纳米纤维素颗粒稳定的Pickering乳液的性能研究

Studies on Characterization of Pickering Emulsions Stabilized with Nanocellulose Particles

以纤维素颗粒为乳化剂制备Pickering型乳液,研究纤维素颗粒浓度、油含量、纤维素颗粒大小对乳液粒径、电位、微结构和稳定性的影响。结果表明:随着纤维素浓度的增加,油滴表面吸附的纤维素颗粒越多,乳液粒径呈线性关系降低。随着水解时间的增加,纤维素与水的接触角增加,显示出较好的亲水湿润特性。纤维素颗粒粒径与其稳定的乳液颗粒之间存在粒度效应关系。当纤维素质量分数为0.9%,油添加量1%时水解10 h的纤维素制备得到的乳液颗粒较小,放置1周后没有发生分层现象,显示出较好的稳定性,说明利用纤维素可以构建稳定的乳液体系,实现对活性成分或药物成分的输送。

The oil-in-water pickering emulsions stabilized with nanocellulose particles were prepared and the effect of cellulose concentration,oil volume,size of cellulose particles on the size,ζ-potential,microstructure and stability of emulsion were investigated.The results showed that with the increase of cellulose concentration,the more cellulose parti cles adsorbed on the surface of oil droplets and the particle size of emulsion gradually decreased linearly.The contact angle between cellulose and water increased with the increase of hydrolysis time,which showed a good hydrophilic performing wetting properties.There was a particle size effect between the particle size and its stable emulsion particles.The emulsion stabilized with cellulose particles at hydrolysis durations of 10 h had a smaller particle diameter with the cellulose concentration 0.9%,1%oil.After a week,there was no obvious stratification of the emulsion and showed good stability.The results illustrated that cellulose can be used to build a stable emulsion system and to deliver the active ingredient or pharmaceutical ingredient.