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The highly water-absorptive resin is a loose structure and low crosslink density of the hydrophilic polymer. Capable of absorbing hundreds of times or even thousands of times its own mass of water, and the absorption rate is fast, good water retention properties, even with the pressure case, it is difficult to moisture separator. Therefore, superabsorbent get a very wide range of applications in the industrial, forestry, fruit trees, gardening design and health and other fields. In this paper, the aqueous solution polymerization synthesis of kaolin superabsorbent composite Determination of the absorbency of the composite resin, influencing factors and their structure and morphology. Kaolin / potassium polyacrylate composite superabsorbent study, as raw material to the partially neutralized acrylic acid and kaolin, potassium persulfate as initiator agent, N, N-methylene-bis-acrylamide as crosslinking agent, using an aqueous solution polymerization synthesis of kaolin / potassium polyacrylate composite resin. And the degree of neutralization of the monomer, the added amount of kaolin, crosslinker, initiator dosage and monomer concentration Composite Superabsorbent influencing factors. Experimental results show that: When the neutralization degree of the monomer was 80%, the amount of initiator is 0.25%, the crosslinking agent used in an amount of 0.015%, the monomer concentration of 35% can be synthesized in a better performance of the composite superabsorbent resin, the water absorbency in distilled water and brine, respectively, up to 728g / g and 70.2 g / g. Kaolin / potassium polyacrylate - acrylamide composite superabsorbent to the partially neutralized acrylic acid, acrylamide and kaolin raw materials, potassium persulfate as initiator agent, N, N-methylene-bis-acrylamide as crosslinking agent, aqueous solution polymerization synthesis kaolin / potassium polyacrylate - acrylamide composite superabsorbent. Experimental results show that: when an amount of 6% acrylamide and the degree of neutralization of the monomer was 80%, the amount of initiator is 0.28%, and the crosslinking agent used in an amount of 0.015%, the monomer concentration was 35%, the synthesized composite type high the absorbency of the water-absorbent resin in distilled water and brine, respectively, up to 919g / g and 92 g / g. In the the kaolin / starch graft potassium polyacrylate composite superabsorbent study compared synthetic composite superabsorbent corn starch synthesis absorbent resin absorbent corn starch, cassava starch, potato starch, sweet potato starch, wheat starch grafted polypropylene potassium The performance is better than the other starches. Therefore, corn starch, partially neutralized acrylic acid, and kaolin as the raw material, potassium persulfate as initiator agent, N, N-methylene-bis-acrylamide as crosslinking agent, using an aqueous solution polymerization synthesized kaolinite / starch grafted polyacrylic acid potassium-absorbing resin. Experimental data show that a monomer concentration in corn starch amount of 10% under the conditions of 35%, the crosslinking agent used in an amount of 0.013%, 0.25% of the amount of initiator, the monomer and the degree of 80%, the crosslinking copolymerization reaction The composite water-absorbent resin were 654g / g, and 66g / g in distilled water and brine absorbency. Application of electronic scanning microscope (SEM), X-ray powder diffraction (XRD), infrared spectroscopy (IR), and thermal gravimetric analysis (TG), kaolin / potassium polyacrylate superabsorbent resin morphology analysis showed that, in the complex process kaolin structure is not changed, but in the small granular form uniformly dispersed in the polymer matrix. Kaolin occurs in the polymer matrix in a composite process with a reactive monomer, a surface graft polymerization. Adding kaolin potassium polyacrylate superabsorbent the thermal stability of the composite material are further improved. By using the three composite superabsorbent experimental tests show the soil: absorbing resin can effectively improve the water retention capacity of the soil water absorption, and also be able to enhance the inhibiting evaporation capacity and volume expansion rate of the soil, but it will not affect the growth of crops.
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