有机硅季铵盐的合成及其在洗护领域中的应用

doi:10.3969/j.issn.2097-2806.2024.07.008

Abstract

Abstract:

Silicone quaternary ammonium salts were synthesized by the ring-opening reaction between N, N-dimethyl-dodecyl amine and epoxy polyether modified silicone oils of different molecular weights. The molecular structure of products of silicone quaternary ammonium salts were characterized by FT-IR. The bacteriostatic effects of these silicone quaternary ammonium salts with different molecular weights, as well as some commercial samples and the cotton fabrics treated by them, were investigated. The Zeta potential of fabric surface treated by the single solution and the softener containing quaternary ammonium salt was also studied. The fabric-softening effect in softener and the anti-redeposition effect in detergent were studied for silicone quaternary ammonium salt. The results showed that the synthesized silicone quaternary ammonium salt had excellent bacteriostatic effect with antibacterial rate above 99.9% at a dosage as low as 0.1% （w/%）. The Zeta potential of treated fabric was increased due to the adsorption of silicone quaternary ammonium salt. A solution of merely 1% silicone quaternary ammonium salt （M_W 5 000） was able to change the surface of cotton fabric from negatively charged to positively charged, which was much better than that of the commercial samples. Moreover, the synthesized silicone quaternary ammonium salt showed significant softening effect in softener system and good anti-redeposition effects against carbon black and yellow soil in the detergent system. The anti-redeposition effect on cellulose fabric was better than that on polyester fabric.

Key words: organosilicon quaternary ammonium salt, bacteriostasis, soften, anti-redeposition

CLC Number:

TQ649

Guoqiang Cai, Lin Wang, Yan Zhang, Meilin He, Lei Zhang, Yibo He. Study on the synthesis of silicone quaternary ammonium salt and its application in the detergent and softener[J].China Surfactant Detergent & Cosmetics, 2024, 54(7): 812-820.

Figures/Tables 14

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References 17

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序号	w/%
序号	AES	AEO-9	LAS
1	0	15	0
2	7.5	7.5	0
3	15	0	0
4	0	7.5	7.5
5	7.5	0	7.5
6	0	0	15
7	5	5	5
8	2.5	10	2.5
9	10	2.5	2.5
10	2.5	2.5	10

原料	w/%
有机硅季铵盐	1
Tween-20	1
聚丙烯酰胺共聚物	1.2
苯氧乙醇	0.1
香精	0.1
水	余量
pH	4.5左右

评测标准	柔软度评分
十分粗糙、硬挺、涩感	1
粗糙、较硬、地毯的感觉	2
偶尔感觉粗糙、稍蓬松、有滑糯感	3
柔软、较光滑、有蓬松感	4
非常柔软、光滑、有弹性	5

原料名称	测试质量分数/%	抑菌率/%
原料名称	测试质量分数/%	金黄色葡萄球菌	大肠杆菌
市场样1	0.1	12.2	16.7
市场样1	1	>99.9	15.9
市场样2	0.1	50.7	18.2
市场样2	1	>99.9	50.7
5000-1	0.1	>99.9	>99.9
5000-1	1	>99.9	>99.9

样品	织物表面Zeta电位/mV
空白	-23.13
5000-1	+5.24
9000-1	-7.05
市场样1	-5.45

Study on the synthesis of silicone quaternary ammonium salt and its application in the detergent and softener

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Figures/Tables 14

References 17

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样品	Zeta电位/mV
硬水处理	-22.15
5000-1（加有5000-1的柔顺剂）	-17.36
9000-1（加有9000-1的柔顺剂）	-18.62
市场样1（加有市场样1的柔顺剂）	-18.55
不添加有机硅季铵盐的柔顺剂	-20.84

序号	柔顺剂样品	有机硅季铵盐添加量/%	柔软度平均分	平均分排序	最柔软的投票数	投票数排序
1	5000-1+柔顺剂	1	3.7	1	8	1
2	9000-1+柔顺剂	1	3.5	2	5	2
3	市场样1+柔顺剂	1	2.5	3	0	3
4	不添加有机硅季铵盐的柔顺剂	0	1.8	4	0	4

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