摘要
以聚偏氟乙烯(PVDF)为基体,以酸化多壁碳纳米管(MWCNTs-COOH)为功能性纳米填料,通过熔融共混法制备了不同MWCNTs-COOH含量的PVDF/MWCNTs-COOH复合材料。分别采用傅立叶变换红外光谱(FTIR)、X射线衍射(XRD),差示扫描量热(DSC),扫描电子显微镜(SEM)、拉伸性能、硬度及维卡软化点温度测试对复合材料结构、微观形貌、力学性能、熔融与结晶行为及耐热性能等进行了测试和表征。FTIR测试表明,MWCNTs被混酸成功酸化成MWCNTs-COOH,有利于增强PVDF与MWCNTs-COOH之间的界面相互作用。XRD测试表明,随着MWCNTs-COOH的加入促进了PVDF的β晶的生成。SEM分析表明,当MWCNTs-COOH质量分数为1.0%时,MWCNTs-COOH被PVDF包覆并均匀地分散到基体中。DSC测试表明,MWCNTs-COOH的加入提升了复合材料的结晶温度、熔融温度和结晶度。当MWCNTs-COOH质量分数为1.0%时,PVDF/MWCNTs-COOH复合材料的拉伸强度可达到60.2MPa,较纯PVDF提高了10.5%,断裂伸长率、邵氏A硬度和维卡软化点温度分别为124%,82.7和161℃。
Polyvinylidene fluoride (PVDF) was used as matrix and acidified multi-walled carbon nanotubes (MWCNTs-COOH) as functional nanomaterials,PVDF/MWCNTs-COOH composites with different MWCNTs-COOH contents were prepared by melt blending. FTIR,XRD,DSC,SEM,tensile properties,hardness and Vicat softening piont temperature test were used to characterize the structure,micro-morphology,mechanical properties,melting-crystallization behavior and heat resistance of the composite. FTIR tests shows that MWCNTs are acidified successfully by mixed acid,which is beneficial to enhance the interfacial interaction between PVDF and MWCNTs-COOH. XRD test reveals that the addition of MWCNT-COOH promotes the formation of βcrystal of PVDF. SEM analysis shows that when the mass fraction of MWCNTs-COOH is 1.0%,MWCNTs-COOH is coated by PVDF and thus homogeneously dispersed into the PVDF matrix. DSC test shows that the addition of MWCNTs-COOH increases the crystallization temperature,melting temperature and crystallinity of the composites. When the mass fraction of MWCNTs-COOH is 1.0%,the tensile strength of PVDF/MWCNTs-COOH composite reaches 60.2 MPa,which is 10.5% higher than that of the pure PVDF. The elongation at break,the Shore A hardness and Vicat softening piont temperature reach 124%, 82.7 and 161℃,respectively.
作者
陈林
郭怡
黄欢
严磊
肖文强
卞军
马素德
Chen Lin;Guo Yi;Huang Huan;Yan Lei;Xiao Wenqiang;Bian Jun;Ma Sude(Key Laboratory of Automobile High Performance Materials & Forming Technology in Sichuan Provincial Universities,School of Materials Science and Engineering, Xihua University, Chengdu 610039, China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2019年第1期38-43,共6页
Engineering Plastics Application
基金
汽车高性能材料及成形技术四川省高校重点实验室开放研究基金项目(SZjj2017-066)
四川省教育厅科研项目(17ZB0422)
国家级大学生创新创业训练计划项目(201810623007
201710623098)
四川省青年科技创新研究团队项目(19CXTD0050)
创新创业环境下"大材料学科"专业综合改革与建设实践教学团队项目(05050028)
关键词
聚偏氟乙烯
多壁碳纳米管
酸化
熔融共混
力学性能
熔融与结晶行为
硬度
耐热性能
polyvinylidene fluoride
multi-walled carbon nanotubes
acidification
melt blending
mechanical property
melting and crystallization behavior
hardness
heat resistance
