首页|具有光热-发电及光热-抗菌效应的木质素基复合膜的制备与研究

具有光热-发电及光热-抗菌效应的木质素基复合膜的制备与研究

Preparation and Study of Lignin-based Composite Films with Photothermal-Engergy Generation and Photothermal-Antibacterial Performances

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利用具有优异光热性能的木质素磺酸钠(LSS)为原料,与具有局域表面等离子体共振效应的金纳米粒子(AuNPs)通过原位共混策略制备出具有协同光热效应的LSS/PVA@Au复合膜材料.在复合膜中,LSS的结构上的功能基团对Au3+起到分散、稳定、螯合和还原作用.AuNPs的引入使得LSS50/PVA50@Au l复合膜的表面更加粗糙,平均粗糙度为30.3 nm,但是在紫外到近红外区具有更强更宽的吸收谱带.LSS含量的提高有助于材料光热性能的增强,LSS50/PVA50复合膜的最高温度可升至(120.6±3.1)℃.利用AuNPs的协同光热效应,LSS50/PVA50@Aul复合膜的温度最高可以达到(190.1±3.5)℃,光热转换效率为42.47％.不仅如此,该复合膜材料也具有光热-发电效应,利用TEG可以将吸收的热量转换为电能,在5个太阳光照射下LSS50/PVA50@Aul产生的电压最高为(280.8±4.6)mV,电流为(48.9±1.9)mA.而由于对近红外光(NIR)良好的光响应性,该复合膜同样具有良好的抗菌性能,在1.47W/cm2NIR照射10min后,对大肠杆菌和金黄色葡萄球菌的杀菌率可以达到99.5％和99.2％.本研究利用具有π-π共轭结构的LSS与具有LSPR效应的AuNPs相结合,通过原位共混策略制备出LSS/PVA@Au复合材料可以将储量丰富的、高效、清洁、绿色的太阳能资源转化为可以利用储存的电能,同时该材料也具有光热-抗菌的效果.
Sodium lignosulfonate(LSS)with good photothermal property and gold nanoparticles(Au NPs)with excellent localized surface plasmon resonance(LSS)were used as raw materials to fabricate LSS/PVA@Au composite films with synergistic photothermal effect through in situ blending strategy.During the preparation process,the functional groups on the LSS structure play an important role in dispersing,stabilizing,chelating and reducing Au3+.The existence of Au NPs makes the surface of the LSS/PVA@Au composite film rougher,with an average roughness of 30.3 nm,which also endows its stronger and wider absorption in the ultraviolet to near infrared region.The increase of LSS content is beneficial to the enhancement of photothermal property of the LSS/PVA composite material.The maximum temperature of the LSS50/PVA50 composite film can reach(120.6±3.1)℃ with thermal conversion efficiency of 27.61％under standard 5 sun irradiation.Benefiting from the synergistic photothermal effect of Au NPs,the highest temperature of(190.1±3.5)℃ can be attained for LSS50/PVA50@Aul composite film with thermal conversion efficiency of 42.47％.A thermoelectric generator are powered by LSS50/PVA50 and LSS50/PVA50@Aul composite films successfully,which can convert the heat absorbed into electric energy.The maximum voltage generated by LSS50/PVA50@Aul is(280.8±4.6)mV and the corresponding current is(48.9±1.9)mA under standard 5 sun irradiation.Due to the good photo-responsiveness to near infrared light(NIR),the LSS50/PVA50@Aul composite film also show satisfactory photothermal antibacterial performance.After 10 min irradiation of 1.47 W NIR,the antibacterial rates of E.coil and S.aureus can reach 99.5％and 99.2％,respectively.In summary,through a simple,green,and efficient composite blending strategy,abundant solar energy resources can be utilized effectively through the synergistic photothermal effect of LSS and Au NPs.Considering the satisfactory effective antibacterial activity of the LSS50/PVA50@Aul composite,this work may provide perspectives on the design of green photothermal antibacterial materials via pulp and paper industry waste lignin sulfonate as well as contributes to the enrichment of linin structure and chemistry.

Sodium lignin sulfonateGold nanoparticlesPhotothermal effectPhotothermal-antibacterial

郭元龙、徐同辉、李合邦、龙晓琴、谢海波

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贵州大学材料与冶金学院高分子材料与工程系 贵阳 550025

木质素磺酸钠 纳米金粒子 光热效应 光热抗菌

国家自然科学基金贵州省科技计划贵州大学引进人才科研(自然科学)贵州大学基础研究项目贵州省双碳与新能源技术创新发展研究院开放课题

22275041黔科合基础-ZK[2021]重点023贵大人基合字202216号贵大基础[2023]01号DCRE-2023-15

2024

10.11777/j.issn1000-3304.2023.23286

高分子学报
中国科学院化学研究所 中国化学会

高分子学报

CSTPCD北大核心
影响因子：0.844
ISSN：1000-3304
年,卷(期)：2024.55(8)