Citation: Ming Zhong, Fu-Kuan Shi, Yi-Tao Liu, Xiao-Ying Liu, Xu-Ming Xie. Tough superabsorbent poly(acrylic acid) nanocomposite physical hydrogels fabricated by a dually cross-linked single network strategy[J]. Chinese Chemical Letters, ;2016, 27(03): 312-316. doi: 10.1016/j.cclet.2015.12.020 shu

Tough superabsorbent poly(acrylic acid) nanocomposite physical hydrogels fabricated by a dually cross-linked single network strategy

1.
Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Corresponding author: Xu-Ming Xie,
Received Date: 14 October 2015
Available Online: 30 November 2015
Fund Project: This research was financially supported by the National Natural Science Foundation of China (No.21474058) (No.21474058)Tsinghua University Scientific Research Project (No.2014Z22069). (No.LK1404)

In this work, we report a facile method for the preparation of tough and highly stretchable physical hydrogels by dual cross-linking composed of vinyl-hybrid silica nanoparticles (VSNPs) as multivalent covalent cross-linking and hydrogen bonding as physical cross-linking. Poly (acrylic acid) nanocomposite physical hydrogels (NCP gels) are obtained without adding any organic chemical cross-linkers. When the content of VSNPs is 0.7 wt% (relative to the monomer), the NCP gels exhibit good mechanical properties (fracture strength=370 kPa, elongation at break=2200%) and a high swelling capacity in both deionized water (2300 g/g) and saline (220 g/g). Meanwhile, the NCP gels have good recovery ability.
- Nanocomposite physical hydrogels,
- Vinyl hybrid silica nanoparticles,
- Swelling capacity,
- Fracture strength,
- Stretchability,
- Recovery ability
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沈阳化工大学材料科学与工程学院沈阳 110142