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Open AccessArticle

Synthesis and Properties of pH-Thermo Dual Responsive Semi-IPN Hydrogels Based on N,N’-Diethylacrylamide and Itaconamic Acid

Faculty of Chemical and Food Technology, HCMC University of Technology and Education, #1, Vo Van Ngan Street, Linh Chieu Ward, Thu Duc District, Ho Chi Minh City 70000, Vietnam
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Polymers 2020, 12(5), 1139; https://doi.org/10.3390/polym12051139 (registering DOI)
Received: 24 April 2020 / Revised: 12 May 2020 / Accepted: 13 May 2020 / Published: 16 May 2020
(This article belongs to the Special Issue Interpenetrating Polymer Networks)
A series of semi-interpenetrating polymer network (semi-IPN) hydrogels based on N,N’-diethylacrylamide (DEA) and itaconamic acid (IAM) were synthesized by changing the molar ratio of linear copolymer P(DEA-co-IAM) and DEA monomer. Linear copolymer P(DEA-co-IAM) was introduced into a solution of DEA monomer to prepare pH-thermo dual responsive P(DEA-co-IAM)/PDEA semi-IPN hydrogels. The thermal gravimetric analysis (TGA) revealed that the semi-IPN hydrogel has a higher thermal stability than the conventional hydrogel, while the interior morphology by scanning electron microscopy (SEM) showed a porous structure with the pore sizes could be controlled by changing the ratio of linear copolymer in the obtained hydrogels. The oscillatory parallel-plate rheological measurements and compression tests demonstrated a viscoelastic behavior and superior mechanical properties of the semi-IPN hydrogels. Besides, the lower critical solution temperature (LCST) of the linear copolymers increased with the increase of IAM content in the feed, while the semi-IPN hydrogels increased LCSTs with the increase of linear copolymer content introduced. The pH-thermo dual responsive of the hydrogels was investigated using the swelling behavior in various pH and temperature conditions. Finally, the swelling and deswelling rate of the hydrogels were also studied. The results indicated that the pH-thermo dual responsive semi-IPN hydrogels were synthesized successfully and may be a potential material for biomedical, drug delivery or absorption applications. The further applications of semi-IPN hydrogels are being conducted. View Full-Text
Keywords: N,N’-diethylacrylamide; itaconamic acid; poly(DEA-co-IAM); semi-IPN hydrogel; pH-responsive; thermo-responsive; swelling behavior N,N’-diethylacrylamide; itaconamic acid; poly(DEA-co-IAM); semi-IPN hydrogel; pH-responsive; thermo-responsive; swelling behavior
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MDPI and ACS Style

Tuan, H.N.A.; Nhu, V.T.T. Synthesis and Properties of pH-Thermo Dual Responsive Semi-IPN Hydrogels Based on N,N’-Diethylacrylamide and Itaconamic Acid. Polymers 2020, 12, 1139.

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