Fabrication and Phase Behavior of Thermo- and/or pH-Responsive Polymer-Grafted SiO<sub>2</sub> Nanoparticles
Three series of thermo- and/or pH-responsive polymer-grafted SiO<sub>2</sub> nanoparticles, SiO<sub>2</sub>-<i>graft</i>-poly(oligo(ethylene glycol) methacrylate) (SiO<sub>2</sub>-<i>g</i>-POEGMA), SiO<sub>2</sub>-<i>graft...
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MDPI AG
2022-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/8/3799 |
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| author | Xiaoyan Liu Xu Wang Junhao Huang Xuan Liu Yu Zhang Junxia Peng |
| author_facet | Xiaoyan Liu Xu Wang Junhao Huang Xuan Liu Yu Zhang Junxia Peng |
| author_sort | Xiaoyan Liu |
| collection | DOAJ |
| description | Three series of thermo- and/or pH-responsive polymer-grafted SiO<sub>2</sub> nanoparticles, SiO<sub>2</sub>-<i>graft</i>-poly(oligo(ethylene glycol) methacrylate) (SiO<sub>2</sub>-<i>g</i>-POEGMA), SiO<sub>2</sub>-<i>graft</i>-poly(acrylic acid) (SiO<sub>2</sub>-<i>g</i>-PAA) and SiO<sub>2</sub>-<i>graft</i>-poly(oligo(ethylene glycol) methacrylate-<i>stat</i><i>e</i>-acrylic acid (SiO<sub>2</sub>-<i>g</i>-P(OEGMA-<i>stat</i>-AA)), were prepared by grafting POEGMA and/or PAA onto the surface of silica nanoparticles through the surface-initiated atom transfer radical polymerization (SI-ATRP). The lower critical solution temperature (LCST) of SiO<sub>2</sub>-<i>g</i>-POEGMA (M<sub>OEGMA</sub> = 300 g/mol) was found to be 64 °C. For SiO<sub>2</sub>-<i>g</i>-PAA nanoparticles, at the pH range from 8 to 12, the hydrodynamic diameter of the nanoparticles increases with increasing pH, and the zeta potential of SiO<sub>2</sub>-<i>g</i>-PAA nanoparticles is negatively charged and decreases with increasing pH. Owing to the thermo- and pH-responsive, the hydrodynamic diameters of SiO<sub>2</sub>-<i>g</i>-P(OEGMA-<i>stat</i>-AA) nanoparticles increase with the increasing pH, and the LCSTs of those nanoparticles increase with the increase of POEGMA content. |
| first_indexed | 2024-03-09T11:12:48Z |
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| id | doaj.art-4416d2c698d149dc9d7692f9e98939db |
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| language | English |
| last_indexed | 2024-03-09T11:12:48Z |
| publishDate | 2022-04-01 |
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| series | Applied Sciences |
| spelling | doaj.art-4416d2c698d149dc9d7692f9e98939db2023-12-01T00:39:00ZengMDPI AGApplied Sciences2076-34172022-04-01128379910.3390/app12083799Fabrication and Phase Behavior of Thermo- and/or pH-Responsive Polymer-Grafted SiO<sub>2</sub> NanoparticlesXiaoyan Liu0Xu Wang1Junhao Huang2Xuan Liu3Yu Zhang4Junxia Peng5School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, ChinaSchool of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, ChinaSchool of Chemical Engineering and Technology, Hainan University, Haikou 570228, ChinaShaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Gemmology, China University of Geosciences, Beijing 100083, ChinaSchool of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, ChinaThree series of thermo- and/or pH-responsive polymer-grafted SiO<sub>2</sub> nanoparticles, SiO<sub>2</sub>-<i>graft</i>-poly(oligo(ethylene glycol) methacrylate) (SiO<sub>2</sub>-<i>g</i>-POEGMA), SiO<sub>2</sub>-<i>graft</i>-poly(acrylic acid) (SiO<sub>2</sub>-<i>g</i>-PAA) and SiO<sub>2</sub>-<i>graft</i>-poly(oligo(ethylene glycol) methacrylate-<i>stat</i><i>e</i>-acrylic acid (SiO<sub>2</sub>-<i>g</i>-P(OEGMA-<i>stat</i>-AA)), were prepared by grafting POEGMA and/or PAA onto the surface of silica nanoparticles through the surface-initiated atom transfer radical polymerization (SI-ATRP). The lower critical solution temperature (LCST) of SiO<sub>2</sub>-<i>g</i>-POEGMA (M<sub>OEGMA</sub> = 300 g/mol) was found to be 64 °C. For SiO<sub>2</sub>-<i>g</i>-PAA nanoparticles, at the pH range from 8 to 12, the hydrodynamic diameter of the nanoparticles increases with increasing pH, and the zeta potential of SiO<sub>2</sub>-<i>g</i>-PAA nanoparticles is negatively charged and decreases with increasing pH. Owing to the thermo- and pH-responsive, the hydrodynamic diameters of SiO<sub>2</sub>-<i>g</i>-P(OEGMA-<i>stat</i>-AA) nanoparticles increase with the increasing pH, and the LCSTs of those nanoparticles increase with the increase of POEGMA content.https://www.mdpi.com/2076-3417/12/8/3799thermo-responsivepH-responsivepolymer-grafted nanoparticlelower critical solution temperature |
| spellingShingle | Xiaoyan Liu Xu Wang Junhao Huang Xuan Liu Yu Zhang Junxia Peng Fabrication and Phase Behavior of Thermo- and/or pH-Responsive Polymer-Grafted SiO<sub>2</sub> Nanoparticles Applied Sciences thermo-responsive pH-responsive polymer-grafted nanoparticle lower critical solution temperature |
| title | Fabrication and Phase Behavior of Thermo- and/or pH-Responsive Polymer-Grafted SiO<sub>2</sub> Nanoparticles |
| title_full | Fabrication and Phase Behavior of Thermo- and/or pH-Responsive Polymer-Grafted SiO<sub>2</sub> Nanoparticles |
| title_fullStr | Fabrication and Phase Behavior of Thermo- and/or pH-Responsive Polymer-Grafted SiO<sub>2</sub> Nanoparticles |
| title_full_unstemmed | Fabrication and Phase Behavior of Thermo- and/or pH-Responsive Polymer-Grafted SiO<sub>2</sub> Nanoparticles |
| title_short | Fabrication and Phase Behavior of Thermo- and/or pH-Responsive Polymer-Grafted SiO<sub>2</sub> Nanoparticles |
| title_sort | fabrication and phase behavior of thermo and or ph responsive polymer grafted sio sub 2 sub nanoparticles |
| topic | thermo-responsive pH-responsive polymer-grafted nanoparticle lower critical solution temperature |
| url | https://www.mdpi.com/2076-3417/12/8/3799 |
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