Acid-assisted strategy towards reuse of waste polyimide materials for multi-scenario thermally insulating and high-strength functional applications

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-06-14 DOI:10.1016/j.surfin.2025.106946

Yuhang Zhuang , Meixin Chen , Zehang Du , Shiying Chen , Kailai Xia , Liuyan Li , Ronglong Ye , Xiaolin Lyu , Zhixing Lu , Mingmao Wu

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引用次数: 0

Abstract

Polyimide (PI) has attracted significant attention due to its outstanding comprehensive properties. However, its rigid molecular structure and chemical inertness pose challenges for the effective reuse of waste PI, causing environmental concerns and resource depletion. In this work, we present an acid-assisted sulfonation approach to efficiently reuse waste PI materials. The sulfonated PI (SPI) dispersion produced by this method can be readily processed with water-soluble polymers. For example, the fabricated SPI/sodium alginate composite fibers demonstrate impressive tensile strength (162 MPa) and thermal insulation properties. Furthermore, the resulting SPI/reduced graphene oxide aerogels exhibit a unique combination of high fatigue resistance, low thermal conductivity (0.0276 W m⁻¹ K⁻¹) and excellent sensing performance. These findings confirm that this method offers an effective route for repurposing waste PI into value-added products that meet the needs of different specific application scenarios, contributing to sustainable economic development.

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酸辅助策略对废聚酰亚胺材料的多场景隔热和高强度功能应用的再利用

聚酰亚胺（PI）因其优异的综合性能而备受关注。然而，其刚性的分子结构和化学惰性给废弃PI的有效再利用带来了挑战，引起了环境问题和资源枯竭。在这项工作中，我们提出了一种酸辅助磺化方法来有效地再利用废弃的PI材料。该方法制备的磺化PI （SPI）分散体可以很容易地用水溶性聚合物进行加工。例如，制备的SPI/海藻酸钠复合纤维具有令人印象深刻的抗拉强度（162 MPa）和隔热性能。此外，得到的SPI/还原氧化石墨烯气凝胶具有高抗疲劳性、低导热系数（0.0276 W m−1 K−1）和优异的传感性能的独特组合。这些研究结果证实，该方法为将废弃PI转化为满足不同特定应用场景需求的增值产品提供了有效途径，有助于经济的可持续发展。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)