Surface functionalization of carbon nanotubes (CNTs) by biological adhesive polymers carbopol (CP) was developed by simply mixing CNT suspension and an aqueous solution of CP without any toxic solvents. CP can be easily coated onto CNTs through hydrogen bonds OCOH⋯NH₂CO and electrostatic interaction between COO on CP and NH₃⁺ on CNTs. After modification, the surface of the CNT is endowed with a large number of carboxyl groups, which can effectively prevent the reaggregation of CNT by electrostatic repulsion between the ionized carboxyl groups. Hence, highly dispersed functionally modifying CNT by CP (CP‐CNT) filler in polydimethylsiloxane (PDMS) matrix can be obtained. More important, with the help of adhesive properties of CP, the interfacial compatibility between fillers and matrix can also be improved. Thus, the CP‐CNT/PDMS composites exhibited higher dielectric permittivity comparing with CNT/PDMS composites at the same filler content. We present a potential and green approach of surface functionalization of CNT for preparing high‐permittivity polymer composites. J. VINYL ADDIT. TECHNOL., 26:165–172, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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生物粘合剂聚合物卡波姆对碳纳米管的表面功能化，以开发高介电常数的聚合物复合材料

通过简单地将CNT悬浮液和CP水溶液混合而没有任何有毒溶剂，就可以通过生物粘合剂聚合物carbopol（CP）对碳纳米管（CNT）进行表面功能化。CP可以通过氢键OC被容易地涂覆到碳纳米管 OH⋯NH ₂  CO和之间的静电相互作用 COO 上CP和 NH ₃ ⁺在碳纳米管上。改性后，在CNT的表面上具有大量的羧基，这可以有效地防止通过电离的羧基之间的静电排斥而使CNT重新聚集。因此，可以获得通过CP（CP-CNT）填料在聚二甲基硅氧烷（PDMS）基质中高度分散的功能改性CNT。更重要的是，借助于CP的粘合性能，还可以改善填料与基体之间的界面相容性。因此，与相同填料含量的CNT / PDMS复合材料相比，CP-CNT / PDMS复合材料具有更高的介电常数。我们提出了一种用于制备高介电常数聚合物复合材料的CNT表面功能化的绿色方法。J.乙烯基添加物。TECHNOL。，26：165–172，2020.©2019塑料工程师协会