Engineering all-aromatic polyamide surface from hydrophilic to superhydrophobic and the accelerated strategy,Journal of Applied Polymer Science

当前位置： X-MOL 学术 › J. Appl. Polym. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Engineering all-aromatic polyamide surface from hydrophilic to superhydrophobic and the accelerated strategy
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-07-01 , DOI: 10.1002/app.51316
Jing Lv ₁ , Longhai Guo ₁ , Chunjie Xie ₂ , Weitong Xu ₁ , Jun Ye ₁ , Xiaoyu Li ₁ , Teng Qiu ₁ , Xinlin Tuo ₂

Affiliation

Being a new kind of nanomaterials, aromatic polyamide nanofibers (ANF) have been much highlighted in recent studies. We here demonstrate an isopropyl alcohol (IPA) accelerated chemical cleavage on poly (p-phenylene terephthalamide) chopped fibers, which provides an efficient preparation method of ANF. The comprehensive study on the processes accelerated by different alcohols revealed that the preparation time of ANF in the mixed medium of dimethyl sulfoxide (DMSO)-alcohol (20:1 in volume) was shorten to 45 min and 75 min for methanol (ethanol) and isopropanol, respectively. However, the nanofibers prepared in DMSO-IPA exhibited the minimum in axial and radial dimensions, providing the finest and most uniform diameter of 16 nm. The corresponding ANF films through vacuum assisted filtration also showed the highest tensile strength of 150 MPa, in comparison with those of the ANF films prepared using other alcohols, which were about 110 MPa. Furthermore, ANF/silicon hybrid films were prepared by the ionic ring-opening reaction followed by the alkoxysilane condensation and nanoparticle fabrication. By changing the organo functional groups in the alkoxysilane, the surface of the films were adjustable in a wide contact angle range from 56° (hydrophilic) to 150° (superhydrophobic), suggesting the amendable interfacial properties potential applicable to composite fabrication with most of the resin matrix.

中文翻译：

将全芳香族聚酰胺表面从亲水性设计为超疏水性和加速策略

作为一种新型纳米材料，芳香聚酰胺纳米纤维（ANF）在最近的研究中备受关注。我们在这里展示了异丙醇 (IPA) 加速了聚 ( p ) 上的化学裂解-亚苯基对苯二甲酰胺）短切纤维，为ANF的制备提供了一种高效的方法。对不同醇类加速过程的综合研究表明，在二甲基亚砜 (DMSO)-醇（体积比为 20:1）混合介质中制备 ANF 的时间缩短至 45 分钟，甲醇（乙醇）和 75 分钟异丙醇，分别。然而，在 DMSO-IPA 中制备的纳米纤维的轴向和径向尺寸最小，提供了 16 nm 的最细和最均匀的直径。通过真空辅助过滤的相应 ANF 薄膜也显示出最高的拉伸强度 150 MPa，而使用其他醇制备的 ANF 薄膜的拉伸强度约为 110 MPa。此外，ANF/硅杂化薄膜是通过离子开环反应、烷氧基硅烷缩合和纳米颗粒制备制备的。通过改变烷氧基硅烷中的有机官能团，薄膜表面可以在 56°（亲水）到 150°（超疏水）的宽接触角范围内调节，这表明适用于复合材料制造的可修改界面特性潜力树脂基体。

更新日期：2021-08-16

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南