原位聚合法制备聚吡咯包覆型导电纸的工艺与机理研究
发布时间：2018-10-18 13:05
【摘要】： 本论文在纸浆纤维悬浮液体系中通过原位聚合法制备了聚吡咯包覆型导电纸,研究了吡咯单体浓度、掺杂剂的种类和用量对导电纸导电性能的影响,并通过ATR-FTIR, XPS, SEM-EDXA, SEM以及AFM分析揭示了相关机理。 研究发现吡咯单体浓度、掺杂剂的种类和用量对导电纸的导电性能有重要影响。 吡咯单体浓度增加时,导电纸的表面电阻率不断下降。吸附率的实验测定结果显示,吡咯单体浓度增加时,纸浆纤维上包覆的聚吡咯也不断增加,这是导电纸表面电阻率降低的一个重要原因。SEM观察结果表明吡咯单体浓度增加时,聚吡咯颗粒直径增大。XPS和SEM-EDXA的N元素的分析结果与吸附率测定结果一致；但掺杂水平(S/N)先下降后上升。 对本论文所用的大多数磺酸类掺杂剂,吡咯单体与掺杂剂物质的量之比为1：1时制备的导电纸导电性能最优。对甲苯磺酸(PTSA)和十二烷基苯磺酸(DBSA)的掺杂效果要优于相应的钠盐。对掺杂剂PTSA, PTSA-Na, NSA和AQSA-Na而言,相同实验条件下NSA和AQSA-Na掺杂时生成的聚吡咯要多于PTSA和PTSA-Na。SEM-EDXA和XPS的结果分析都表明掺杂剂分子已经掺杂进聚吡咯的分子结构中；NSA,AQSA-Na制备的聚吡咯掺杂水平要高于PTSA-Na和PTSA制备的聚吡咯。XPS的元素价态分析表明NSA, AQSA-Na制备的聚吡咯的高掺杂水平跟纤维与聚吡咯分子链较强的相互作用有关。SEM和AFM的观测结果表明NSA和AQSA-Na掺杂的聚吡咯颗粒尺寸要远大于PTSA和PTSA-Na制备的聚吡咯,且分布更为均匀。
[Abstract]:In this paper, polypyrrole coated conductive paper was prepared by in-situ polymerization in pulp fiber suspension system. The effects of concentration of pyrrole monomer, type and amount of dopant on conductive properties of conductive paper were studied. The related mechanism was revealed by ATR-FTIR, XPS, SEM-EDXA, SEM and AFM analysis. It was found that the concentration of pyrrole monomer, the type and amount of dopant had an important effect on the conductivity of conductive paper. When the concentration of pyrrole monomer increased, the surface resistivity of conductive paper decreased. The experimental results show that the polypyrrole coated on the pulp fiber increases with the increase of the concentration of pyrrole monomer, which is an important reason for the decrease of the surface resistivity of conductive paper. The results of SEM observation show that the concentration of pyrrole monomer increases with the increase of the concentration of pyrrole monomer. The diameter of polypyrrole particles increased. The results of N element analysis of XPS and SEM-EDXA were consistent with the results of adsorption rate, but the doping level (S / N) decreased first and then increased. For most of the sulfonic acid dopants used in this paper, the conductive paper prepared at 1:1 with the ratio of pyrrole monomer to dopant is the best. The doping effect of p-toluenesulfonic acid (PTSA) and dodecyl benzenesulfonic acid (DBSA) was better than the corresponding sodium salt. For PTSA, PTSA-Na, NSA and AQSA-Na, the polypyrrole produced by NSA and AQSA-Na doping is more than that by PTSA, PTSA-Na.SEM-EDXA and XPS under the same experimental conditions. The results show that the dopant molecules have been doped into the molecular structure of polypyrrole. The doping level of polypyrrole prepared by NSA,AQSA-Na is higher than that of polypyrrole prepared by PTSA-Na and PTSA. The element valence state analysis of XPS shows that the high doping level of polypyrrole prepared by NSA, AQSA-Na is related to the strong interaction between the fiber and the molecular chain of polypyrrole. The results show that the size of polypyrrole particles doped with NSA and AQSA-Na is much larger than that of polypyrrole prepared by PTSA and PTSA-Na. And the distribution is more uniform.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：TS761.2
本文编号：2279212
[Abstract]:In this paper, polypyrrole coated conductive paper was prepared by in-situ polymerization in pulp fiber suspension system. The effects of concentration of pyrrole monomer, type and amount of dopant on conductive properties of conductive paper were studied. The related mechanism was revealed by ATR-FTIR, XPS, SEM-EDXA, SEM and AFM analysis. It was found that the concentration of pyrrole monomer, the type and amount of dopant had an important effect on the conductivity of conductive paper. When the concentration of pyrrole monomer increased, the surface resistivity of conductive paper decreased. The experimental results show that the polypyrrole coated on the pulp fiber increases with the increase of the concentration of pyrrole monomer, which is an important reason for the decrease of the surface resistivity of conductive paper. The results of SEM observation show that the concentration of pyrrole monomer increases with the increase of the concentration of pyrrole monomer. The diameter of polypyrrole particles increased. The results of N element analysis of XPS and SEM-EDXA were consistent with the results of adsorption rate, but the doping level (S / N) decreased first and then increased. For most of the sulfonic acid dopants used in this paper, the conductive paper prepared at 1:1 with the ratio of pyrrole monomer to dopant is the best. The doping effect of p-toluenesulfonic acid (PTSA) and dodecyl benzenesulfonic acid (DBSA) was better than the corresponding sodium salt. For PTSA, PTSA-Na, NSA and AQSA-Na, the polypyrrole produced by NSA and AQSA-Na doping is more than that by PTSA, PTSA-Na.SEM-EDXA and XPS under the same experimental conditions. The results show that the dopant molecules have been doped into the molecular structure of polypyrrole. The doping level of polypyrrole prepared by NSA,AQSA-Na is higher than that of polypyrrole prepared by PTSA-Na and PTSA. The element valence state analysis of XPS shows that the high doping level of polypyrrole prepared by NSA, AQSA-Na is related to the strong interaction between the fiber and the molecular chain of polypyrrole. The results show that the size of polypyrrole particles doped with NSA and AQSA-Na is much larger than that of polypyrrole prepared by PTSA and PTSA-Na. And the distribution is more uniform.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：TS761.2
【引证文献】
相关期刊论文 前1条
1 王海花;胡锦娟;费贵强;冷翠婷;;磺酸盐型水性聚氨酯/聚吡咯导电材料的原位制备与电阻性能[J];功能材料;2012年22期
相关硕士学位论文 前1条
1 陈宇;PEDOT/纸浆纤维原位复合制备导电纸的研究[D];东北林业大学;2012年
，本文编号：2279212
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