DES-Engineered Bioinspired Wood Scaffolds with Fluorescence and Thermal Storage

IF 4.7 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2025-07-03 DOI:10.1021/acsapm.5c01771

Xinyu Wu, Dingmeng Guo, Hailan Lian* and Changyan Xu,

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引用次数: 0

Abstract

Carbon-based quantum dots (CQDs) demonstrate quantum-enhanced photothermal conversion through bandgap-engineered light absorption, enabling efficient energy harvesting in phase change composites. This study proposes a method for delignin and functionalizing carbon dots with DES where delignified basswood-derived cellulose scaffolds provide anisotropic thermal transport channels, while polyethylene glycol (PEG) matrices functionalized with CQDs establish photon-electron-thermal coupling pathways. The engineered composite achieves congruent phase transition thermodynamics at 59.5 °C with latent heat storage capacity (163.2 J/g) comparable to pure PEG. The composite demonstrates exceptional thermoresponsive sensitivity (0.98%/°C, R² = 0.977) with 40% fluorescence attenuation at 70 °C, suggesting CQDs’ surface defect states as effective thermal probes through temperature-modulated electron–hole pair recombination kinetics. These fundamental insights establish structure–property relationships for next-generation phase change materials with integrated energy storage and optical sensing functionalities.

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具有荧光和储热功能的des工程仿生木材支架

碳基量子点（CQDs）通过带隙工程光吸收展示了量子增强光热转换，实现了相变复合材料的高效能量收集。本研究提出了一种用DES进行脱木质素和功能化碳点的方法，其中脱木质素的低音木衍生纤维素支架提供了各向异性的热传输通道，而用CQDs功能化的聚乙二醇（PEG）基质建立了光子-电子-热耦合途径。该工程复合材料在59.5°C时实现了完全的相变热力学，其潜热储存容量（163.2 J/g）与纯PEG相当。该复合材料表现出优异的热响应灵敏度（0.98%/°C, R2 = 0.977），在70°C时荧光衰减40%，表明CQDs表面缺陷态通过温度调制的电子-空穴对重组动力学作为有效的热探针。这些基本见解为具有集成能量存储和光传感功能的下一代相变材料建立了结构-性能关系。

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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.