Preparation of Pickering emulsion based on alumina hydroxide nanoparticles

Nan WU  Jie WU  Chunyu MIAO  Guanghui MA  Wenqi AN

doi:10.12034/j.issn.1009-606X.219138

The Chinese Journal of Process Engineering >

2019 , Vol. 19 >Issue 6: 1220 - 1227

DOI: https://doi.org/10.12034/j.issn.1009-606X.219138

Materials Engineering

Preparation of Pickering emulsion based on alumina hydroxide nanoparticles

Nan WU Jie WU Chunyu MIAO Guanghui MA Wenqi AN

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1. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China 2. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 3. Hualan Biological Engineering Co., Ltd., Xinxiang, Henan 453003, China

Received date: 2019-02-28

Revised date: 2019-03-26

Online published: 2019-12-22

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Abstract

Pickering emulsion is a new type of emulsion stabilized by solid particles instead of traditional organic surfactants. Compared to the traditional surfactant-stabilized emulsion, Pickering emulsion has the advantages of strong interfacial stability, regeneration, low toxicity and low cost, and has broad application value in the fields of food, medicine and cosmetics. The size of solid particle for stabilizing Pickering emulsion is in the nanometer range. The particles used to prepare Pickering emulsion are generally inorganic particles and polymer particles, most of which are not biocompatible or easily degradable. It is important to choose materials that have both good biocompatibility and stability. In this work, the boehmite-type aluminium hydroxide nanoparticles were prepared from aluminum isopropoxide by hydrolysis?hydrothermal method. Pickering emulsion was prepared by using boehmite-type aluminium hydroxide nanoparticles as stabilizer and squalene as oil phase. The effects of preparation conditions on size distribution and stability of Pickering emulsion were examined, including the concentration of nanoparticles, aqueous phase and dispersion condition. The results showed that two main factors affected the formation of nanoparticles were hydrothermal temperature and time. When the hydrothermal temperature was set to 200℃ for 2 h, the boehmite-type aluminium hydroxide nanoparticles were spherical with good dispersibility, uniform size distribution and high crystallinity. The average size of boehmite-type aluminium hydroxide nanoparticles was 55.70?9.20 nm and the polydispersity index was 0.187?0.011. The average size of Pickering emulsion was 1870?55 nm and the polydispersity index was 0.120?0.010. The Pickering emulsion could be stored stably at room temperature for more than 120 d. Based on this study, Pickering emulsion with uniform size distribution and good dispersibility was prepared, which provided a new material for biomedical area.

Key words： aluminium hydroxide nanoparticle; hydrolysis-hydrothermal methods; boehmite; Pickering emulsion; storage stability

Cite this article

Nan WU Jie WU Chunyu MIAO Guanghui MA Wenqi AN . Preparation of Pickering emulsion based on alumina hydroxide nanoparticles[J]. The Chinese Journal of Process Engineering, 2019 , 19(6) : 1220 -1227 . DOI: 10.12034/j.issn.1009-606X.219138

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