月桂酰谷氨酸钠复配体系的泡沫性能研究

doi:10.3969/j.issn.2097-2806.2025.08.010

Abstract

Abstract:

The foam properties of sodium lauroyl glutamate （SLG） and its compounded systems were investigated. The foaming ability and foam stability were measured by using a dynamic foam analyzer. The results showed that potassium cocoyl glycinate （PCG） could significantly enhance the foam properties of SLG due to its synergistic effect with SLG. At the optimum PCG/SLG mass ratio of 2:8, the initial bubble count per square millimeter （BC_initial） was 56.3 mm^-2, which was approximately 1.2 times that of single SLG, and the half-life of bubble count （t_{BC 1/2}） was 434.1 s, which was approximately 3.4 times of single SLG. Furthermore, this compounded system also exhibited excellent surface activity. The critical micelle concentration （cmc） of this surfactant mixture was 0.022 7% and the maximum surface excess （Γ_max） was relatively high. This work could provide important insights into the application of SLG in detergent products.

Key words: sodium lauroyl glutamate, foam property, amino acid surfactant, maximum surface excess

CLC Number:

TQ423

Zhecheng Wang, Zhihui Zheng, Minjia Yuan. Study on the foam properties of mixed systems based on sodium lauroyl glutamate[J].China Surfactant Detergent & Cosmetics, 2025, 55(8): 1035-1041.

Figures/Tables 12

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References 16

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简称	含义	代表的意义
BC_initial/mm^-2	初始测量时每平方毫米的气泡个数	数值越大说明泡沫越细密，发泡性能越好
t_{BC 1/2}/s	气泡个数减少50%所需要的时间	数值越大说明气泡消亡的速度越慢，泡沫稳定性越好

	50 s	300 s	600 s
SLG
PCG/SLG
SCA/SLG
SMCT/SLG
SLM/SLG
LSA/SLG

	SLG	PCG/SLG	SCA/SLG	SMCT/SLG	SLM/SLG	LSA/SLG
cmc/%	0.378 3	0.035 7	0.095 1	0.091 8	0.256 4	0.280 2
γ_cmc/ （mN/m）	22.67	22.53	22.20	22.65	22.97	22.85

	P1	P2	P3	P4	P5	P6	P7
PCG含量/%	0	1.2	2.4	3.6	6	9.6	12
SLG含量/%	12	10.8	9.6	8.4	6	2.4	0
m（PCG）:m（SLG）	0:10	1:9	2:8	3:7	5:5	8:2	N/A

	m（PCG）:m（SLG）
	0:10	1:9	2:8	3:7	5:5	8:2	10:0
cmc/%	0.378 3	0.035 7	0.022 7	0.029 7	0.032 8	0.032 3	0.030 5
γ_cmc/ （mN/m）	22.67	22.53	22.45	22.3	22.55	22.25	23.42
Γ_max/ （mol/mm²） ×10^-12	1.389 5	1.617 7	1.720 3	1.565 2	1.046 5	1.295 9	1.097 3

Study on the foam properties of mixed systems based on sodium lauroyl glutamate

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