关键词: 高吸水性树脂, 玉米秸秆, 丙烯酸, 丙烯酰胺, 吸水率, 高吸水性树脂, 玉米秸秆, 丙烯酸, 丙烯酰胺, 吸水率

Abstract: The graft copolymer [PTCS-g-P(AA-co-AM)] was prepared by aqueous solution polymerization, with the corn straw, as the matrix, which was pretreated by the process of etherification; acrylic acid (AA) and acryl amide (AM) as monomers; persulfate as initiator and N, N'-methylene- bis-acrylamide (MBA) as crosslinking agent. The effect of synthesis conditions on water absorbency resins were studied, the resin properties of the repeat absorbing water and water-retention were also investigated, and structure and morphology of the product were characterized by Fourier transform infrared spectrometer (FTIR) and scanning electron microscope (SEM). The result showed that the superabsorbent polymer has the best water absorbency ability when was prepared it under 60℃ for 3h with the given condition: m(PTCS):m(AA)﹕m(AM)=1:5:2, the percentage of persulfate is 0.6%, the percentage of MBA is 0.2%, neutralization degree of the acrylic acid is 70%. The water absorbency of the superabsorbent polymer prepared at the optimal condition in deionized water and in 0.9% NaCl solution is about 144.04 g/g and 30.60 g/g respectively, and it also has good absorbing water and retention performance.

Key words: super absorbent polymer, corn straw, acrylic acid, acrylamide, water absorption