水溶性聚合物对液晶乳液性能的影响

doi:10.3969/j.issn.2097-2806.2023.10.001

摘要/Abstract

摘要：

探究了海藻酸钠、黄原胶、卡波姆940、聚丙烯酸钠等四种水溶性聚合物对液晶乳液性能的影响，通过稳定性、热失重、流变学等实验进行考察。结果表明：添加卡波姆940对液晶结构与粒径无明显影响，离心稳定性表现较佳；黄原胶和卡波姆940对液晶乳液的室温储存有一定帮助且结合水含量占比最大，液晶含量多；流变学结果表明，添加卡波姆940会增加乳液的表观黏度、触变环面积与黏弹性，使液晶胶网抵抗外力应变的能力变强且不易发生形变。

关键词: 水溶性聚合物, 液晶乳液, 液晶结构, 乳液性能

Abstract:

The effect of four water-soluble polymers including sodium alginate, xanthan gum, carbopol 940, and sodium polyacrylate in the liquid crystal emulsions have been described in this work, through the experiments including stability tests, thermal gravimetric analysis, and rheology. The results show that the addition of carbopol 940 has no effect on the liquid crystal structure and particle size, but performs the best in centrifugation stability. In addition, xanthan gum helps the emulsion to preserve at room temperature, with the largest proportion of bound water and liquid crystal content. The rheological tests show that the four liquid crystal emulsions are non-Newtonian liquids. Incorporation of carbopol 940 increases the viscosity, thixotropy loop area and viscoelasticity of the emulsion, as well as increases the ability of the liquid crystal structure to withstand external forces and not easy to deformate. In conclusion, this paper provides experimental basis for the application of water-soluble polymers in the formulation of liquid crystal emulsions.

Key words: water-soluble polymer, liquid crystal emulsion, liquid crystal structure, emulsion property

中图分类号:

O648.23

孔祥灵, 蓝云萍, 刘晓纯, 王诗琼, 郑益锋, 陈来成, 何秋星. 水溶性聚合物对液晶乳液性能的影响[J]. 日用化学工业（中英文）, 2023, 53(10): 1115-1124.

Kong Xiangling, Lan Yunping, Liu Xiaochun, Wang Shiqiong, Zheng Yifeng, Chen Laicheng, He Qiuxing. Effect of water-soluble polymer on the properties of liquid crystal emulsions[J]. China Surfactant Detergent & Cosmetics, 2023, 53(10): 1115-1124.

图/表 16

参考文献 21

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Phase	Component	w/%
A	Atolein	5
	Olive oil	5
	Alkyl glycoside emulsifier	3
	Cetanol	1.5
B	Water	To 100
	Glycerol	5
	Water-soluble polymer	0.15
C	A91	0.1

Types	Storage conditions		Stability		Types	Storage conditions		Stability
Types	Storage conditions		0%	0.15%	Types	Storage conditions		0%	0.15%
Sodium alginate	Room temperature	24 h	++++	++++	Carbopol 940	Room temperature	24 h	++++	+++
	Low temperature	24 h	++++	++++		Low temperature	24 h	++++	+++
	Low temperature	3 cycles	+++	+++		Low temperature	3 cycles	+++	++
	High temperature	24 h	++++	++		High temperature	24 h	++++	+++
	High temperature	7 d	+++	+		High temperature	7 d	+++	++
Xanthan gum	Room temperature	24 h	++++	++++	Sodium polyacrylate	Room temperature	24 h	++++	+++
	Low temperature	24 h	++++	+++++		Low temperature	24 h	++++	++
	Low temperature	3 cycles	+++	++++		Low temperature	3 cycles	+++	+
	High temperature	24 h	++++	++++		High temperature	24 h	++++	++
	High temperature	7 d	+++	++++		High temperature	7 d	+++	+

Sample	Free water/%	Bound water/%	Total water/%
A	45.860	32.370	78.224
B	57.359	21.740	79.099
C	36.524	42.955	79.477
D	43.552	32.156	75.708
E	59.572	21.756	81.328

	Blank control	Sodium alginate	Xanthan gum	Carbopol 940	Sodium polyacrylate
G'	614.7	27.214	91.446	1 408.8	91.695
G"	171.28	21.121	61.643	392.13	47.019
D-value	443.42	6.09	29.80	1 016.670	44.676