Swelling and thermal properties of porous PNIPAM/PEG hydrogels prepared by radiation polymerization

Zhihui LI; Wentao LIU; Zhongyuan LI; Mingcheng YANG; Xujing GAO; Haitao CUI; Suqin HE; Chengshen ZHU

doi:10.13538/j.1001-8042/nst.2013.02.001

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Swelling and thermal properties of porous PNIPAM/PEG hydrogels prepared by radiation polymerization

LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS | Updated：2021-01-20

- Swelling and thermal properties of porous PNIPAM/PEG hydrogels prepared by radiation polymerization
- Nuclear Science and Techniques Vol. 24, Issue 2, Article number: 020201(2013)
- Affiliations：
  
  1.School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, China
  2.Shenzhen Academy of Metrology& Quality Inspection, Shenzhen 518131, China
  3.Isotope Institute of Henan Academy of Sciences, Zhengzhou 450015, China
- Author bio：
  
  Corresponding author. E-mail address: wtliu@zzu.edu.cn
- Funds：
- DOI：10.13538/j.1001-8042/nst.2013.02.001
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Zhihui LI, Wentao LIU, Zhongyuan LI, et al. Swelling and thermal properties of porous PNIPAM/PEG hydrogels prepared by radiation polymerization. [J]. Nuclear Science and Techniques 24(2):020201(2013)
DOI：

Zhihui LI, Wentao LIU, Zhongyuan LI, et al. Swelling and thermal properties of porous PNIPAM/PEG hydrogels prepared by radiation polymerization. [J]. Nuclear Science and Techniques 24(2):020201(2013) DOI： 10.13538/j.1001-8042/nst.2013.02.001.

摘要

Abstract

In this study, a series of porous intelligent hydrogels were synthesized by radiation exhibiting the lower critical solution temperature (LCST) and fast response involving a combination of ,N,-isopropyl acrylamide as monomer, polyethylene glycol (PEG) as pore-forming agent and ,N,N,-methylene-bis-acrylamide as crosslinking agent. The hydrogels were analyzed by Fourier transform infrared spectroscopy, and the influence of radiation doses on their swelling and thermal behaviors were studied. Their surface morphologies were examined by scanning electron microscopy. The results showed that PEG molecules only acted as pore-forming agent in the cross-linked polymerization. Their swelling ratios reduced with increasing radiation doses. The LCST was around 37°C, and varied little with the radiation doses. The frozen water content of PNIPAM/PEG,6000, hydrogel reduced with increasing the radiation dose, and was greater than that of PNIPAM hydrogel at 15 kGy. Hydrogel macropores were prepared by PEG agent, and the hydrogels without PEG had a dense surface. The porous hydrogels are expected to be applied in the field of artificial intelligence material.

关键词

Keywords

PNIPAMSwelling propertiesThermal propertiesRadiation

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Shanghai Institute of Applied Physics, Chinese Academy of Sciences

Nuclear Science and Technology Research Institute (NSTRI), Reactor & Nuclear Safety School

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