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China Surfactant Detergent & Cosmetics ›› 2022, Vol. 52 ›› Issue (4): 370-375.doi: 10.3969/j.issn.1001-1803.2022.04.004

• Development and application • Previous Articles     Next Articles

Study on multifunctional hair care efficacy of sodium hyaluronate

Hu Chenyu1,Qu Wenjie2,Guo Xueping2,Xu Guixin2,Zou Songyan2,Wang Jing1,*()   

  1. 1. School of Chemical & Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
    2. Bloomage Biotechnology Co., Ltd., Jinan, Shandong 250101, China
  • Received:2021-07-01 Revised:2022-01-04 Online:2022-04-22 Published:2022-04-25
  • Contact: Jing Wang E-mail:jingwang@jiangnan.edu.cn.

Abstract:

Sodium hyaluronate is widely used in medicine and other fields because of its moisturizing, anti-inflammatory, antibacterial, antiallergic and repairing effects. It has also been widely used as a favorable bioactive ingredient in cosmetics. However, the research on sodium hyaluronate in cosmetics has been focused on its application in skin care, while few study has been carried out on the hair care efficacy thereof. Particularly, the hair care efficacy of sodium hyaluronate with different molecular weight has not been reported until now. Herein, the hair care efficacy of five kinds of sodium hyaluronates with different molecular weight and structure was systematically studied based on the characterization of mechanical properties, combability, friction force, moisture content and smoothness of hair. Experimentally, natural hair and highly-damaged hair were treated by leave-on products containing 0.5% (w/%) sodium hyaluronate. The results indicated that hydrolyzed sodium hyaluronate with lower molecular weight (30-50 kDa and less than 5 kDa) exhibited more significant multifunctional hair care effects. In detail, the tensile strength and elastic modulus of damaged hair can be significantly enhanced (up to 10%), and the combing work and friction force of the hair can be reduced by over 20%. Moreover, the sodium hyaluronate treatment leads to improved moisturizing and anti-frizz property of hair. The water loss curve of hair bundle treated with sodium hyaluronate at 65 ℃ was significantly lower than that of the control group. And in the high-humidity environment, the change of hair bundle projection area after sodium hyaluronate treatment was also significantly less than that of the control group. The hair care effects of sodium hyaluronate could be possibly attributed to its interaction with hair keratin, and the effectiveness of low-molecular-weight sodium hyaluronate could be related to their enhanced penetration into hair fibers. In addition, the experiment with fluorescently labeled sodium hyaluronate directly proved that low-molecular-weight sodium hyaluronate could penetrate into the hair fibers. This study provides theoretical basis and data support for the application of sodium hyaluronate in hair care products.

Key words: hair care, sodium hyaluronate, hydrolyzed sodium hyaluronate, hair repair

CLC Number: 

  • TQ658