摘要
利用纤维素纳米纤丝(Cellulose nanofibers,CNFs)搭载碳纳米管(Carbon nanotubes,CNTs),在水相中将CNF-CNT复合物均匀分散于聚乙烯醇-硼酸盐(PVA-B)基体中,制备具有立体网络结构的CNF-CNT/PVA-B复合导电水凝胶,旨在提高其动态黏弹性、力学强度和导电性能。结果表明:CNF-CNT/PVA-B内部呈现微米级蜂窝状多孔结构,CNFs与CNTs组成的立体网络在显著提高CNF-CNT/PVA-B力学强度和黏弹性的同时还赋予其导电功能。CNTs含量由0增至0.5wt%时,CNF-CNT/PVA-B的抗压强度和弹性模量分别达到24kPa和53kPa,最大和高频稳态剪切模量分别达到7 028Pa和6 945Pa,电导率达到0.8×10-1 S·cm-1。
Cellulose nanofibers loaded with carbon nanotubes （CNF-CNT complexes） were well-dispersed in PVA-borax solution to form electrically conductive composite CNF-CNT/PVA-B hydrogel with a three-dimensional network structure, aiming to enhance the viscoelasticity, stiffness and conductivity of hydrogels. The results show that the micro-scale honeycomb cellular structure exists in CNF-CNT/PVA-B hydrogel. The CNF-CNT complexes form network and enhance viscoelasticity, stiffness and conductivity of hydrogels. When the CNT content is 0.5wt% in CNF-CNT/PVA-B hydrogel, the compressive strength and elastic modulus are 24 kPa and 53 kPa, the maximum and high-frequency plateau of shear modulus are 7 028 Pa and 6 945 Pa, and the conductivity is 0.8×10^-1 S·cm^-1 , respectively.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2017年第10期2312-2320,共9页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(31400505
31770609)
江苏省自然科学基金(BK20140975)
江苏省高校自然科学研究面上项目(14KJB220004)
中国博士后科学基金特别资助(2016T90466)
中国博士后科学基金(2015 M580437)
江苏省博士后科研资助(1501050A)
江苏省第五期"333工程"(2016)
江苏高校青蓝工程(2016)
江苏高校优势学科建设工程(PAPD)
关键词
纳米纤维素
水凝胶
导电率
流变性能
碳纳米管
nanocellulose
hydrogel
conductivity
rheological properties l carbon nanotube
