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In this study, corn starch, potassium persulfate as the initiator agent, N, N'-methylene-bis-acrylamide as a crosslinking agent, aqueous solution polymerization prepared corn starch grafted acrylic Superabsorbent. Persulfate is an initiator, the initiator efficiency and good reproducibility, the dramatic changes in the temperature in the reaction is not easy to control, industrial production; preparation process both without special production equipment without nitrogen protection, process Simple, low investment, low cost, and made a useful attempt to promote the use of a large area of ??Superabsorbent. First, corn starch grafted acrylic Superabsorbent preparation conditions. Discusses the starch milk gelatinization method, the starch concentration, the amount of monomer, the monomer and degree of the amount of initiator, the amount of crosslinking agent, reaction temperature and reaction time on the resin water absorption. By single factor and five secondary orthogonal rotation optimization experiments, deionized water ratio as an indicator to determine the optimal combination of: 12.20% starch concentration, the initiator concentration was 2.72 mL the crosslinker dosage of 0.57 mL The monomer used in an amount of 18.26 mL, 76.83% monomer and degree of water absorption rate of the obtained resin was 698 g / g. Secondly, the use of biological microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction analysis of testing means the performance of corn starch grafted acrylic Superabsorbent. The results show that: the surface of the resin can not see the obvious the starch granules, without affecting the absorbency of the resin. The main factors affecting the resin the water absorption rate is a network structure formed by crosslinking in the resin. Superabsorbent other properties, such as the suction rate, water retention, reusability, after mixing with soil water holding capacity and biodegradability. The results show that a resin prepared by the experimental liquid absorption speed faster, showed good water retention properties at a high temperature and under high pressure, the liquid-absorbent magnification by the solution of Na concentration of Ca2 influence with of Na concentration of Ca2 l lower lower on artificial blood and the artificial urinary adsorption magnification resin mixed with the soil can significantly improve the expansion ratio of the soil and water holding capacity and can effectively reduce soil moisture evaporation rate in the indoor incubator and soil solution inoculated The method can achieve a certain degree of degradation. In comparison, the degradation of the soil solution inoculation method is better than the surface of the soil degradation method. Finally, the prepared Superabsorbent applied to cabbage cultivation experiment provided a control, five treatment. The results show that: the resin can increase the rate of emergence of cabbage, the amount of superabsorbent resin 1.5 g when germination rate is 83.9 percent higher than the control 29.4 percent; resin dosage 3.0 g chlorophyll content was 31.4 for the control group, 4.98 times for the material basis of plant growth and development reserve; With the increase in the amount of resin, processing malondialdehyde content has declined. Add the MDA increased 0.5 g sample is not obvious, and the dosage decreased malondialdehyde content in the samples between 1.0 g ~ 3.0 g. Minimum dosage of 3.0 g sample malondialdehyde content, effect. This shows that the resin used in the cabbage cultivation can effectively improve the drought resistance of plants.
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