Effect of Non-freezing Water on the Mechanical Properties of Microspherical Composite Hydrogels

doi:10.11944/j.issn.1000-0518.2018.11.180013

Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (11): 1301-1308.DOI: 10.11944/j.issn.1000-0518.2018.11.180013

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Effect of Non-freezing Water on the Mechanical Properties of Microspherical Composite Hydrogels

LIANG Xuechen^a^b,DENG Yukun^a^b,PEI Xiaopeng^a^c,ZHAI Kankan^a^c,XU Kun^a^*(),TAN Ying^a^*(),WANG Pixin^a

^aKey Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
^bUniversity of Chinese Academy of Sciences,Beijing 100049,China
^cUniversity of Science and Technology of China,Hefei 230026,China

Received:2018-01-16 Accepted:2018-03-15 Published:2018-10-31 Online:2018-10-31
Contact: XU Kun,TAN Ying
Supported by:
Supported by the National Natural Science Foundation of China(No.51673191, No.21774124), the Jilin Province Science and Technology Development Project(No.20160101306JC, No.201603101YY)

Abstract

Abstract:

The aim of this paper is to study the relationship between the ability to combine water and the toughness of hydrogel by means of differential scanning calorimetry(DSC). N-butyl methacrylate(BMA) or 2,2,3,4,4,4-hexafluorobutyl methacrylate(HFBMA) and allylamine were chosen as monomers to synthesize core-shell nanospheres(named BMA nanosphere or HFBMA nanosphere). Then, the two nanospheres were used as macromolecular initiators and crosslinking agents to prepare nanospherical composite hydrogels(named BMA-H hydrogel or HFBMA-H hydrogel). DSC, Fourier transform infrared spectrometer(FTIR) and transmission electron microscopy(TEM) were used to characterize the structures and properties of hydrogels. The results of mechanical performance analysis indicate that the HFBMA-H hydrogel has better mechanical properties and its tensile strength and fracture elongation are up to 280 kPa and 3960%, respectively, which are much higher than those of BMA-H hydrogel(101 kPa, 2700%). DSC was used to investigate the state and proportion of water in composite hydrogels with different kinds of nanospheres. The results show that the non-freezing water content of HFBMA-H hydrogel is far higher than that of BMA-H hydrogel under the same water content, and the plasticizing effect of non-freezing water has an important effect on the mechanical strength of the hydrogel.

Key words: core-shell microgel, composite hydrogel, differential scanning calorimetry, non-freezing water

LIANG Xuechen,DENG Yukun,PEI Xiaopeng,ZHAI Kankan,XU Kun,TAN Ying,WANG Pixin. Effect of Non-freezing Water on the Mechanical Properties of Microspherical Composite Hydrogels[J]. Chinese Journal of Applied Chemistry, 2018, 35(11): 1301-1308.

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Effect of Non-freezing Water on the Mechanical Properties of Microspherical Composite Hydrogels

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