皮克林乳液
乳状液
奥斯特瓦尔德成熟
润湿
化学工程
琼脂
接触角
油滴
Zeta电位
材料科学
粒子(生态学)
流变学
色谱法
粒径
扫描电子显微镜
化学
纳米技术
复合材料
纳米颗粒
遗传学
工程类
细菌
地质学
海洋学
生物
作者
Qiong Xiao,Zizhou Chen,Xiangji Xie,Yonghui Zhang,Jun Chen,Huifen Weng,Fuquan Chen,Anfeng Xiao
标识
DOI:10.1016/j.carbpol.2022.120035
摘要
A novel agar-based Pickering emulsion stabilizer was developed through the hydrophobic modification and microgelation of agar. After hexanoylation, the three-phase contact angle of hexanoylated agar (HAG) particles was adjusted from approximately 60° to 96° closing to neutral wettability. After microgelation, the particle size of the modified agar microgel was approximately 2 μm and Zeta potential reached -23.63 mV. Confocal laser microscopy and cryogenic scanning electron microscopy showed that HAG microgels formed a gel network or embedded on the surface of oil droplets, thus providing a dense barrier for oil droplets to coalesce and Ostwald ripening. The oil volume fraction and particle concentration had a significant effect on the droplet size and rheological properties of the Pickering emulsion. Pickering emulsion gels with long-term storage stability was prepared at low particle concentrations (0.7 wt%) and lower oil fractions (φ = 0.3- 0.5), which might become a new effective delivery system for bioactive substances.
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