Swelling Behaviors of Super-Absorbent Hydrogel based Waste: Bacteria Bran
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ORIGINAL PAPER
Swelling Behaviors of Super‑Absorbent Hydrogel based Waste: Bacteria Bran Fan Yang1 · Jianzhong Ma2 · Yan Bao2 · Qian Zhu3 · Wenbo Zhang3 Accepted: 22 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Firstly, a newly developed bacteria brans (BB) /poly (acrylic/acrylamide/2-acrlylamido-2-methyl-1-propanesulfonic acid) (AA/AM/AMPS) hydrogel was reported, which cross-linked by N, N’-methyl-enebisacrylamide in the presence of potassium persulfate as a free radical initiator. The BB, a waste after the cultivation of the edible fungus, is composite of lignin, cellulose and other carbohydrates, which are beneficial to enhance the water absorbency properties of the super-absorbent hydrogel. Secondly, the chemical structure and morphologies of the hydrogel were characterized by ourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM) and the thermogravimetric analysis (TGA). The results confirmed that superabsorbent comprised a coarse surface and the porous network structure with carboxylate, carboxamide and sulfate. Finally, the swelling behaviors of the BB/P (AA/AM/AMPS) hydrogel have been studied, achieving favourable water absorbency properties (589 g/g). The effect of swelling behaviors of the hydrogel on the pH value and the concentration of the salt solution were also studied. This work improves the swelling behaviors of the hydrogel. Importantly, it provides the way to devise the hydrogel with environmental compatibility and low-cost, which is useful in many potential applications, such as agriculture. Keywords Hydrogels · Bacteria brans · Swelling behaviors · Environmental compatibility
Introduction Hydrogels with good water absorption and water retention properties have three-dimensional network structure because of contrasting by monomers with hydrophilic groups(−COOH, −SO3H, etc.) through physical or chemical cross-linking, which have attracted increasing attention
* Jianzhong Ma [email protected] * Yan Bao [email protected] 1
Shaanxi University of Science and Technology, College of Environmental Science and Engineering, Xi’an 710021, Shaanxi Province, China
2
Shaanxi University of Science and Technology, College of Bioresources Chemical and Materials Engineering, Xi’an 710021, Shaanxi Province, China
3
Shaanxi University of Science and Technology, Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Xi’an 710021, Shaanxi Province, China
for many applications, including agriculture [1], hygienic products [2], water treatment [3] and drug delivery. However, hydrogels remain suffer from two major limits. One is environmental problem [4]. Because most of hydrogelswere synthesised by petroleum-based polymers from petroleum which is limited with the rapid growth of society. Another is cost issue [5]. With gradually increasing the amount of super-absorbent hydrogels, the cost of hydrogels become critical. Therefore, in the past few decades, environmentfriendly and low-cost hydrog
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