Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (2): 020201 doi: 10.13538/j.1001-8042/nst.2013.02.001

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

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

  LI Zhihui1  LIU Wentao1,*  LI Zhongyuan2  YANG Mingcheng3  GAO Xujing1#br# CUI Haitao1  HE Suqin1  ZHU Chengshen1     

  1. 1School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, China
    2Shenzhen Academy of Metrology& Quality Inspection, Shenzhen 518131, China
    3Isotope Institute of Henan Academy of Sciences, Zhengzhou 450015, China
  • Received:2012-07-20
  • Contact: LIU Wentao E-mail:wtliu@zzu.edu.cn
  • Supported by:

    Supported by the Key Science and Technology Project of Henan Province (No. 102101210100) and the Natural Science Foundation of Henan Province (No. 2011 B430023)

LI Zhihui, LIU Wentao, LI Zhongyuan, YANG Mingcheng, GAO Xujing, CUI Haitao, HE Suqin, ZHU Chengshen. Swelling and thermal properties of porous PNIPAM/PEG hydrogels prepared by radiation polymerization.Nuclear Science and Techniques, 2013, 24(2): 020201     doi: 10.13538/j.1001-8042/nst.2013.02.001
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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 acrylamideas 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/PEG6000 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.

Key words: PNIPAM, Swelling properties, Thermal properties, Radiation