硅基碳点/PVA复合材料中光热效应对形状记忆性能增强机制研究

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中图分类号：0482.31 文献标识码：ADOI：10.37188/CJL.20250157 CSTR：32170.14.CJL.20250157

Enhancement Mechanism of Shape Memory Performance by Photothermal Effect in Silicon-based Carbon Dots/PVA Composites

RENWeijie1，LIU Zijiang¹，WANGQingkai¹，XUWenjun 2 ，QIN Zhenxing1 （1.ShanxiCenterofTechnologyInnovationforLightManipulationsandApplications，SchoolofAppliedScience， Taiyuan University of Scienceand Technology，Taiyuan O3oo24，China; 2.ShanxiCongbangConstructionEngineeringCo.，LTD，Taiyuan O3oo32，China） *CorrespondingAuthor，E-mail：qinzx@tyust.edu.cn

Abstract：Shape memory materials，asatypeofintellgent materials thatcanrestore totheirinitialstateunder external stimuli，have showngreat potentialinemerging fieldssuchas flexible electronics，smartpackaging，andbiomedicine.However，theshaperecoveryeficiencyoftraditionalpolyvinylalcohol（PVA）materialsinwateris greatlylimited.This paper reports anovelphoto-responsive shape memory material basedonaPVA/carbon dots composite，which exhibitssuperior shape recovery performance in water compared to pure PVAby combining thecarbon dots with PVA. Theresults obtained here have shown thatthe hydrogen bonds formed between thecarbondots and PVAare an importantfactorinenhancing theshape memory efect.Theintroductionofsiliconelements intothecarbondots significantly improves the shape recovery speed inthecomposite，which isabout threetimes higher than thatof pure PVA.This is duetothesilicon-dopingof thecarbondots significantlyenhancethephotothermalconversioneficiencyofthecomposite material toresultinconverting more solarenergyinto heatundersunlightconditions，thereby，accelerating the movement of molecular chains and achieving rapid shape recovery.Considering that as-prepared composite has the excelent controllable deformation performanceand water-responsive characteristics，This study provides a new idea for thedevelopment of efficient light-thermal-water multi-responsive intelligent materials.

KeyWords：shape memory materials；Si-doped CDs；hydrogen bonds；photothermal conversion

1引言

形状记忆材料（Shape memorymaterials，SMMs）作为一类能够响应外界刺激（如水、光、热等）并实现可控形变的智能材料，在柔性电子、生物医学及智能包装等领域展现出了巨大的应用潜力-3]。（剩余12210字）