Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran.
Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran.
Ultrason Sonochem. 2018 Mar;41:59-66. doi: 10.1016/j.ultsonch.2017.09.025. Epub 2017 Sep 18.
A new poly(benzimidazole-amide) (PBIA) was fabricated by polycondensation of 1,3-bis(5-amino-1H-benzimidazole-2-yl)benzene with chiral diacid under green media by using tetra-n-butylammonium bromide as a cheap commercially available molten ionic salt at 120°C. The affection of reaction time on the polymer yield and viscosity was tested and optimized for PBIA. Inherent viscosity value of the prepared PBIA under optimized conditions is 0.31dL/g. Then to acquire a uniformly dispersion of graphene oxide (GO) in the PBIA matrix, GO was prepared through strong oxidation procedure. After that, GO/PBIA nanocomposites (NCs) with different loading of GO were synthesized through solution mixing method under ultrasonic irradiation and the resulting NCs were characterized by different techniques. Through FE-SEM micrographs and TEM results of NC samples it can be found that the individual GO sheets were good dispersed in the polymer matrix. Also, the thermal properties of the obtained NCs were investigated and the obtained results illustrate high thermal stability with LOI values around 39-41%.
一种新型的聚（苯并咪唑酰胺）（PBIA）是通过在绿色介质中，使用四丁基溴化铵作为廉价的商业可用熔融离子盐，在 120°C 下，由 1,3-双（5-氨基-1H-苯并咪唑-2-基）苯与手性二羧酸缩聚而成的。测试并优化了反应时间对聚合物产率和粘度的影响。在优化条件下，制备的 PBIA 的特性粘度值为 0.31dL/g。然后，为了在 PBIA 基体中获得氧化石墨烯（GO）的均匀分散，通过强氧化程序制备了 GO。之后，通过超声辐射下的溶液混合法合成了具有不同 GO 负载量的 GO/PBIA 纳米复合材料（NCs），并通过不同的技术对所得 NCs 进行了表征。通过 NC 样品的 FE-SEM 微观图和 TEM 结果可以发现，GO 片层在聚合物基体中得到了良好的分散。此外，还研究了所得 NCs 的热性能，所得结果表明其具有较高的热稳定性，LOI 值约为 39-41%。
