静电纺定向纳米纤维素-碳纳米管/聚乙烯醇复合纤维导电膜及性能  

Preparation and characterization of cellulose nanocrystal-carbon nanotube/polyvinyl alcohol composite conductive membranes with oriented fibers by electrospinning

作　　者：韩景泉 王思伟 岳一莹 王慧祥 徐信武 HAN Jingquan;WANG Siwei;YUE Yiying;WANG Huixiang;XU Xinwu(College of Materials Science and Engineering,Naniing Forestry University,Nan}ing 210037,China;College of Biology and the Environment,Nanjing Forestry University,Naniing 210037,China)

机构地区：[1]南京林业大学材料科学与工程学院,南京210037 [2]南京林业大学生物与环境学院,南京210037

出　　处：《复合材料学报》2018年第9期2351-2361,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(31770609);中国博士后科学基金等九批特别资助(2016T90466);江苏省高校自然科学研究面上项目(17KJB220007);江苏省第五期"333工程"(2016);江苏高校青蓝工程(2016);浙江省重点研发计划项目(2017C01117);江苏省高等学校大学生创新创业训练计划项目(201510298016Z;201610298004Z);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：利用纤维素纳米晶须(CNCs)搭载碳纳米管(CNTs)在水相中形成均一稳定的纳米CNCs-CNTs导电复合物,并将其均匀分散于聚乙烯醇(PVA)基体中制得纺丝液,采用静电纺丝技术制备纤维定向排列的CNCsCNTs/PVA复合导电膜。结果表明:CNCs-CNTs增强了纤维膜热力学性能,并赋予其导电功能;纤维的定向排列显著提高了膜的力学性能;随CNTs含量增加,纺丝液电导率和黏度提高,纤维直径减小;当CNCs和CNTs与PVA的质量比分别为8.0%和1.0%时,CNCs-CNTs/PVA的纤维直径、拉伸强度和电导率分别可达182nm±35nm、15.99 MPa±1.25 MPa和0.12S/m±0.01S/m;当电流密度为0.2A/g时,其比电容可达127.1F/g,且经过1 500次充放电循环后电容量仍保持在83.14%。基于导电膜优良的力学性能、热稳定性和导电性,CNCsCNTs/PVA导电膜有望应用于可折叠超级电容器、柔性传感器和柔性电极材料等领域。Carbon nanotubes（CNTs）which were carried by cellulose nanocrystals（CNCs）were used to form the uniform CNCs-CNTs conductive complexes in the aqueous phase.The homogeneous spinning solution was prepared by dispersing CNCs-CNTs complexes evenly in polyvinyl alcohol（PVA）matrix.The CNCs-CNTs/PVA conductive composite membranes which consisted of oriented fibers were prepared by electrospinning.The results indicate that CNCs-CNTs complexes can efficiently enhance the thermodynamic properties of the fiber membrane and endow it with conductive function.The orientation of the fibers can significantly improve the mechanical properties of the membrane.With the increasing of CNTs content,the conductivity and viscosity of the spinning solution are increasing while the fiber diameter is decreasing.When the mass ratio of CNCs and CNTs to PVA are 8.0% and 1.0%,the fiber diameter,tensile strength and the conductivity are 182 nm±35 nm,15.99 MPa±1.25 MPa and 0.12 S/m±0.01 S/m,respectively,for CNCs-CNTs/PVA membranes.The specific capacitance can reach 127.1 F/g at the current density of 0.2 A/g,and it can maintain 83.14% of its initial capacity after 1 500 constant-current charge/discharge cycles.Based on its excellent mechanical strength,thermostability and electrical conductivity,the as-prepared CNCs-CNTs/PVA conductive membrane is expected to be used as foldable supercapacitors,flexible sensors and electrode materials.

关 键 词：静电纺丝 纤维素纳米晶须 碳纳米管 导电复合物 电学性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ342.31[化学工程—化纤工业]