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1、I阳离子型两亲无规共聚物对聚吡咯/纤维导电纸的掺杂作用阳离子型两亲无规共聚物对聚吡咯/纤维导电纸的掺杂作用摘 要 采用原位聚合法在天然纤维基体上合成聚吡咯（PPy），可制成均匀的聚吡咯/天然纤维复合材料。这种复合材料既具有聚吡咯的导电性，又具有纤维的特性，因此是很有展前景的抗静电包装材料和电磁波屏蔽材料。本文采用红外（IR）、扫描电镜（SEM）对其结构和形态进行了表征，采用X-射线电子能谱（XPS）对其表面的元素种类及含量进行分析，采用热重分析（TGA）和电阻率测试仪对其热稳定性和导电性进行了研究。探讨了不同的自制掺杂剂对复合材料各方面性能的影响。研究表明：（1）通过原位吸附化学氧化聚合法采用
2、自制的CPSD共聚物为掺杂剂，以三氯化铁为氧化剂，制备出聚吡咯（PPy）/天然纤维复合导电纤维，并将其通过传统的造纸工艺制备成系列导电纸（CF）。聚吡咯均匀地包覆于天然纤维表面，由于天然纤维是多孔性材料，所以聚吡咯也渗入到了纤维内部，使天然纤维的表面结构发生了变化。（2）FTIR和XPS研究表明CPSD3掺杂剂分子已经掺杂进CF中的聚吡咯的分子结构上。XPS研究表明CF3导电纤维表面有很多N元素聚集，说明大量的聚吡咯包覆吸附在导电纤维表面。（3）NF原纸和导电纸CF的外观图片及SEM的观测结果表明通过原位化学氧化聚合法制备得到的复合导电纤维CF3表面完全被聚集的聚吡咯吸附包覆。天然纤维经过吡咯
3、的原位化学氧化聚合改性后，其颜色由白色变为黑色。（4）热重（TG）分析结果表明吸附在导电纤维CF上的聚吡咯影响着CF的热稳定性。（5）在固定吡咯和掺杂剂用量的条件下，以CPSD3作为掺杂剂得到的导电纸的导电性最好，其表面电阻率降低至26 k/square。（6）导电纸的力学性能分析表明经聚吡咯改性后，导电纸的力学性能会明显下降，纸张的抗张指数从原纸的40 kNmkg-1下降到导电纸CF3的22 kNmkg-1。关键词：聚吡咯、掺杂剂、导电纸、复合材料Cationic amphiphilic random copolymer of poly pyrrole / fiber doped condu
4、ctive paper roleABSTRACTIn situ polymerization synthesis of natural fiber substrate polypyrrole (PPy), can be made uniform polypyrrole / natural fiber composites.This composite material not only has the characteristics of conductive polypyrrole, but also has the characteristics of the fiber,therefor
5、e,it can be very promising anti-static packaging materials and electromagnetic shielding materials.In this paper, FTIR and SEM characterized its structure and morphology,the surface element stype and content were analyzed by XPS,thermal gravimetric analysis (TGA) and resistivity tester characterized
6、 its thermal stability and conductivity.The effects of different dopants on homemade composite impact of all aspects of performance .The studie show that : (1)By in situ chemical oxidation polymerization and adsorption homemade CPSD copolymers dopant to ferric chloride as the oxidant , successfully
7、prepared polypyrrole (PPy) / natural fiber composite conductive fiber , and through traditional preparation of the paper-making process into a series of conductive paper (CF).Polypyrrole uniformly coated on the surface of natural fibers , the natural fiber is a porous material, so polypyrrole also l
8、eak into the inside of the fiber , the surface of the natural fiber structure has changed.(2) FTIR and XPS studies show CPSD3 dopant molecules have been doped into CF in the molecular structure of polypyrrole.(3)Paper NF and conductive paper CF appearance of images and SEM observations showed that b
9、y in situ chemical oxidation polymerization of the obtained composite conductive fiber aggregation CF3 surface is completely coated with polypyrrole adsorption .Natural fibers through chemical oxidative polymerization of pyrrole in situ modification , its color from white to black.(4)Thermogravimetr
10、ic analysis (TG) The results indicated that the adsorption on the conductive polypyrrole fiber CF affect the thermal stability .(5)Under the condition of fixed dosage of pyrrole and dopant,CPSD3 as a dopant for the conductive paper the electrical conductivity is the best.(6)The mechanical properties of conductive paper analyzes showed that modified by polypyrrole conductive paper will be significantly decreased the mechanical properties.Keywords: Polypyrrole ,the dopant , conductive paper ,composite materials