Effect of Emulsification Process on the Thermal Properties of Stearic Acid Phase Change Microcapsules †

doi:10.7503/cjcu20190253

Abstract

Abstract:

Microcapsules were prepared by in situ polymerization using calcium carbonate as wall material and stearic acid as core material. And its surface morphology and thermal properties are characterized by scanning electron microscopy, Fourier transfer-infrared spectrometry, differential thermal analysis and thermogravimetry. The effect of emulsifying process on the surface morphology, transformation temperature and encapsulation rate were studied by changing the kinds and dosage of emulsifiers. The results showed that sodium dodecyl benzene sulfonate is the most suitable emulsifier compared with cetyltrimethylammonium bromide and TX-100, and the adequate mass proportion of the emulsifier vs. core material is 0.5%. The transformation temperature is 112.24 ℃, and the clad ratio is 92.1%.

Key words: Emulsification technology, Stearic acid, Microcapsule, Phase change material

CLC Number:

TrendMD:

CHEN Yuan,ZHAO Xuejing,LIANG Hongwei,WU Xiuwen,ZHANG Jinlin. Effect of Emulsification Process on the Thermal Properties of Stearic Acid Phase Change Microcapsules ^†[J]. Chem. J. Chinese Universities, 2019, 40(10): 2149.

Figures/Tables 6

References 27

[1]	Li K. N., Guo N. N., Wang H. , J. Ref., 2008,29(6), 46— 50
	( 李夔宁, 郭宁宁, 王贺 . 制冷学报, 2008,29(6), 46— 50)
[2]	Yang C. X., Xie D. L., Si T. Y., Huang H. , Chem. Ind. Eng. Prog., 2012,31(9), 1998— 2005
	( 杨春晓, 谢德龙, 司徒粤, 黄洪 . 化工进展, 2012,31(9), 1998— 2005)
[3]	Shen T. W., Lu S. F., Xin C., Li C. L. , China Text. Lead., 2017,36(1), 69— 73
	( 申天伟, 陆少锋, 辛成, 李朝龙 . 纺织导报, 2017,36(1), 69— 73)
[4]	Chen A. Y., Wang X. Y., Cao X. Z. , Mater. Rev., 2003,22(5), 42— 44,72
	( 陈爱英, 汪学英, 曹学增 . 材料导报, 2003,22(5), 42— 44,72)
[5]	Shi H., Wang Y., Feng H. X., Zheng H. , Appl. Chem. Ind., 2013,42(1), 122— 127
	( 师欢, 王毅, 冯辉霞, 郑翰 . 应用化工, 2013,42(1), 122— 127)
[6]	Li Y., Xing J. W., Lu S. F. , Adhesion, 2014,35(12), 87— 91
	( 李钰, 邢建伟, 陆少峰 . 粘接, 2014,35(12), 87— 91)
[7]	Wang J. P., Zhang X. X., ., Mater. Rev., 2007,26(4), 107— 110
	( 王建平, 张兴祥 . 材料导报, 2007,26(4), 107— 110)
[8]	Cho J. S., Kwon A., Cho C.G. , Coll. Pol. Sci., 2002,280(5), 260— 266
[9]	Zhan S. P., Zhou Z. Y., Huang X., Cui L. Y. ., Mater. Rev., 2012,12(12), 76— 78
	( 詹世平, 周智轶, 黄星, 崔丽云 . 材料导报, 2012,12(12), 76— 78)
[10]	Guo H. L., Zhao X. P. , J. Funct. Mater., 2003,34(6), 609— 611
	( 郭慧林, 赵晓鹏 . 功能材料, 2003,34(6), 609— 611)
[11]	Wang Y. , Shandong Chem. Ind., 2012,41(3), 111— 113
	( 王宇 . 山东化工, 2012,41(3), 111— 113)
[12]	Meng L. K. , Preparation and Characterization of MicroPCMs for Stearic Acids, Shanghai,Donghua University, 2016
	( 孟令阔 . 硬脂酸相变微胶囊的制备与表征. 上海: 东华大学, 2016)
[13]	Wang G., Qin L. C., Jiang Y. , Chem. Glu., 2012,19(4), 77— 79
	( 王刚, 秦立翠, 姜艳 . 化学与粘合, 2012,19(4), 77— 79)
[14]	Zhou L., Cao L. X. , J. Func. Mater., 2009,40(5), 755— 762
	( 周磊, 曹立新 . 功能材料, 2009,40(5), 755— 762)
[15]	Wu Z. M., Huang X. , Mater. Rev., 2015,29(7), 73— 76
	( 吴梓敏, 黄雪 . 材料导报, 2015,29(7), 73— 76)
[16]	Peng P., Wang X. F., Zhao T., Zheng J. F. , New Chem. Mater., 2016,44(11), 122— 127
	( 彭佩, 王先锋, 赵涛, 郑建范 . 化工新型材料, 2016,44(11), 122— 127)
[17]	Zhang X. X., Fan Y. F., Tao X. M., Yick K. L. , Mater. Chem. Phys., 2004,88(2/3), 300— 307
[18]	Yan Y., Liu J., Zhang H. P. , J. South Chin. Univ. Tech.(Nat. Sci. Ed.), 2009,37(09), 139— 143
	( 鄢瑛, 刘剑, 张会平 . 华南理工大学学报(自然科学版), 2009,37(09), 139— 143)
[19]	Yan L. J , Preparation and Application of Phase Change Material Microcapsules, Beijing Institute of Clothing Technology,Beijing, 2010
	( 闫丽佳 . 相变材料微胶囊的制备及其应用, 北京: 北京服装学院, 2010)
[20]	Chen S. F., Yu S. H., Jiang J., Li F. Q., Liu Y. K. , Chem. Mater., 2006,18(1), 115— 122
[21]	Wei H., Shen Q., Zhao Y., Zhao Y., Wang D. J., Xu D. F. , J. Cryst. Growth, 2005,279(3), 439— 446
[22]	Lee S. W., Kim Y.J., Lee Y.H., Guim H., Han S. M. , Mater. Des., 2016,112(1), 367— 373
[23]	Guo J., Xiang H. X., Xu D. Z., Wang Q. Q. , J. Dalian Polytech. Univ., 2012,31(1), 60— 63
	( 郭静, 相恒学, 徐德增, 王倩倩 . 大连工业大学学报, 2012,31(1), 60— 63)
[24]	Peng P. , Synthesis and Application of Polyurea Phase Change Microencapsulation, Donghua University, Shanghai, 2016
	( 彭佩 . 聚脲相变微胶囊的制备及其应用性能研究 , 上海: 东华大学, 2016)
[25]	Xia L ., Development of Composite Phase Change Energy Storage Materials and Thermophysical Phenomena in Latent Heat Storage, Shanghai Jiao Tong University, 2011
	( 夏莉 . 复合相变储能材料的研制与潜热储能中热物理现象的研究, 上海: 上海交通大学, 2011)
[26]	Koiwai A., Suzuki F., Matsuzaki T., Kawashima N ., Phytochemistry, 1983,22, 1409— 1412
[27]	Yu S.Y. , The Synthesis, Microstructure and Properties of Calcium Carbonate Encapsulated Senior Aliphatic Alkanes , Beijing University of Chemical Technology, Beijing, 2014
	( 于诗宇 . 碳酸钙封装高级脂肪族烷烃的合成、微观结构及性能表征, 北京: 北京化工大学, 2014)

