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| Preparation and Properties of Functional Composite Ethyl Cellulose Microspheres |
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| DOI：10.11981/j.issn.1000-6842.2017.01.40 |
| Key Words:high-voltage electrostatic spraying; thermo-responsiveness; magnetism; fluorescence; ethyl cellulose microsphere |
| Fund Project:国家自然科学基金(No.31200453,31200454,31470599)资助项目；江苏高校优势学科建设工程资助项目。 |
| Author Name | Affiliation | | 李 建 | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏省林业资源高效加工利用协同创新中心,江苏南京,210037 | | 周冠成 | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏省林业资源高效加工利用协同创新中心,江苏南京,210037 | | 朱文远 | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏省林业资源高效加工利用协同创新中心,江苏南京,210037 | | 吴伟兵* | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏省林业资源高效加工利用协同创新中心,江苏南京,210037 | | 景 宜 | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏省林业资源高效加工利用协同创新中心,江苏南京,210037 | | 戴红旗 | 南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏省林业资源高效加工利用协同创新中心,江苏南京,210037 |
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| Abstract: |
| Poly(N-isopropyl acrylamide) (PNIPAAM), Fe3O4 nanoparticles and dye 4-(methylamino)-9-methyl-1,8-naphthalimide (MMNI) were premixed with the solution of ethyl cellulose ethanol, and high-voltage electrostatic spraying technology was applied to prepare thermo-responsive, magnetic and fluorescent microspheres by one-step method. Results showed that the average particle size of the obtained ethyl cellulose microspheres was in submicron level. The addition of Fe3O4 increased the strength of microsphere skeleton and improved the morphology of microspheres. The average particle size of microspheres decreased as temperature exceeded the lower critical solution temperature of PNIPAAM, indicating the thermo-responsiveness of composite microspheres. Microspheres showed temperature-induced enhancement of fluorescence based on their thermo-responsiveness. Vibrating sample magnetometer analysis showed that the composite microspheres possessed good superparamagnetism． |
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