Next Article in Journal
Aggregate Effect on the Concrete Cone Capacity of an Undercut Anchor under Quasi-Static Tensile Load
Previous Article in Journal
Structure and Electromagnetic Properties of Cellular Glassy Carbon Monoliths with Controlled Cell Size
Open AccessArticle

Preparation of Tea Tree Oil/Poly(styrene-butyl methacrylate) Microspheres with Sustained Release and Anti-Bacterial Properties

by Guanquan Lin 1,2, Huayao Chen 1,2, Hongjun Zhou 1,2,*, Xinhua Zhou 1,2,* and Hua Xu 1,2
1
School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
2
Guangzhou Key Lab for Efficient Use of Agricultural Chemicals, Guangzhou 510225, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(5), 710; https://doi.org/10.3390/ma11050710
Received: 26 March 2018 / Revised: 21 April 2018 / Accepted: 27 April 2018 / Published: 1 May 2018
(This article belongs to the Section Structure Analysis and Characterization)
Using butyl methacrylate (BMA) and styrene (St) as monomers and divinylbenzene (DVB) as a crosslinking agent, P(St-BMA) microspheres were prepared by suspension polymerization. Tea tree oil (TTO) microspheres were prepared by adsorbing TTO on P(St-BMA) microspheres. The structure and surface morphology of P(St-BMA) microspheres and TTO microspheres were characterized by Fourier transformed infrared spectroscopy (FTIR), optical microscopy, and Thermogravimetric analysis (TGA). In doing so, the structural effect of P(St-BMA) microspheres on oil absorption and sustained release properties could be investigated. The results show that the surface of the P(St-BMA) microspheres in the process of TTO microsphere formation changed from initially concave to convex. The TTO microspheres significantly improved the stability of TTO, which was found to completely decompose as the temperature of the TTO increased from about 110 °C to 150 °C. The oil absorption behavior, which was up to 3.85 g/g, could be controlled by adjusting the monomer ratio and the amount of crosslinking agent. Based on Fickian diffusion, the sustained release behavior of TTO microspheres was consistent with the Korsmeyer-Pappas kinetic model. After 13 h of natural release, the anti-bacterial effect of the TTO microspheres was found to be significantly improved compared to TTO. View Full-Text
Keywords: tea tree oil; microspheres; sustained release; anti-bacterial effect tea tree oil; microspheres; sustained release; anti-bacterial effect
Show Figures

Graphical abstract

MDPI and ACS Style

Lin, G.; Chen, H.; Zhou, H.; Zhou, X.; Xu, H. Preparation of Tea Tree Oil/Poly(styrene-butyl methacrylate) Microspheres with Sustained Release and Anti-Bacterial Properties. Materials 2018, 11, 710.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop