采用熔融插层法制备了膨润土基复合相变材料,得到十四酸(MA)和十六醇(HD)二元低共熔混合相变材料(PCM)与改性膨润土最佳的质量复合比。在60℃高温下,利用扩散-渗出圈法检测,未发现PCM渗漏现象。利用X射线衍射、扫描电镜和红外光谱表征了膨润土、有机改性膨润土和膨润土基复合相变材料。结果表明:经过十六烷基三甲基溴化铵(CTAB)改性,膨润土层间距由1.511nm扩大到1.680nm;PCM进入有机改性膨土层间,复合效果良好,未发生化学反应;经200次热循环实验,热稳定性能良好。
Bentonite based composite phase change materials were prepared by melting intercalation method.The best quality ratio of myristic acid (MA) and hexadecanol (HD) binary eutectic mixture phase change material (PCM) and modified bentonite was achieved.Under the temperature of 60℃,PCM leakage was not found using diffusion-seeping circle test.Bentonite,organic modified bentonite and bentonite based composite phase change materials were characterized using XRD,SEM and FT-IR.The results showed that the layer spacing of bentonite was expanded from 1.511nm to 1.680nm after hexadecyl trimethyl ammonium bromide (CTAB) modification.PCM was adsorbed effectively into organic modified bentonite layers.No chemical reaction happened between bentonite and PCM.After 200 times thermal cycling test,the thermal stability of PCM was good.
[1] 侯利恩.中国建筑能源消费情况研究[J].华中建筑,2015,33(12):94-100.
[2] 江亿,彭琛,燕达.中国建筑节能的技术路线图[J].建设科技,2012(17):12-19.
[3] Alawadhi E M.Using phase change materials in window shutter to reduce the solar heat gain[J].Energy and Buildings,2012,47(4):421-429.
[4] Jegadheeswaran S,Pohekar S D.Performance enhancement in latent heat thermal storage system:a review[J].Renewable & Sustainable Energy Reviews,2009,13(9):2225-2244.
[5] Wang C.Study on acidation modification of calci-bentonite[J].Progress in Organic Coatings,2015,81:58-65.
[6] 管学茂,宋纤纤,张建武,等.膨润土相变储能材料的制备与性能研究[J].太阳能学报,2015,36(4):950-954.
[7] Wang X P,Yi Z,Shen Z Q,et al.Melting intercalation method to prepare montmorillonite based paraffin composite phase change energy storage material[J].Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society,2011,39(4):624-629(6).
[8] 王小鹏,张毅,沈振球,等.熔融插层法制备蒙脱石基石蜡复合相变储能材料[J].硅酸盐学报,2011,39(4):624-629.
[9] Chen M Z,Zheng S P,Wu S P,et al.Experimental research on lauric acid/organophilic montmorillonite composite phase change material[J].Journal of Wuhan University of Technology,2010,32(18):4-7.
[10] 郭艳芹,董连洋,张正国,等.不同十八烷含量膨润土基复合相变储热材料的性能研究[J].非金属矿,2010,33(3):42-44.
[11] 肖春香,陈中华,苏国徽.新型相变储能石膏板的性能研究[J].化工新型材料,2008,36(6):90-91.
[12] 薛永丽.膨润土基纳米复合PCM制备及其建筑节能应用[D].大连:大连理工大学,2011.
[13] 蔡伟,孙志高,马鸿凯,等.有机复合相变材料性能研究[J].化工新型材料,2015,43(8):87-89.
[14] 方晓明,张正国,文磊,等.硬脂酸/膨润土纳米复合相变储热材料的制备、结构与性能[J].化工学报,2004,55(4):678-681.
基金资助
江苏省自然科学基金(BK2012602);江苏省住建厅科技项目(2016ZD134);江苏省智慧节能重点实验室(2015-06);苏州科技大学研究生创新项目(SKCX15-029);江苏省研究生科研创新计划项目(KYLX15-1309)
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