Inverse Suspension Of Hydrophobic Type Water Absorbing Resin Prepared By The Research

Starch graft superabsorbent is a new functional polymer materials.They are widely used in the petroleum industry, agriculture, health and other fields. In this paper, soluble starch, starch, acrylamide (AM),2-acrylamide-based-2-methyl propane sulfonic acid (AMPS) as the basic raw material synthesized superabsorbent by inverse suspension. On this basis, were added to the styrene and butyl methacrylate as a hydrophobic monomer, synthesized hydrophobic absorbent resin, Study the dispersion of the reaction system, the resin absorbent (salt) rate of the reaction factors, infrared characterization of reaction products and scanning electron microscopy, analyzed product performance and applicationMain contents and conclusions are as follows:(1)Synthetic starch graft AM/AMPS super absorbent resin suitable conditions as follows:The amount of dispersant is0.8-1.2%of the total oil and water, oil-water ratio is2.5:1, the reaction time is3h, the reaction temperature is60℃, the amount of initiator is0.5%of the total monomer, the amount of crosslinking agent is0.03%of the total monomer, starch:AM:AMPS is1:2.5:1,.The water absorbency of the absorbent resin is71.49g/g. The brine absorbency is16.24g/g.(2) a small amount of hydrophobic monomer can improve the water absorbency of the absorbent resin, styrene or butyl methacrylate content of25%available water absorption rate is slow, and hydrophobic absorbent resin of the absorbent longer periods of time. The styrene Superabsorbent appropriate reaction conditions the amount of initiator was0.5%-0.6%of the total monomer, Amount of crosslinking agent is0.02%of the total monomer; butyl methacrylate absorbent resin suitable reaction conditions for the initiator dosage is0.5%of the total monomer, Amount of crosslinking agent is0.03%-0.04%of the total monomer(3) IR spectra show that the synthetic product with the expected characteristic absorption peak, to prove the synthetic products of the expected product.(4) Scanning electron microscope, the surface of the hydrophobic absorbent resin as compared with ordinary smooth, absorbent resin surface area smaller slow down the absorption rate.(5) Hydrophobic absorbent resin has a water absorption for a long time, has a certain temperature and salt tolerance and stability, suitable for water shutoff in oil field depth profile control operations.