Preparation and application of aramid nanofiber via carbodiimide assisted polymerization

IF 4.4 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2024-09-19 DOI:10.1016/j.matdes.2024.113317

Dongmei Zhang , Mingmin Zhang , Xin Su , Yujun Feng

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引用次数: 0

Abstract

Poly (p-phenylene terephthalamide) (PPTA), is well known as a material with excellent properties, but its application is greatly limited due to the harsh methods required for its preparation. This study proposes an innovative carbodiimide-assisted polymerization (CAP) method to simplify the synthesis process of PPTA. The η_inh of the prepared PPTA is 4.97 dl/g. Achieving amidation condensation at normal temperature and pressure, this method is suitable for synthesizing PPTA and allows for the recycling of the condensation reagent, offering a novel approach to green synthesis. Compared to the commercial fiber Kevlar 29, PPTA exhibits similar thermal stability, with negligible decomposition before 500°C. Using the deprotonation method to prepare aramid nanofiber (ANF) resulted in various shapes of bulk materials. The ANF bulk exhibits excellent mechanical properties, with tensile and compressive strengths of 36.9 MPa and 60.68 MPa, respectively, on par with standard engineering materials. Additionally, ANF and PPTA share similar thermal stability. Furthermore, the study prepared aramid nanofiber/partially hydrolyzed polyacrylamide (ANF/HPAM) composite paper, which demonstrated outstanding mechanical performance and thermal stability. The ANF/HPAM composite paper (2% concentration of HPAM) exhibited a tensile strength of 63.32 MPa. These findings offer new insights into developing high-performance fiber materials.

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通过碳二亚胺辅助聚合制备芳纶纳米纤维及其应用

众所周知，聚对苯二甲酰对苯二胺（PPTA）是一种性能优异的材料，但由于其制备方法苛刻，其应用受到很大限制。本研究提出了一种创新的碳化二亚胺辅助聚合（CAP）方法，以简化 PPTA 的合成过程。制备的 PPTA ηinh 为 4.97 dl/g。该方法可在常温常压下实现酰胺化缩合，适用于合成 PPTA，并可回收利用缩合试剂，为绿色合成提供了一种新方法。与商用纤维 Kevlar 29 相比，PPTA 具有相似的热稳定性，在 500°C 之前的分解可以忽略不计。使用去质子化方法制备芳纶纳米纤维（ANF）可得到各种形状的块状材料。ANF 块体具有优异的机械性能，拉伸强度和压缩强度分别为 36.9 兆帕和 60.68 兆帕，与标准工程材料相当。此外，ANF 和 PPTA 具有相似的热稳定性。此外，研究还制备了芳纶纳米纤维/部分水解聚丙烯酰胺（ANF/HPAM）复合纸，该复合纸具有出色的机械性能和热稳定性。ANF/HPAM 复合纸（HPAM 浓度为 2%）的抗张强度为 63.32 兆帕。这些发现为开发高性能纤维材料提供了新的思路。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.