一锅法合成野豌豆淀粉基高吸水树脂

doi:10.3969/j.issn.0253-2417.2017.04.017

Abstract

Abstract: The transparent gel-like super absorbent polymers (SAP) were synthesized to utilize wild starch resources effectively. The VS-SAP were prepared by the static one-pot method through the graft copolymerization between acrylic acid (AA) and vetch starch(VS) initiated by ammonium persulfate. The reaction conditions, the foaming agent amount and added time that affect the equilibrium and real-time swelling capacity in running water were further investigated. The optimal conditions were that starch 0.3 g, water 24mL, NaOH 0.80g, APS 30mg, bisacrylamide(MBA)6mg, AA 3.6mL, respectively, including reaction at 65℃ for 30 min, then adding 0.5 g/g NaHCO₃ (based on the starch mass) and keeping for 4.5 h reaction. Under the optimum conditions, the yield of the synthesized VS-SAP was 95.7% and the VS-SAP could absorb 2 589, 604, 101 and 104 g/g water, in distilled water, running water, normal saline and artificial urine, respectively. The water absorption capacity in running water at 1 h was 257 g/g. The Fourier translation infrared spectroscopy (FT-IR) indicated that acrylic was successfully grafted onto the starch molecule chain. The iodine staining results showed that VS-SAP still retained the main molecular chains' structure of starch. The TG results indicated that the VS-SAP samples had a stronger thermal stability than original starch and poly(acrylic acid) (PAA). The SEM results showed that the surface structures were more coarse and loose after reaction.

Key words: graft copolymerization, hydrogel, cross-linking, vetch, starch

CLC Number:

TQ91
O636.1

LIU Tingguo, QIAN Liwu, HUANG Zhiliang, WU Xiaoshuo, GUO Jun, LIU Tianbao. Vetch Starch Based Superabsorbent Polymers Synthesized by One-pot Method[J]. Chemistry and Industry of Forest Products, 2017, 37(4): 115-122.

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Vetch Starch Based Superabsorbent Polymers Synthesized by One-pot Method

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