溶液除湿方式的空调系统已经广泛应用,为开发用于此系统的一种新型填料,采用静电纺丝技术制备出了聚丙烯腈(PAN)/氯化锂(LiCl)(PAN/LiCl)纳米纤维膜,探讨了LiCl添加量以及辊筒转速对纳米纤维带微观形貌的影响,同时研究了浸泡的除湿盐溶液种类和浓度对溶液除湿性能的影响。结果表明,PAN纺丝液用量为12%(wt,质量分数),LiCl用量为5.5%(wt,质量分数),辊筒转速为140r/min条件下,PAN/LiCl纳米纤维膜的微观形貌较好,纤维带粗细较均匀,并且其浸泡46%(wt,质量分数)的溴化锂(LiBr)溶液进行溶液除湿条件下,纤维膜有较好的溶液除湿性能,除湿效率为96%。在PAN纺丝液中加入LiCl,LiCl能够附着在PAN纳米纤维上,呈现纳米纤维带结构,可使纤维膜的亲水性提高。
Liquid desiccant air-conditioning systems have been widely used.In order to develop a new type of filler for this system,polyacrylonitrile (PAN)/lithium chloride (LiCl) (PAN/LiCl) nanofiber membrane were prepared by electrospinning.The influence of amount of LiCl added and the rotation peed of the electrospinning roller on microstructure of the nanofibers,as well as the influence of the type of salt solution soaked in and its concentration were investigated.The results shown that when the PAN/LiCl spinning solution was 12% (wt,mass fraction),the amount of LiCl added was 5.5wt% (wt,mass fraction),and the roller speed was 140r/min,the well-distributed PAN/LiCl nanofibrous band can be formed.And when soaked in 46% (wt,mass fraction) of lithium bromide (LiBr),the nanofiber membrane had a better liquid desiccant dehumidification performance,while the dehumidification efficiency was 96%.LiCl attached to the PAN nanofibers can improve the hydrophilicity of the nanofiber membrane.
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基金资助
北京市教育委员会科技计划一般项目(SQKM201710012004);国家自然科学基金项目(51503005,21274006);北京市自然科学基金资助项目(2182014);“北京服装学院高水平教师队伍建设专项资金”(BIFTQG201801);北京市科技北京百名领军人才工程(Z161100004916168);北京市百千万人才工程(110403000402);北京市优秀人才(2017000020124G089)
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