化工学报2026，Vol.77Issue(4)：1823-1833,11.DOI:10.11949/0438-1157.20251059
液晶弹性体温度自适应润湿性表面沸腾特性研究
Study on boiling characteristics of liquid crystal elastomer surfaces with thermally adaptive wettability
摘要
Abstract
Boiling heat transfer is one of the most effective approaches for addressing thermal management challenges in high-power devices.However,different stages of the boiling process impose distinct requirements on surface wettability,creating an urgent need for surfaces capable of adaptively regulating their wettability in response to boiling conditions.A disulfide bond-based liquid crystal elastomer was synthesized using a two-step crosslinking method,and then integrated with a copper substrate.Microstructures were formed on the surface through hot-pressing.By leveraging the shape-memory effect of the liquid crystal elastomer material together with the influence of microstructures on surface wettability,a temperature-adaptive wettability surface was fabricated,enabling a tunable contact angle from 96° at low temperature to 74° at high temperature.The boiling characteristics of an adaptively wettable surface under different temperatures and heat fluxes were investigated experimentally,including bubble and liquid behavior and boiling curves.The results indicate that at low heat fluxes,the adaptive surface promotes bubble nucleation and reduces superheat,while at high heat fluxes,it enhances liquid supply and delays dryout,thereby increasing the critical heat flux.Compared with the smooth liquid crystal elastomer surface,the adaptive surface achieved up to a 6.5％enhancement in the heat transfer coefficient,the feasibility of regulating boiling heat transfer using an adaptive surface was verified.关键词
弹性/聚合物/复合材料/润湿性/气液两相流/沸腾/传热Key words
elasticity/polymers/composites/wettability/gas-liquid two-phase flow/boiling/heat transfer分类
能源科技引用本文复制引用
陈帅,胡彦伟,刘子赫,加少坤..液晶弹性体温度自适应润湿性表面沸腾特性研究[J].化工学报,2026,77(4):1823-1833,11.基金项目
国家自然科学基金青年基金项目(52006048) （52006048）
