Self - Healing thermoplastic films via a small organic photothermal molecule SQ-DIN: mechanism and Fluorescence - Monitored repair

IF 2.8 4区化学 Q3 POLYMER SCIENCE

Journal of Polymer Research Pub Date : 2025-08-06 DOI:10.1007/s10965-025-04503-z

Sixu Wang

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Abstract

The self - healing of damaged polymer matrices by leveraging photothermal properties has been scarcely reported in the literature. In this research, Indole - Based squaraine was synthesized via a facile one - step method. The SQ-DIN molecule is characterized by a symmetrical structural unit. Under 685 - nm laser irradiation, it can rapidly reach a high temperature of 85 °C within just four minutes, demonstrating outstanding photothermal performance. These remarkable photothermal properties of the compound hold great potential for the repair of thermoplastic films damaged by cutting. Given that thermoplastic films melt upon heating, the damaged regions can be reconnected by applying heat. In this study, SQ-DIN was effectively incorporated into a damaged PS-PDMS (polystyrene-polydimethylsiloxane) film. After illumination, the damaged parts of the film showed remarkable self - healing. Moreover, the fluorescence emission of SQ-DIN underwent a substantial change following photothermal stimulation, which enables the detection and identification of damaged films.

Graphical Abstract

Abstract Image

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利用有机光热小分子SQ-DIN自愈热塑性薄膜：机制和荧光监测修复

利用光热特性对受损聚合物基体进行自愈的研究在文献中鲜有报道。本研究采用简便的一步法合成了吲哚基方卡因。SQ-DIN分子具有对称的结构单元。在685 nm激光照射下，仅需4分钟即可迅速达到85℃的高温，表现出优异的光热性能。该化合物的这些显著的光热性能为修复被切割损坏的热塑性薄膜提供了巨大的潜力。考虑到热塑性薄膜在加热时融化，损坏的区域可以通过加热重新连接。在这项研究中，SQ-DIN被有效地掺入到受损的PS-PDMS（聚苯乙烯-聚二甲基硅氧烷）薄膜中。经光照后，薄膜的受损部分表现出显著的自愈性。此外，光热刺激后SQ-DIN的荧光发射发生了很大的变化，从而可以检测和识别受损膜。图形抽象

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来源期刊

Journal of Polymer Research 化学-高分子科学

CiteScore

4.70

自引率

7.10%

发文量

472

审稿时长

3.6 months

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.