摘要
首先利用棉纤维通过硫酸水解法制备纤维素纳米晶,再采用原位化学氧化法,在纤维素纳米晶表面进行吡咯的原位聚合,成功制得包裹聚吡咯的纤维素纳米晶复合导电材料。结果表明:聚吡咯纤维素纳米晶复合导电材料表现出核壳结构,纤维素纳米晶与聚吡咯间存在较强的相互作用力,有利于聚吡咯均匀地包覆纤维素纳米晶;有机掺杂剂(DBSNa)由于分子体积大,降低了分子间作用力,其电导率低于无机掺杂剂NaCl,但是热稳定性和比电容好于NaCl,并且显著提高了复合体系的电化学容量。研究结果可为超级电容器的研究提供参考。
A cellulose nanocrystalline suspension was first obtained from cotton fibers by a modified acid hydrolysis method, and then the conductive composites were prepared through in situ chemical oxidative polymerization of pyrrole monomers on the surface of cellulose nanofibers. The characterization of the resulting composites indicated the composites possessed a good core-shell structure, and the interaction between polypyrrole and nanocellulose crystal was beneficial to the even coating of polypyrrole on the surface of the nanocellulose crystals. It also demonstrated that organic dopant, such as DBSNa, reduced the intermolecular forces due to the large molecular weight and exhibited lower conductivity but better thermal stability and specific capacitance, compared with those of inorganic dopant such as NaC1. Furthermore, the electrochemical capacity of the conductive polypyrrole-nanocellulose crystal composites have been significantly improved, thus providing some reference for the research of super-capacitors.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2013年第10期15-19,共5页
Journal of Textile Research
关键词
纤维素纳米晶
聚吡咯
导电复合材料
掺杂剂
电化学特性
nanocellulose crystal
polypyrrole
conductive composite
dopant
electrochemical property
