采用异氰酸酯、醛及金属盐等对溶液聚合法制备的丙烯酸型吸水性树脂进行表面交联处理,结果表明以甲醛为表面交联剂处理后的树脂吸水速度快,入水后即分散、不结团,吸水凝胶表面干爽,加压下吸水性能好,且处理工艺简单,5g吸水树脂用0.1g左右的甲醛在室温下共置12h后即可得到综合性能优良的吸水树脂。
Isocyanates, aldehydes and metal salts were applied as surface crosslinking agent for superabsorbent polymers prepared by solution polymerization of acrylic acid. The results showed that the superabsorbent polymers treated by formaldehyde possessed good properties, including high absorption speed, easy dispersion in aqueous solution, dry surface of the gel after absorption, pretty absorbency under pressure, and simple surfacetreating process. When 5g superabsorbent polymer was treated with 0.1g formaldehyde for 12h at room temperature, the superabsorbent polymer got the optimum performance.
参考文献
| [1] | 陈昌文.高吸水性树脂的国内外发展情况及建议[J].精细与专用化学品,2001(16):3-5. |
| [2] | 徐志良,范力仁,沈上越,许剑,凌辉.表面Ca2+交联对蒙脱石/聚丙烯酸（钠）吸水保水复合材料性能的影响[J].功能材料,2004(z1):2596-2598. |
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