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| Content Provider | Springer Nature Link |
|---|---|
| Author | Xing, Zhimin Wang, Congling Yan, Jie Zhang, Li Li, Lan Zha, Liusheng |
| Copyright Year | 2010 |
| Abstract | The microcapsules with interpenetrating polymer network (IPN) structure based on crosslinked poly (N-isopropylacrylamide) (PNIPAM) and crosslinked poly (acrylic acid) (PAA) were fabricated in a three-step process. Firstly, silica/PNIPAM core/shell composite particles were synthesized by thermo-initiated seed precipitation polymerization using 3-(trimethoxysilyl)propyl methacrylate modified silica colloidal particles as seeds and N-isopropylacrylamide and N,N′-methylenebisacrylamide (MBA) as monomer and crosslinker, respectively. Secondly, PAA network was incorporated into the shell of the composite particles by redox-initiated polymerization of acrylic acid and MBA entrapped in the PNIPAM network. Finally, the silica core of the composite particles was removed using hydrofluoric acid under certain condition to produce the microcapsules. The chemical compositions, their mass ratio, and particle sizes of the particles formed in each step were determined by Fourier transformation infrared spectroscopy, thermogravimetry, and dynamic laser light scattering (DLLS), respectively. The IPN structure of the microcapsules was identified by transmission electron microscopy (TEM) using uranyl acetate staining method, and their hollow structure was evidenced by TEM and scanning electron microscopy. Their temperature- or pH-dependent hydrodynamic diameters were measured by DLLS, and the results showed that the microcapules had both pH- and temperature-responsive properties, and the temperature-responsive component and the pH-responsive component inside the microcapsule shell had little interference with each other. |
| Starting Page | 1723 |
| Ending Page | 1729 |
| Page Count | 7 |
| File Format | |
| ISSN | 0303402X |
| Journal | Colloid and Polymer Science |
| Volume Number | 288 |
| Issue Number | 18 |
| e-ISSN | 14351536 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2010-10-27 |
| Publisher Place | Berlin/Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Microcapsules Interpenetrating polymer networks (IPN) pH responsiveness Temperature responsiveness Poly (acrylic acid) Poly (N-isopropylacrylamide) Food Science Physical Chemistry Characterization and Evaluation of Materials Soft and Granular Matter, Complex Fluids and Microfluidics Polymer Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics |
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