Colloidal Probes of PNIPAM-Grafted SiO2 in Studying the Microrheology of Thermally Sensitive Microgel Suspensions
The complex rheology and the phase behavior of thermally sensitive poly(N-isopropylacrylamide) (PNIPAM) microgels have been investigated in both the swollen and collapsed states by using microrheology. To avoid the interactions between the tracer probes and the PNIPAM microgels, such as the adsorpti...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Polymer Technology |
| Online Access: | http://dx.doi.org/10.1155/2020/3971953 |
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| author | Jing Shang Ruonan Gao Fu Su Huaguang Wang Dan Zhu |
| author_facet | Jing Shang Ruonan Gao Fu Su Huaguang Wang Dan Zhu |
| author_sort | Jing Shang |
| collection | DOAJ |
| description | The complex rheology and the phase behavior of thermally sensitive poly(N-isopropylacrylamide) (PNIPAM) microgels have been investigated in both the swollen and collapsed states by using microrheology. To avoid the interactions between the tracer probes and the PNIPAM microgels, such as the adsorption or the depletion effect, the probes of silica (SiO2) particles have been grafted with PNIPAM chains (SiO2-PNIPAM) and characterized with Fourier transform infrared spectroscopy (FTIR). The successful preparation of SiO2-PNIPAM has also been proved by the investigation of the particle size and morphology with dynamic light scattering (DLS) and transmission electron microscope (TEM) below and beyond the phase transition temperature of PNIPAM. The microrheology of the PNIPAM microgel suspension has been investigated by using the prepared SiO2-PNIPAM particles as microrheological probes, and the results show that the diffusive coefficient of the probes in the swollen state is one-fifth of that in the collapsed state, and the viscosity of the PNIPAM microgel suspension in the swollen state is four times higher than that in the collapsed state, indicating SiO2-PNIPAM is a good probe in the microrheological study of PNIPAM microgel suspensions. |
| format | Article |
| id | doaj-art-6a5bbdce97f149cfb10d3f1c61152117 |
| institution | Kabale University |
| issn | 0730-6679 1098-2329 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Polymer Technology |
| spelling | doaj-art-6a5bbdce97f149cfb10d3f1c611521172025-08-20T03:33:39ZengWileyAdvances in Polymer Technology0730-66791098-23292020-01-01202010.1155/2020/39719533971953Colloidal Probes of PNIPAM-Grafted SiO2 in Studying the Microrheology of Thermally Sensitive Microgel SuspensionsJing Shang0Ruonan Gao1Fu Su2Huaguang Wang3Dan Zhu4Jiangsu Key Laboratory of Bio-functional Materials, College of Chemistry and Material Science, Nanjing Normal University, Nanjing 210023, ChinaJiangsu Key Laboratory of Bio-functional Materials, College of Chemistry and Material Science, Nanjing Normal University, Nanjing 210023, ChinaJiangsu Key Laboratory of Bio-functional Materials, College of Chemistry and Material Science, Nanjing Normal University, Nanjing 210023, ChinaCenter for Soft Condensed Matter & Interdisciplinary Research, College of Chemistry, Chemical Engineering and Materials Science, Suchow University, Suzhou 215006, ChinaJiangsu Key Laboratory of Bio-functional Materials, College of Chemistry and Material Science, Nanjing Normal University, Nanjing 210023, ChinaThe complex rheology and the phase behavior of thermally sensitive poly(N-isopropylacrylamide) (PNIPAM) microgels have been investigated in both the swollen and collapsed states by using microrheology. To avoid the interactions between the tracer probes and the PNIPAM microgels, such as the adsorption or the depletion effect, the probes of silica (SiO2) particles have been grafted with PNIPAM chains (SiO2-PNIPAM) and characterized with Fourier transform infrared spectroscopy (FTIR). The successful preparation of SiO2-PNIPAM has also been proved by the investigation of the particle size and morphology with dynamic light scattering (DLS) and transmission electron microscope (TEM) below and beyond the phase transition temperature of PNIPAM. The microrheology of the PNIPAM microgel suspension has been investigated by using the prepared SiO2-PNIPAM particles as microrheological probes, and the results show that the diffusive coefficient of the probes in the swollen state is one-fifth of that in the collapsed state, and the viscosity of the PNIPAM microgel suspension in the swollen state is four times higher than that in the collapsed state, indicating SiO2-PNIPAM is a good probe in the microrheological study of PNIPAM microgel suspensions.http://dx.doi.org/10.1155/2020/3971953 |
| spellingShingle | Jing Shang Ruonan Gao Fu Su Huaguang Wang Dan Zhu Colloidal Probes of PNIPAM-Grafted SiO2 in Studying the Microrheology of Thermally Sensitive Microgel Suspensions Advances in Polymer Technology |
| title | Colloidal Probes of PNIPAM-Grafted SiO2 in Studying the Microrheology of Thermally Sensitive Microgel Suspensions |
| title_full | Colloidal Probes of PNIPAM-Grafted SiO2 in Studying the Microrheology of Thermally Sensitive Microgel Suspensions |
| title_fullStr | Colloidal Probes of PNIPAM-Grafted SiO2 in Studying the Microrheology of Thermally Sensitive Microgel Suspensions |
| title_full_unstemmed | Colloidal Probes of PNIPAM-Grafted SiO2 in Studying the Microrheology of Thermally Sensitive Microgel Suspensions |
| title_short | Colloidal Probes of PNIPAM-Grafted SiO2 in Studying the Microrheology of Thermally Sensitive Microgel Suspensions |
| title_sort | colloidal probes of pnipam grafted sio2 in studying the microrheology of thermally sensitive microgel suspensions |
| url | http://dx.doi.org/10.1155/2020/3971953 |
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