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Friction of double‐network hydrogels against glass substrate in poly(vinyl alcohol) aqueous solution
Author(s) -
Li XueFeng,
Chen Qianwen,
Jiang Cheng
Publication year - 2014
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4696
Subject(s) - vinyl alcohol , aqueous solution , self healing hydrogels , materials science , polyacrylamide , substrate (aquarium) , sodium polyacrylate , chemical engineering , composite material , polymer chemistry , polymer , chemistry , organic chemistry , raw material , oceanography , engineering , geology
The frictional coefficient of biological joint cartilage is extremely low. For this, many researchers are looking to develop materials that are similar to those in nature. We prepared a poly(sodium 2‐acrylamido‐2‐methylpropanesulfonate)/polyacrylamide double‐network hydrogel, and tested the friction of the hydrogel in poly(vinyl alcohol) ( PVA ) aqueous solution, which imitates a biological environment, against glass substrate. Results show that there is a transition sliding velocity in the friction test, which decreases with an increase in PVA solution concentration. At low sliding velocities, the frictional stress exhibits a minimum at a PVA concentration of 2 c * , where c * is the overlap concentration. It is assumed that a separation layer of PVA has formed completely at this concentration, the thickness of which is calculated. In addition, the friction of the hydrogel is not sensitive to the normal pressure in PVA aqueous solution. © 2014 Society of Chemical Industry