Tuning the gel size and LCST of N-isopropylacrylamide nanogels by anionic fluoroprobe

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• 作者：Kenan Koc ; Esra Alveroglu
• 关键词：Nanogel ; Pyranine ; Poly(N ; isopropylacrylamide) ; LCST
• 刊名：Colloid & Polymer Science
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：294
• 期：2
• 页码：285-290
• 全文大小：1,060 KB
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• 作者单位：Kenan Koc (1)
  Esra Alveroglu (2)
  
  1. Department of Physics, Faculty of Science and Letters, Yildiz Technical University, 34210 Esenler, Istanbul, Turkey
  2. Department of Physics Engineering, Faculty of Science and Letters, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Physical Chemistry
  Soft Matter and Complex Fluids
  Characterization and Evaluation Materials
  Food Science
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1435-1536

文摘

Varying size fluorescent N-isopropylacrylamide (NIPAM) nanogels were synthesized from 140 to 550 nm by precipitation copolymerization. N,N-methylenebisacrylamide (BIS) and ammonium persulfate APS were used as cross-linker and initiator, respectively. 8-Hydroxypyrene-1,3,6-trisulfonic Acid (Pyranine, Py) molecules were used for controlling the particle size and lower critical solution temperature (LCST) of nanogels. NIPAM, BIS and APS amount were kept constant and Py amount changed to tailor the particle size. Fluorescence spectroscopy, atomic force microscopy and light scattering methods show that Py caused smaller size nanogels due to the electrically charged \( S{O}_3^{-} \)side groups. Additionally, as seen from the light scattering experiment, LCST of nanogels is getting decrease considerably with increasing Py amount. Using of Py for tuning, the gel size and LCST were found very useful, easy and effective way, and it can be used for many biomedical applications. Keywords Nanogel Pyranine Poly(N-isopropylacrylamide) LCST