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China Surfactant Detergent & Cosmetics ›› 2022, Vol. 52 ›› Issue (6): 577-584.doi: 10.3969/j.issn.1001-1803.2022.06.001

• Basic research •     Next Articles

Rheological behavior and synergistic mechanism of the mixed system of hydroxyethyl cellulose and γ-polyglutamic acid

Chen Hanjun1,Zhuang Jie1,Wu Xu1,Shen Xingliang2,3,Zhang Wanping2,3,Zhang Qianjie2,3,*()   

  1. 1. Bloomage Biotechnology Corporation Limited, Shanghai 200131, China
    2. School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, China
    3. Collaborative Innovation Center of Fragrance Flavour and Cosmetics, Shanghai 201418, China
  • Received:2021-08-30 Revised:2022-05-24 Online:2022-06-22 Published:2022-06-22
  • Contact: Qianjie Zhang E-mail:zhangqj_sit@126.com.

Abstract:

The rheological properties of the mixed system of hydroxyethyl cellulose (HEC) and γ-polyglutamic acid (γ-PGA) were systematically studied by investigating the apparent viscosity, flow curves, viscoelasticity, viscosity-temperature curves and other rheological properties. The microstructure of the mixed system of HEC and γ-PGA was also characterized. The experimental results showed that HEC and γ-PGA had synergistic effect of increasing viscosity at different mass ratios when the total mass fraction of HEC and γ-PGA was 1.2%, in which the synergistic effect of increasing viscosity was most obvious when the mass ratio of HEC/γ-PGA was 2∶1. Single HEC system, single γ-PGA system and mixed HEC/γ-PGA system were all shear thinning fluids, and their flow curves could be well fitted by Cross equation, and the correlation coefficients (R) were all greater than 0.999. Compared with the single systems of HEC and γ-PGA, the range of linear viscoelastic region of the mixed HEC/γ-PGA system increased, i.e., the overall strain resistance of the mixed HEC/γ-PGA system was enhanced. In frequency scanning, the intersection of elastic modulus (G') and viscous modulus (G'') of HEC and γ-PGA mixtures moved to the low frequency direction, indicating that the mixed system was more elastic than the single system. Meanwhile, with the increase of temperature, the apparent viscosities of single HEC, single γ-PGA and mixed HEC/γ-PGA systems were decreased to varying extent. The viscosity-temperature curves of these systems could be well fitted by the Arrhenius equation, and the correlation coefficients were greater than 0.996. For the mixed HEC/γ-PGA system, the elastic feature was dominant when the temperature was lower than 45 ℃, while the viscous feature was dominant when the temperature was higher than 45 ℃. In addition, the physical entanglement and three-dimensional network structure were strengthened after mixing HEC and γ-PGA, as shown in microstructure observation.

Key words: hydroxyethyl cellulose, γ-polyglutamic acid, rheological behavior, synergistic mechanism

CLC Number: 

  • TQ658