Sample No.	Emulsifier	w_E(%)	T_m/℃	ΔH_m/(J·g^-1)	ΔH_SA/(J·g^-1)	R(%)
1	CTAB	0.5	119.13	186.8	206.8	90.3
2	CTAB	0.7	122.24	23.95	206.8	11.6
3	CTAB	1	114.71	136.3	206.8	65.9
4	CTAB	2	109.27	170.2	206.8	82.3
5	TX-100	0.5	112.36	73.65	206.8	36.1
6	TX-100	0.7	61.64	33.08	206.8	17.0
7	TX-100	1	67.71	72.38	206.8	35.0
8	TX-100	2	61.25	139.9	206.8	67.6
9	SDBS	0.5	112.24	190.5	206.8	92.1
10	SDBS	0.7	113.36	144.4	206.8	69.8
11	SDBS	1	112.17	145.0	206.8	70.1
12	SDBS	2	115.43	169.2	206.8	81.8

Sample No.	Emulsifier	w_E(%)	T_m/℃	ΔH_m/(J·g^-1)	ΔH_SA/(J·g^-1)	R(%)
1	CTAB	0.5	119.13	186.8	206.8	90.3
2	CTAB	0.7	122.24	23.95	206.8	11.6
3	CTAB	1	114.71	136.3	206.8	65.9
4	CTAB	2	109.27	170.2	206.8	82.3
5	TX-100	0.5	112.36	73.65	206.8	36.1
6	TX-100	0.7	61.64	33.08	206.8	17.0
7	TX-100	1	67.71	72.38	206.8	35.0
8	TX-100	2	61.25	139.9	206.8	67.6
9	SDBS	0.5	112.24	190.5	206.8	92.1
10	SDBS	0.7	113.36	144.4	206.8	69.8
11	SDBS	1	112.17	145.0	206.8	70.1
12	SDBS	2	115.43	169.2	206.8	81.8