【作者】 刘春宁；

【导师】 李侃社； 周安宁；

【作者基本信息】 西安科技大学 ， 材料学， 2005， 硕士

【摘要】 煤基聚苯胺（CBP）与通用聚合物的复合是实现聚苯胺应用的一个有效途径。大分子的有机功能磺酸对煤基聚苯胺掺杂改性,可提高煤基聚苯胺电导率,改善其热稳定性、加工性、环境友好性及与基体树脂的相容性。 采用乳液聚合原位掺杂成功制备了十二烷基苯磺酸（DBSA）掺杂态煤基聚苯胺（CBP-DBSA）,应用 FTIR、XRD、TG、SEM 等手段表征了不同态煤基聚苯胺的结构与性能。结果表明:搅拌速度 2000r/min,APS 滴加速率 1.1mmolAPS/min,煤粉/苯胺用量比 7.75g/5mlAn,聚合温度 15℃,聚合时间 24h,苯胺浓度 0.36mol/l,洗涤滤液 pH=3,n（APS）∶n（An）=1.2,n（DBSA）∶n（An）=1.0,制得的CBP-DBSA电导率可达0.954S/cm;在低于 260℃范围内,CBP-DBSA 的热稳定性比无外加酸 CBP 有所提高。 煤基聚苯胺掺杂-脱掺杂过程的研究证明:原位聚合引入的外加酸与煤表面的酸性基团（-COOH、-OH 等）对聚苯胺具有协同掺杂作用;煤基聚苯胺的掺杂（HCl、DBSA等）-脱掺杂（NH3·H₂O、NaOH 等）不完全可逆。 应用熔融共混技术成功制备了聚合物/CBP-DBSA 复合材料,通过电导率、力学性能测定,FTIR、TG 分析以及拉伸断面的 SEM 观察,研究了复合材料的结构与性能。结果表明:通用聚合物可与 CBP-DBSA 共混复合,从而提高基体材料的电学性能;与LDPE 相比而言,EVA 与 CBP-DBSA 的氢键作用可改善两相的界面相容性,EVA 是与CBP-DBSA 共混制备抗静电材料较好的匹配基体。随着 CBP-DBSA 用量增加,复合材料的力学性能逐渐下降,而其电导率呈上升趋势,并呈现较低的导电逾渗阈值:EVA/CBP-DBSA 为 7%,LDPE/CBP-DBSA 为 13%;CBP-DBSA 填加量相同时,前者电导率比后者高出 2⁵ 个数量极,而且力学性能较好;CBP-DBSA 质量分数为 13%时,EVA/CBP-DBSA 复合材料的拉伸强度为 21.49MPa,断裂伸长率为 287.73%,电导率达到 4.78×10-9 S/cm,该材料具有抗静电功能,且环境稳定性良好。更多还原

【Abstract】 The blend of Coal-based Polyaniline（CBP） and current polymer is a effective approach of polyaniline（PAn） application. Adopting organic functional sulfonic acids to dope and modify CBP, the conductivity of CBP can be enhanced, at the same time, thermal stability、processing、compatibility with resin、environmental amity nature are also improved. CBP-DBSA was prepared successfully by the means of emulsion polymerization in-situ doped; moreover, in virtue of FTIR、XRD、TG and SEM testing measures, configuration and performances of CBP in different forms were researched. The results indicate: velocity of whisk 2000r/min, adding velocity of APS 1.1mmolAPS/min, coal/An mass ratio 7.75g/5mlAn, polymerization temperature 15℃, polymerization time 24h, An monomer concentration 0.36mol/l, pH value of filtrate 3, n（APS）∶n（An）=1.2,n（DBSA）∶n（An）=1.0, conductivity of CBP-DBSA in-situ doped is up to 0.954S/cm. Under 260℃, thermal stability of CBP-DBSA is better than CBP without added acids. Research of CBP doping-dedoping course prove: added acids introduced by in-situ polymerization and acidic groups（-COOH、-OH） in the surface of coal play cooperating doped action on PAn; Course of CBP doping（HCl、DBSA） and dedoping（NH3·H₂O、NaOH） is incompleted reversible. Polymer/CBP-DBSA composites were prepared successfully by melting processing. By mensuration of conductivity and mechanics performance, analysis of FTIR and TG, and SEM observation of stretching section, configuration and performances of composites were researched. The results show: current polymer and CBP-DBSA can be blended, and electricity performance of matrix resin is enhanced; be compared to LDPE, hydrogen bond action between EVA and CBP-DBSA can improve interface compatibility of two phases, EVA is a kind of better matching matrix, EVA and CBP-DBSA can be blended to prepare anti-static composites. With increase of CBP-DBSA content, mechanics performance of composites are gradually declined, but conductivity present rised trend and have lower conductive threshold: EVA/CBP-DBSA 7%, LDPE/CBP-DBSA 13%; When CBP-DBSA content are same, conductivity of EVA/CBP-DBSA are higher above 2⁵ magnitude than of LDPE/CBP-DBSA, and mechanics performance of EVA/CBP-DBSA are also preferable. When mass fraction of CBP-DBSA is 13%, tensile strength of EVA/CBP-DBSA is 21.49MPa, elongation at break 287.73%, conductivity 4.78×10-9 S/cm, composite has anti-static function, and its environmental stability is better.更多还原