摘要
针对塑料换热器导热系数差的问题,提出基于PVDF(聚偏氟乙烯)疏水性中空纤维膜的界面聚合法制备换热管.该换热管兼具普通塑料换热管的致密层和PVDF疏水膜的大孔隙结构,亲水化后的换热管管壁上的微孔在换热过程中充分填充水,从而在两侧温差作用下形成微对流,提高换热管的导传热系数.本文选用间苯二胺和均苯三甲酰氯作为活性单体,PVDF疏水性中空纤维膜作为基体制备了PVDF换热管,考察了水油两相单体浓度及吹扫线速度对换热管基本性能的影响.
In view of the poor thermal conductivity of plastic heat exchanger, the method of using interracial polymerization to prepare heat exchanger tube based on PVDF （polyvinylidene fluoride） hydrophobic hollow fiber membrane was proposed. The heat exchanger tube is made of the dense layer of the common polymeric heat exchanger and the macropore structure of PVDF hydrophobic hollow fiber membrane, which can ensure the water in the heat transfer process is fully filled with the membrane pores, thereby increasing the heat conductivity of the heat exchanger tube. Meta-phenylenediamine（MPD） and trimesoyl chloride （TMC） were selected as the active monomers, PVDF hydrophobic hollow fiber membrane was adopted as support to prepare the poly-based heat exchanger in our study. The effects of the basic properties of aqueous solution, organic heat exchanger tubes were studied. solution concentration and sweeping gas velocity on the heat exchanger tubes were studied.
作者
张燕
陈华艳
高启君
贾悦
王暄
武春瑞
吕晓龙
ZHANG Yah CHEN Huayan GAO Qijun JIA Yue(State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental and Chemical Engineering, Tianiin Polytechnic University, Tianjin 300387, Chin)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2017年第3期14-20,共7页
Membrane Science and Technology
基金
国家自然科学基金(21306135)
天津工业大学省部共建分离膜与膜过程国家重点实验室自主课题(Z2-201504)
关键词
塑料换热管
界面聚合法
聚偏氟乙烯
plastic heat exchanger tube
interfacial polymerization
thermal conductivity
