High performances of dual network PVA hydrogel modified by PVP using borax as the structure-forming accelerator

Designed Monomers and Polymers
Min HuangLi Zhang

Abstract

A dual network hydrogel made up of polyvinylalcohol (PVA) crosslinked by borax and polyvinylpyrrolidone (PVP) was prepared by means of freezing-thawing circles. Here PVP was incorporated by linking with PVA to form a network structure, while the introduction of borax played the role of crosslinking PVA chains to accelerate the formation of a dual network structure in PVA/PVP composite hydrogel, thus endowing the hydrogel with high mechanical properties. The effects of both PVP and borax on the hydrogels were evaluated by comparing the two systems of PVA/PVP/borax and PVA/borax hydrogels. In the former system, adding 4.0% PVP not only increased the water content and the storage modulus but also enhanced the mechanical strength of the final hydrogel. But an overdose of PVP just as more than 4.0% tended to undermine the structure of hydrogels, and thus deteriorated hydrogels' properties because of the weakened secondary interaction between PVP and PVA. Likewise, increasing borax could promote the gel crosslinking degree, thus making gels show a decrease in water content and swelling ratio, meanwhile shrinking the pores inside the hydrogels and finally enhancing the mechanical strength of hydrogels prominently. The developed hydrog...Continue Reading

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Citations

Oct 19, 2019·Drug Development and Industrial Pharmacy·Shreya ThakkarManju Misra
Nov 30, 2020·International Journal of Biological Macromolecules·Jiranun ArayaphanSirinya Chantarak
Jan 21, 2021·Materials·Carolina Oliver-UrrutiaEdgar B Montufar
Jul 25, 2021·Polymers·Rodybeth Cruz-MedinaErasto Armando Zaragoza-Contreras
Sep 7, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Veronika KozlovskayaEugenia Kharlampieva
Aug 28, 2021·Journal of Functional Biomaterials·Daniela Medrano-DavidPedronel Araque-Marín

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Methods Mentioned

BETA
scanning electron microscopy

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