Preparation And Research Of Super-absorbent Acrylic Resin

In the1960s, the super absorbent resin （SAR） and oil-absorbingresin （OAR） have been developing as a novel polymer materials. With therapid economic development and improvement of people’s quality of life,as well as boost of awareness of environmental protection, the realm ofapplication of the SAR and OAR goes to expanding. increasing marketdemand, research and development work are becoming increasinglyactive. SAR, as poor salt tolerance, ion sensitive, limited ability to absorbbrine, restricts the scope of application of the SAR in the actualproduction. OAR’s absorptive capacity is not as good as the OAR’.Onefold OAR, at this stage of the absorption range of the oil, can notmeet the complex productions and living requirements. However, in allfields of oil and water is often exist at the same time, so the dual-functionabsorption materials comes into being.This thesis mainly contents: the preparation of SAR, OAR and waterand oil absorbability two functional resin, SAR salt resistance propertiesand the oil absorption of OAR, and absorption of water and oilabsorbability two functional resin.Super absorbent resin（SAR） based on inverse suspensionpolymerization was prepared by acrylic acid （AA）,2-acrylamido-2-methyl propane sulfonic acid （AMPS） and diallyldimethyl ammonium ahloride （DMDAAC） in10-liter reactor, usingN,N-methylene bisacrylamide （BIS） as crosslinking agent, potassiumpersulfate （KPS） as initiator, Span80as dispersant. Compared theproperties with the same series SAR, AQUAKEEP, prepared by a Japancompany, the result showed that: the thermal stability of the two SAR isvery congenial, and the initial decomposition temperature is almost thesame. And the absorbency ability of the two resin in deionized water and0.9%,2%,5%salt water was respectively studied, and the results showthat: with the rise of the concentration of salt water, the absorption was reduced, and compared with the Japan product, the absorbency propertyof SAR prepared in laboratory in high concentrations salt water wasbetter.The AA-AM-AMPS-DMDAAC four component copolymer ofsalt-tolerant superabsorbent resin with high absorbability in saline andhigh absorption rate was synthesized by inverse suspensioncopolymerization. Focused on studying water absorption was related todifferent mass ratio between acrylic acid and acrylamide, and the resultsshowed that when the mass ratio is m（AA）:m（AM）=4:1, the salt-resistantsuperabsorbent resin has the best water absorbing capacity. The swellingcapacity for pure water,0.9%NaCI solution,2%NaCI solution and5%NaCl solution are found to be500g.g^-1,200g.g^-1,150g.g^-1and60g.g^-1,respectively. Compared to traditional multigroup-cooperatedsuperabsorbent resin（AA/AMPS/DMDAAC） through Fourier transforminfrared spectroscopy and thermogravimetric analysis, shows that thesemonomers have linked each other and the function groups havecooperated effectively.Using lauryl methacrylate （LMA） and2-ethylhexyl methacrylate（EHMA） as monomers, styrene （St） as a functional monomer, benzoylperoxide （BPO） as initiator and divinylbenzene （DVB） as cross-linkingagent, and acetone as porogen, polyvinyl alcohol （PVA） as dispersingagent, based on polymerization, prepared the super oil absorbent resin.Investigate the properties of OAR by changing proportion of monomers（1:1，1:2，1:3，1:4）. The results show that the OAR,with monomerration2:1, has greater oil absorption.With soluble starch and butyl methacrylate （MBA） as monomers,cerium nitrate and azodiisobutyronitrile （AIBN） as the compositeinitiators, N,N-methylene bisacrylamide（BIS） and divinyl benzene （DVB）as the composite crosslinking agents, prepared the water and oilabsorbability two functional resin. The ratio of monomers, initiators andcross-linking agents were investigated in this essay. The results show that the best ratio is:（soluble starch）wt%:（MBA）wt%=3:2;(Ce⁴⁺)wt%:（AIBN）wt%=1:1;（BIS）wt%:（DVB）wt%=1:1.