用三异氰酸酯交联合成柔性聚酰胺气凝胶。

IF 5 3区 化学 Q1 POLYMER SCIENCE
Gels Pub Date : 2024-08-07 DOI:10.3390/gels10080519
Daniel A Scheiman, Haiquan Guo, Katherine J Oosterbaan, Linda McCorkle, Baochau N Nguyen
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引用次数: 0

摘要

使用对苯二甲酰氯 (TPC)、2,2'-二甲基联苯胺 (DMBZ) 合成了一系列新型柔性聚酰胺 (PA) 气凝胶,并用廉价的市售三异氰酸酯 (Desmodur N3300A) 进行交联,聚合物总固体浓度为 6-8 重量%,重复单元 n 为 30-60 个。使用液态二氧化碳进行超临界干燥后,得到的交联 DMBZ 基聚酰胺气凝胶的收缩率为 19-27%,密度范围为 0.12 克/立方厘米至 0.22 克/立方厘米,孔隙率和表面积分别高达 91% 和 309 平方米/克,模量值范围为 20.6 至 109 兆帕。有证据表明,与之前报道的 TPC-mPDA-BTC PA 气凝胶、N3300A-聚酰亚胺气凝胶和 N3300 增强二氧化硅气凝胶相比,使用 DMBZ 作为聚酰胺骨架和 N3300A 作为交联剂可以获得更高的柔韧性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis of Flexible Polyamide Aerogels Cross-Linked with a Tri-Isocyanate.

A new series of flexible polyamide (PA) aerogels was synthesized using terephthaloyl chloride (TPC), 2,2'-dimethylbenzidine (DMBZ) and cross-linked with an inexpensive, commercially available tri-isocyanate (Desmodur N3300A) at polymer concentrations of 6-8 wt.% total solids and repeating units, n, from 30 to 60. The cross-linked DMBZ-based polyamide aerogels obtained, after supercritically drying using liquid CO2, had shrinkages of 19-27% with densities ranging from 0.12 g/cm3 to 0.22 g/cm3, porosity and surface areas up to 91% and 309 m2/g, respectively, and modulus values ranging from 20.6 to 109 MPa. Evidence suggests that a higher flexibility could be achieved using DMBZ in the polyamide backbone with N3300A as a cross-linker, when compared to previously reported TPC-mPDA-BTC PA aerogels, N3300A-polyimide aerogels, and N3300-reinforced silica aerogels.

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来源期刊
Gels
Gels POLYMER SCIENCE-
CiteScore
4.70
自引率
19.60%
发文量
707
审稿时长
11 weeks
期刊介绍: The journal Gels (ISSN 2310-2861) is an international, open access journal on physical (supramolecular) and chemical gel-based materials. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the maximum length of the papers, and full experimental details must be provided so that the results can be reproduced. Short communications, full research papers and review papers are accepted formats for the preparation of the manuscripts. Gels aims to serve as a reference journal with a focus on gel materials for researchers working in both academia and industry. Therefore, papers demonstrating practical applications of these materials are particularly welcome. Occasionally, invited contributions (i.e., original research and review articles) on emerging issues and high-tech applications of gels are published as special issues.
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