FOLLOWUS
State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
zhengjing@scu.edu.cn (J.Z.)
wujinrong@scu.edu.cn (J.R.W.)
Published:1 May 2024,
Published Online:7 December 2023,
Received:12 October 2023,
Revised:7 November 2023,
Accepted:8 November 2023
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Xu, Q. J.; Yuan, Z. Y.; Wang, C. C.; Liang, H.; Shi, Y.; Wu, H. T.; Xu, H.; Zheng, J.; Wu, J. R. Tough semi-interpenetrating polyvinylpyrrolidone/polyacrylamide hydrogels enabled by bioinspired hydrogen-bonding induced phase separation. Chinese J. Polym. Sci. 2024, 42, 591–603
Qiong-Jun Xu, Zhao-Yang Yuan, Chang-Cheng Wang, et al. Tough Semi-interpenetrating Polyvinylpyrrolidone/Polyacrylamide Hydrogels Enabled by Bioinspired Hydrogen-bonding Induced Phase Separation. [J]. Chinese Journal of Polymer Science 42(5):591-603(2024)
Xu, Q. J.; Yuan, Z. Y.; Wang, C. C.; Liang, H.; Shi, Y.; Wu, H. T.; Xu, H.; Zheng, J.; Wu, J. R. Tough semi-interpenetrating polyvinylpyrrolidone/polyacrylamide hydrogels enabled by bioinspired hydrogen-bonding induced phase separation. Chinese J. Polym. Sci. 2024, 42, 591–603 DOI: 10.1007/s10118-024-3066-z.
Qiong-Jun Xu, Zhao-Yang Yuan, Chang-Cheng Wang, et al. Tough Semi-interpenetrating Polyvinylpyrrolidone/Polyacrylamide Hydrogels Enabled by Bioinspired Hydrogen-bonding Induced Phase Separation. [J]. Chinese Journal of Polymer Science 42(5):591-603(2024) DOI: 10.1007/s10118-024-3066-z.
Hydrogen bonding-induced phase separation strategy to construct poly(vinylpyrrolidone)/poly(acrylamide) semi-IPN hydrogels. SAXS and CLSM to study the phase separation. The unique phase-separated structure endowed the semi-IPN hydrogels with excellent mechanical properties and impact damping performance.
Semi-interpenetrating (semi-IPN) hydrogels formed by the continuous interpenetration of cross-linked polymer network and linear non-crosslinked polymer with multifunctionality are widely used in biomedical and other fields. However
the negative impact of linear polymer on the homogeneity of the cross-linked network often leads to a decrease in the mechanical properties of semi-IPN hydrogels and severely limits their applications. Herein
a bioinspired hydrogen-bonding induced phase separation strategy is presented to construct the tough semi-IPN polyvinylpyrrolidone/polyacrylamide hydrogels (named PVP
x
/PAM hydrogels)
including the linear polymer polyvinylpyrrolidone (PVP) and cross-linked polyacrylamide (PAM) network. The resultant PVP
x
/PAM hydrogels exhibit unique phase separation induced by the hydrogen bonding between PVP and PAM and affected by the amount of substance of PVP. Meanwhile
the phase separation of PVP
x
/PAM hydrogels results in excellent mechanical properties with a strain of 2590%
tensile strength of 0.28 MPa and toughness of 2.17 MJ/m
3
. More importantly
the hydrogen bonding between PVP and PAM firstly disrupts to dissipate energy under external forces
so the PVP
x
/PAM hydrogels exhibit good self-recovery properties and outperform chemically cross-linked PAM hydrogels in impact resistance and damping applications. It is believed that the PVP
x
/PAM hydrogels with hydrogen-bonding induced phase separation possess more potential application prospects.
ToughSemi-interpenetrating networksPolyvinylpyrrolidone/polyacrylamideHydrogelsPhase separation
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