Gum Arabic: A promising candidate for the construction of physical hydrogels exhibiting highly stretchable, self-healing and tensility reinforcing performances. (1st February 2018)

• Record Type: Journal Article
• Authors: Wu, Dongbei; Xu, Jingyan; Chen, Yongui; Yi, Meirong; Wang, Qigang
• Is Part Of: Carbohydrate polymers. Volume 181(2018)
• Page Start: 167
• Page End: 174
• Publication Date: 2018-02-01
• Subjects: Polymer hydrogel -- Gum arabic -- TiO2 nanoparticles -- Single network -- Healable materials; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2017.10.076
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: P ( N, N -dimethyl acrylamide)-gum arabic-TiO2 nanocomposite hydrogel was effectively synthesized. The preparation approach was one-pot, effective and facile. Gum arabic played an important role in fabrication of robust and dynamic physical hydrogel. The hydrogel exhibited highly stretchable, fatigue-resistant, healable and tensility reinforcing performances. Gum arabic was a promising candidate for hydrogel. Abstract: The preparation of tough and healable hydrogels in one step remains a big challenge throughout the field of hydrogel methodology. Herein, we fabricated a series of Poly( N, N -dimethyl acrylamide)-TiO2 -gum arabic (PDMAA-TiO2 -GA) hybrid hydrogels by simply introducing nanoparticles TiO2 and vinyl-modified gum arabic (GMAGA) into polymer networks. Without complicate molecular design and post-treating process, the hydrogel molding process was simple and effective. The hydrogel exhibited highly stretchable, self-healing and tensility reinforcing performances with the optimized compositions of 30% DMAA, 0.6% GMAGA and 0.13% TiO2 . The maximum elongation of the hydrogel after self-healing recover could reach nearly 700% after only 20 min healing time. The hydrogel could ensure 20 times continuous compressive or tensile tests without obvious deformation. Amazing was the significantly enhanced tensile modulus from 5 kPa to 40 kPa after 20 stretch-release cycles. The facile preparation and fascinating tensility reinforcing performance benefit the potential application of the carbohydrate GA in hydrogels.