An antimicrobial bio-based polymer foam from ZnO-stabilised pickering emulsion templated polymerisation
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An antimicrobial bio-based polymer foam from ZnOstabilised pickering emulsion templated polymerisation Xuwang Tian1, Xiaohui Ge1, Mengya Guo1, Jinxia Ma2, Zhiqian Meng1, and Peng Lu1,2,*
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College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, Guangxi, China Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
Received: 20 June 2020
ABSTRACT
Accepted: 18 September 2020
Pickering emulsion templating has become an effective method for preparing polymer foam with precise morphology. The present study reports an antibacterial foam prepared through the polymerisation of acrylated epoxidised soybean oil (AESO) in the external phase of a water-in-oil (w/o) Pickering emulsion. Zinc oxide (ZnO) was used to stabilise water into the AESO and endow the resulting foam with antimicrobial characteristics. The effects of the oil-to-water mass ratio (3:1–1:2) and ZnO concentration (0.1–3.0 wt%) on the stability of the emulsion were studied. The emulsions were characterised in terms of the volume fraction of the emulsion phase, the viscosity of the emulsion, and the interfacial tension. The emulsion prepared with an oil-to-water ratio of 3:2 and ZnO concentration of 1.0 wt% showed strong stability. Absorption of ZnO at the oil–water interface was observed by using graphene oxide quantum dot-doped ZnO as a fluorescent marker. Antibacterial foam was formed by heating the Pickering emulsion at 120 °C for 3 h. Scanning electron microscope images show that the foam has a closed-cell structure with an average pore diameter of approximately 200 lm. The prepared foam showed antibacterial activity with an inhibition rate against E.coli of 99%. The production of a porous polymer from sustainable materials through ZnO-stabilised Pickering emulsion templating provides a facile method for preparing innovative, functional bio-based materials.
Published online: 29 September 2020
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: Annela M. Seddon.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10853-020-05354-3
1644
J Mater Sci (2021) 56:1643–1657
GRAPHIC ABSTRACT
Introduction Foam materials have been widely used in applications such as adsorption materials [1], metal electrodes [2], structural materials [3], and energy absorption materials [4] due to their low density, high porosity, large specific surface area, heat insulation capability, and corrosion resistance [5–7]. The raw materials currently used for the preparation of foam are mainly petroleum-based polymers, but these are difficult to recycle, and most of them are hazardous to the environment. In addition, polymer foams are often prepared by employing blowing agents during the foaming process, and these foaming agents are liable to migrate and affect the performance of the final product. Based on the consideration of environmental protection and sustainable use, it is necessary to develop a gree
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