Eco-Friendly Superabsorbent Synthesis Based on Polysaccharides
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ORIGINAL PAPER
Eco-Friendly Superabsorbent Synthesis Based on Polysaccharides Mengdi Ma1 · Jean Felix Mukerabigwi1 · Ruyi Huang1 · Shaojun Lei1 · Xueying Huang1 · Yu Cao1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Superabsorbent polymers (SAPs) are a kind of materials which are widely used in many fields where the absorption of various aqueous solutions is prime importance. Given the fact that a great number of SAPs available on the global market are made from the poorly degradable and expensive materials, recently, there has been increasing interest in looking for low-cost and environmental friendly solutions in SAP production industry. In this study, three types of hybrid SAPs composites were synthesized through the graft polymerization of acrylic acid (AA) into three kinds of natural polysaccharides backbone chain, separately, which are: Hydroxyethyl cellulose (HEC), Xyloglucan (XG), and Guar gum (GG) in an aqueous solution, with ammonium persulfate (APS) as the initiator, N,Nʹ-methylenebisacrylamide (MBA) as the cross-linker, and diatomite clay as an inorganic nano-filler. The FTIR and SEM characterization results suggested that three kinds of hybrid SAP composites were successfully synthesized with high porosity on the surface. The study about the capacity of water absorbent revealed that the optimized swelling ratios of the three superabsorbent composites (HEC-g-PAA/diatomite, XG-g-PAA/diatomite, and GG-g-PAA/diatomite) are 1174.85 g ⋅ g−1 , 1057.06 g ⋅ g−1 , and 692.83 g ⋅ g−1 , respectively. In addition, the effect of each parameter such as polysaccharide species and the content of polysaccharide, initiator, cross-linker, diatomite and the degree of neutralization toward the water absorbency capacity of the obtained SAP were determined and discussed. Keywords Polysaccharides · Superabsorbent · Diatomite · Water absorbency · Water retention
Introduction Superabsorbent polymers (SAPs) are a class of hydrophilic materials and three-dimensional network systems which can absorb and retain large quantities of water and other aqueous solutions without dissolving [1, 2]. Since Haraguchi prepared for the first time a superabsorbent polymer (SAP) based on poly(NIPAAm)-montmorillonite, scientists showed great interest in these polymer materials [3] due to their unique properties such as swell-ability, mechanical [4], thermal stability, water retention capacity, etc. Moreover, these excellent features have expanded a wide scope of application in various fields, especially in medicine (drug delivery [5,
Mengdi Ma, Jean Felix Mukerabigwi and Ruyi Huang have contributed equally to this work. * Yu Cao [email protected] 1
Key Laboratory of Pesticide and Chemical Biology (Ministry of Education), College of Chemistry, Central China Normal University, Wuhan 430079, People’s Republic of China
6], hemostatic wound dressing [7–9], tissue engineering [10, 11]), agriculture field [12, 13] and so on. The conventional superabsorbent materials are based on fully synthetic petroleum-b
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