Preparation and properties of super absorbent composite resin

One new type of super absorbent composite resin that can be self-degraded was prepared by using a new crosslink reagent. It was prepared by water solution co-polymerization based on acrylamide, acrylic acid, ammonium persulfat, bentonite and pillared bentonite. Ammonium persulfat was the initiator and polyhydroxyl-Al cations which was in bentonite layers was the crosslink reagent. The pillared effect of bentonite was studied by X-ray diffraction analysis; the best dosage of pillared bentonite and initiator was studied by researching the absorption capability of distilled water and 0.9% salt solution, respectively. The self-degradation of composite resin was studied by observing the state of the composite resin gel. The pillared effect was very good. The polyhydroxyl-Al cations was introduced into the layer of bentonite. The best dosage of pillared bentonite and initiator was 2.4% and 0.34% of total monomer quality, respectively. The self-degradation of this composite resin was better than that of other super absorbent rein, At 65°C it was self-degraded completely in 25 days.