Preparation and Properties of Sulfonic Waterborne Polyurethane Hydrogels with Sodium N,N-Bis (2-hydroxyethyl)-2-aminoethane Sulfonate as Chain Extender

doi:10.11944/j.issn.1000-0518.2019.06.180263

Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (6): 631-640.DOI: 10.11944/j.issn.1000-0518.2019.06.180263

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Preparation and Properties of Sulfonic Waterborne Polyurethane Hydrogels with Sodium N,N-Bis (2-hydroxyethyl)-2-aminoethane Sulfonate as Chain Extender

GUO Xiaoyan,CHENG Xiaoqi,ZHANG Liangliang,HUANG Yiping(),XU Gewen,BAO Junjie

Key Laboratory of Green Polymer Materials of Anhui Province,College of Chemistry and Chemical Engineering,Anhui University,Hefei 230601,China

Received:2018-08-10 Accepted:2018-12-22 Published:2019-06-01 Online:2019-06-03
Contact: HUANG Yiping
Supported by:
Supported by the Natural Science Foundation of Anhui Province(No.1808085QE173), the Science Research Project of the Anhui Province Universities(No.KJ2017A031)

Abstract

Abstract:

A series of sulfonic waterborne polyurethane hydrogels(WPUHs) was prepared by in-situ polymerization using 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate(IPDI), polyethylene glycol(PEG) and diethylene glycol(DEG) as raw materials, and 2,2-dimethylol propionic acid(DMPA) and N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid sodium salt(BES-Na) as hydrophilic chain extenders. The structure and properties of the gels are characterized by X-ray diffractometer, thermogravimetric analyzer and electro-mechanical universal testing machine. The results show that the thermal stability of the hydrogels increases gradually with the increase of BES-Na mass fraction, and the compressive strength and compressive modulus of WPUH7 hydrogel containing 3.46% mass fraction BES-Na are 2.9 times and 3.6 times higher than those of the WPUH1 hydrogel containing 0% mass fraction BES-Na, respectively. The swelling ratio increases from 20.55 to 29.25, and the increase of BES-Na mass fraction has a significant influence on the initial process of hydrogel swelling. At the same time, the swelling ratio of WPUH7 hydrogel increases from 17.64 to 33.80 in the range of 10~45 ℃ and from 20.74 to 70.69 in the range of pH 2~10, indicating that hydrogels have good sensitivity to temperature and pH.

Key words: polyurethane hydrogel, sulfonic group, swelling kinetics, temperature and pH sensibility

GUO Xiaoyan, CHENG Xiaoqi, ZHANG Liangliang, HUANG Yiping, XU Gewen, BAO Junjie. Preparation and Properties of Sulfonic Waterborne Polyurethane Hydrogels with Sodium N,N-Bis (2-hydroxyethyl)-2-aminoethane Sulfonate as Chain Extender[J]. Chinese Journal of Applied Chemistry, 2019, 36(6): 631-640.

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Preparation and Properties of Sulfonic Waterborne Polyurethane Hydrogels with Sodium N,N-Bis (2-hydroxyethyl)-2-aminoethane Sulfonate as Chain Extender

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