ-aminopropyl trimethoxysilane(APTMS)functionalized carbon nanotubes(CNTs)by surface-initiated oxidation-reduction polymerization.Then 3,5-di-tert-butyl-4-hydroxybenzoic acid(CNTs-PHEMA-g-AO-e)was grafted by esterification.The effects of CNTs-PHEMA-g-AO-e on the apparent density,mechanical properties,antistatic and aging resistance of polyurethane(PU)reticulated foam were studied in detail.The results showed that functionalized CNTs with grafting rate of AO-e of 8%were successfully prepared by surface-initiated oxidation-reduction polymerization and esterification.With the increase of CNTs-PHEMA-g-AO-e content,the apparent density was gradually increased before and after netting,the density difference was decreased first and then increased,the tensile strength and compressive strength was first increased and then decreased,the compression set was first decreased and then increased,and the elongation at break decreased obviously.When the content of CNTs-PHEMA-g-AO-e was 4%,the tensile strength of PU reticulated foam was 262.6 kPa,the elongation at break was 122.7%,the compressive strength at 65%set deformation was 8.6 kPa and the compression set was 15.6%.Compared with PU network foam directly added with AO-e,the antistatic property was improved,the volume resistivity was decreased by 10 orders of magnitude,and the aging resistance was significantly enhanced in the presence of CNTs-PHEMA-g-AO-e.

关 键 词：碳纳米管 聚氨酯网状泡沫 大分子抗氧剂 抗静电性能 耐老化性能 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]