摘要
相变微胶囊在液体介质中的分散稳定性是潜热型功能流体服役性能的关键影响因素。通过添加分散剂可强化潜热型功能流体的稳定性,但分散剂本征特性和服役环境等因素对其稳定性的影响规律和调控机理尚不清晰。因此,构建了潜热型功能流体的粗粒化分子动力学模型,研究了非离子型、阴离子型和阳离子型分散剂的微观结构、组分及温度对潜热型功能流体稳定性的影响规律。结果表明,添加分散剂可改善功能流体中胶囊的团聚现象,但分散剂类型和温度对稳定性的影响存在显著差异;分散剂对潜热型功能流体分散稳定的促进作用由大到小依次为:非离子型聚乙烯醇(PVA)、阴离子型十二烷基硫酸钠(SDS)、阳离子型十六烷基三甲基溴化铵(CTAB)。
The dispersion stability of phase change microcapsules in liquid media is a key factor affecting the performance of latent heat functional fluids.The stability of latent heat functional fluids can be enhanced by adding dispersants,but the influence mechanisms and regulatory patterns of dispersants’intrinsic properties and service environments on this stability remain unclear.Therefore,this paper constructs a coarse-grained molecular dynamics model of latent heat functional fluids to study the effects of nonionic,anionic,and cationic dispersants’microstructure,composition,and temperature on the stability of latent heat functional fluids.The results show that adding dispersants can improve the aggregation of capsules in functional fluids,but there are significant differences in the stability effects of different types of dispersants and temperatures.The order of dispersant’s effectiveness in promoting the dispersion stability of latent heat functional fluids is as follows:nonionic polyvinyl alcohol(PVA),anionic sodium dodecyl sulfate(SDS),and cationic cetyltrimethylammonium bromide(CTAB).
作者
任珂
刘新健
饶中浩
REN Ke;LIU Xinjian;RAO Zhonghao(Hebei Engineering Research Center of Advanced Energy Storage Technology and Equipment,School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China;Hebei Key Laboratory of Thermal Science and Energy Clean Utilization,School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China)
出处
《化工学报》
北大核心
2025年第11期5584-5593,共10页
CIESC Journal
基金
天津市杰出青年科学基金项目(22JCJQJC00010)
天津市自然科学基金青年项目(23JCQNJC01160)
河北省高等学校科学技术研究项目(BJK2023114)。
关键词
相变胶囊
潜热型功能流体
分散剂
粗粒化
分子动力学模拟
phase-change capsules
latent heat functional fluids
dispersants
coarse-graining
molecular dynamics simulation
