界面吸附对高分子液体膜去润湿动力学的影响  

Influence of Interface Adsorption on the Dewetting Kinetics of Polymer Liquid Films

作　　者：张苡宁 卫来 石彤非 徐林 ZHANG Yining;WEI Lai;SHI Tongfei;XU Lin(Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics,College of Physical Science and Technology,Yili Normal University,Yining 835000,China;School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China;Biomaterials R&D Center,Zhuhai Institute of Advanced Technology,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Zhuhai 519000,China)

机构地区：[1]伊犁师范大学物理科学与技术学院,新疆凝聚态相变与微结构重点实验室,伊宁835000 [2]广东工业大学轻工化工学院,广州510006 [3]中国科学院深圳先进技术研究院,珠海中科先进技术研究院有限公司生物材料中心,珠海519000

出　　处：《高等学校化学学报》2024年第5期149-154,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:22073093);珠海市社会发展领域科技计划项目(批准号:2220004000049)资助.

摘　　要：以线形聚苯乙烯(LPS)薄膜三臂星形聚苯乙烯(3SPS)薄膜作为研究对象,探讨了受限体系中高分子链界面吸附对高分子溶液膜界面稳定性的影响.实验结果表明,吸附在基底上的高分子链对薄膜去润湿的驱动力形成拖拽力,增大了薄膜去润湿的阻力.随着退火时间的延长,线形链和三臂星形链在基底上的吸附量逐渐增加,LPS和3SPS薄膜在丙酮蒸汽中由发生去润湿到稳定存在,孔边在薄膜去润湿过程中由不稳定转变为稳定,去润湿速度逐渐降低,平衡接触角逐渐减小.当退火时间相同时,3SPS薄膜在丙酮蒸汽中的去润湿速度比LPS薄膜更低;去润湿后3SPS薄膜在基底上的平衡接触角比LPS薄膜更小,3SPS薄膜的毛细驱动力小于LPS薄膜.Polymer films have broad applications in coatings,optoelectronic devices and sensing devices,with their interface stability being a key factor significantly affecting these applications.During the application of these films,stability not only in air but also under various environmental conditions,including in water or organic solvents is re-quired.To date,the systematic elucidation of the influence of solvent-restricted interface adsorption of polymer films on their stability has not been fully explored.In this work,focusing on linear polystyrene(LPS)films and 3-arm star-shaped polystyrene(3SPS)films,we explored the influence of polymer chain interface adsorption in confined systems on the interfacial stability of polymer solution films.We found in our experimental results that the polymer chains adsorbed on the substrate form a drag force,which drives the dewetting of the film and increases the resistance to film dewetting.As the annealing time increases,the adsorption of linear and 3-arm star-shaped chains on the substrate gradually increases,LPS and 3SPS films transit from instability to stability in acetone vapor,with the rim becoming stable during the film dewetting process,the dewetting speed gradually decreasing,and the equilibrium contact angle progressively decreasing.At the same annealing time,3SPS films exhibit a lower dewetting speed in acetone vapor than LPS films,and after dewetting,3SPS films on the substrate have a smaller equilibrium contact angle than LPS films,indicating that the capillary driving force of 3SPS films is less than that of LPS films.

关 键 词：高分子薄膜 去润湿 界面吸附 

分 类 号：O631[理学—高分子化学]