期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 36, 期 18, 页码 1640-1645出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201500239
关键词
avermectin; hollow spheres; photopolymerization; polydopamine; thermally responsive systems
资金
- National Natural Science Foundation of China [21264013, 21364010]
- Technology Foundation for Selected Overseas Chinese Scholar
- Ministry of Human Resources and Social Security of the People's Republic of China
- Scientific Research Foundation for High Level Talents of Shihezi University [RCZX 201206]
A thermo-controlled pesticide release system composed of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) thin film grafted polydopamine (PDA) (PDMAEMA-g-PDA) microcapsules is reported. SiO2 microparticles are used as a template to prepare PDA-coated SiO2 microparticles. The thermally-responsive PDMAEMA thin films are grafted on PDA surfaces using a metal-free surface-initiated photopolymerization approach without adding any photo initiator or photosensitizer under UV light irradiation. The subsequent acid etching yields PDMAEMA-g-PDA hollow microcapsules. PDMAEMA-g-PDA microcapsules exhibit well-controlled release of avermectin (Av). The results show that the loading ability of PDMAEMA-g-PDA microcapsules of Av is up to 52.7% (w/w). The release kinetics of Av demonstrate that Av@PDMAEMA-g-PDA microcapsules exhibit temperature-controlled release performance. This work is significant for controlled release systems. This simple design is expected to be used in various applications, such as in controlled drug release and agriculture-related fields.
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