含N、K的羧甲基纤维素类吸水剂的制备及性能研究

Synthesis and properties of carboxymethyl cellulose absorbent containing nitrogen and potassium

以过硫酸钾为引发剂,以N,N-亚甲基双丙烯酰胺为交联剂,用羧甲基纤维素与丙烯酸、丙烯酸钠、丙烯酸钾进行自由基接枝共聚,再以氨水中和所得接枝共聚物,制备了不同含氮量的吸水树脂。研究了原料配比及氨水中和度对吸水率的影响。结果表明:在羧甲基纤维素:丙烯酸=1:10,交联剂:引发剂:羧甲基纤维素=1:3:200的条件下,聚合物的吸水性能随体系中丙烯酸中和度的提高而变强;用氨水中和制得的聚合物的吸水性能以中和度为80%时最强,吸去离子水可达563.5g/g、自来水232.5g/g、0.9%的生理盐水100.5g/g、人工尿54.5 g/g,具有相当好的耐盐性和实用性。

In presence of persulfate potassium as the initiator,N,N-dimethylene diacrylamide as crosslinking agent,super absorbent was synthesized by graft copolymerizing of Carboxymethyl Cellulose（CMC） with acrylic acid,sodium acrylate and potassium acrylate.The influences of polymerization conditions and the neutralized degree of acrylic acid on water absorbent were discussed.The results showed the absorbency of the products increases with the increase of neutralized degree of acrylic acid under the conditions that CMC∶acrylic acid=1∶10;cross linking agent∶initiator∶CMC=1∶3∶200.When the neutralized degree of acrylic acid is 80%,the super absorbent has the better property.The absorbability of the product is 563.5g/g for pure water,232.5g/g for tap water,100.5g/g for 9% normal saline,54.5 g/g for artificial urine.The super absorbent has the pretty good salt-tolerant and practicality property.