Multi-Responsive Behaviors of Copolymers Bearing N-Isopropylacrylamide with or without Phenylboronic Acid in Aqueous Solution
Continuing efforts to develop novel smart materials are anticipated to upgrade the quality of life of humans. Thermo-responsive poly(N-isopropylacrylamide) and glucose-responsive phenylboronic acid—typical representatives—are often integrated as multi-stimuli-sensitive materials, but few are availab...
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doaj-c9829c54f217434abb925ebd5e037d0a2020-11-24T21:01:33ZengMDPI AGPolymers2073-43602018-03-0110329310.3390/polym10030293polym10030293Multi-Responsive Behaviors of Copolymers Bearing N-Isopropylacrylamide with or without Phenylboronic Acid in Aqueous SolutionJiaxing Li0Lei Yang1Xiaoguang Fan2Fei Wang3Jing Zhang4Zhanyong Wang5School of Environmental and Biological Engineering, Liaoning Shihua University, Fushun 113001, ChinaSchool of Environmental and Biological Engineering, Liaoning Shihua University, Fushun 113001, ChinaCollege of Engineering, Shenyang Agricultural University, Shenyang 110866, ChinaSchool of Environmental and Biological Engineering, Liaoning Shihua University, Fushun 113001, ChinaSchool of Environmental and Biological Engineering, Liaoning Shihua University, Fushun 113001, ChinaSchool of Environmental and Biological Engineering, Liaoning Shihua University, Fushun 113001, ChinaContinuing efforts to develop novel smart materials are anticipated to upgrade the quality of life of humans. Thermo-responsive poly(N-isopropylacrylamide) and glucose-responsive phenylboronic acid—typical representatives—are often integrated as multi-stimuli-sensitive materials, but few are available for side-by-side comparisons with their properties. In this study, both copolymers bearing N-isopropylacrylamide (NIPAAm), with or without 3-acrylamidophenylboronic acid (AAPBA), were synthesized by free radical polymerization, and characterized by Fourier transform infrared spectrometry, nuclear magnetic resonance hydrogen spectroscopy and gel permeation chromatography. Dynamic light scattering was used to analyze and compare the responsive behaviors of the copolymers in different aqueous solutions. Atomic force microscopy was also employed to investigate the apparent morphology changes with particle sizes. The results demonstrated that the introduction of NIPAAm endowed the composite materials with thermosensitivity, whereas the addition of AAPBA lowered the molecular weight of the copolymers, intensified the intermolecular aggregation of the nanoparticles, reduced the lower critical solution temperature (LCST) of the composites, and accordingly allowed the copolymers to respond to glucose. It was also concluded that the responding of smart copolymers to operating parameters can be activated only under special conditions, and copolymer dimension and conformation were affected by inter/intramolecular interactions.http://www.mdpi.com/2073-4360/10/3/293poly(N-isopropylacrylamide)phenylboronic acidsmart responsive behaviorhydrodynamic diameterdynamic light scattering |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jiaxing Li Lei Yang Xiaoguang Fan Fei Wang Jing Zhang Zhanyong Wang |
spellingShingle |
Jiaxing Li Lei Yang Xiaoguang Fan Fei Wang Jing Zhang Zhanyong Wang Multi-Responsive Behaviors of Copolymers Bearing N-Isopropylacrylamide with or without Phenylboronic Acid in Aqueous Solution Polymers poly(N-isopropylacrylamide) phenylboronic acid smart responsive behavior hydrodynamic diameter dynamic light scattering |
author_facet |
Jiaxing Li Lei Yang Xiaoguang Fan Fei Wang Jing Zhang Zhanyong Wang |
author_sort |
Jiaxing Li |
title |
Multi-Responsive Behaviors of Copolymers Bearing N-Isopropylacrylamide with or without Phenylboronic Acid in Aqueous Solution |
title_short |
Multi-Responsive Behaviors of Copolymers Bearing N-Isopropylacrylamide with or without Phenylboronic Acid in Aqueous Solution |
title_full |
Multi-Responsive Behaviors of Copolymers Bearing N-Isopropylacrylamide with or without Phenylboronic Acid in Aqueous Solution |
title_fullStr |
Multi-Responsive Behaviors of Copolymers Bearing N-Isopropylacrylamide with or without Phenylboronic Acid in Aqueous Solution |
title_full_unstemmed |
Multi-Responsive Behaviors of Copolymers Bearing N-Isopropylacrylamide with or without Phenylboronic Acid in Aqueous Solution |
title_sort |
multi-responsive behaviors of copolymers bearing n-isopropylacrylamide with or without phenylboronic acid in aqueous solution |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2018-03-01 |
description |
Continuing efforts to develop novel smart materials are anticipated to upgrade the quality of life of humans. Thermo-responsive poly(N-isopropylacrylamide) and glucose-responsive phenylboronic acid—typical representatives—are often integrated as multi-stimuli-sensitive materials, but few are available for side-by-side comparisons with their properties. In this study, both copolymers bearing N-isopropylacrylamide (NIPAAm), with or without 3-acrylamidophenylboronic acid (AAPBA), were synthesized by free radical polymerization, and characterized by Fourier transform infrared spectrometry, nuclear magnetic resonance hydrogen spectroscopy and gel permeation chromatography. Dynamic light scattering was used to analyze and compare the responsive behaviors of the copolymers in different aqueous solutions. Atomic force microscopy was also employed to investigate the apparent morphology changes with particle sizes. The results demonstrated that the introduction of NIPAAm endowed the composite materials with thermosensitivity, whereas the addition of AAPBA lowered the molecular weight of the copolymers, intensified the intermolecular aggregation of the nanoparticles, reduced the lower critical solution temperature (LCST) of the composites, and accordingly allowed the copolymers to respond to glucose. It was also concluded that the responding of smart copolymers to operating parameters can be activated only under special conditions, and copolymer dimension and conformation were affected by inter/intramolecular interactions. |
topic |
poly(N-isopropylacrylamide) phenylboronic acid smart responsive behavior hydrodynamic diameter dynamic light scattering |
url |
http://www.mdpi.com/2073-4360/10/3/293 |
work_keys_str_mv |
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1716777641793552384 |