凹凸棒/淀粉接枝AM-AMPS纳米复合吸水材料的制备及表征

Preparation and characterization of attapulgite/starch grafted AM-AMPS superabsorbent nanocomposite

在反应温度为30℃,引发剂质量分数为0.02%,交联剂质量分数为0.02%,反应时间为10 min的条件下,原位插层聚合制备了凹凸棒/淀粉接枝AM-AMPS纳米复合材料。通过正交实验研究了复合材料在蒸馏水和质量分数为2%盐水中的吸水倍率的优化工艺条件。通过红外光谱研究发现,复合材料形成了致密的柱状网络结构,凹凸棒与高分子基体有较多粘连。X射线衍射(XRD)结果发现,复合材料中凹凸棒片层(001)面的层间距增大到2.13 nm,形成了剥离型纳米插层复合吸水材料。

Attapulgite/starch grafted AM-AMPS superabsorbent nanocomposite is prepared by in situ intercalation polymerization under the following condition： 30℃ of reaction temperature, 0. 02% mass fraction of initiator and 10 minutes of reaction time. The water absorbency of the obtained superabsorbent nanocomposite in distilled water and 2% salt solution is optimized by the orthogonal experiment. The result of IR shows that the nanocomposite forms the compact columnar network structure. There is much adhesion between attapulgite and polymer matrix. The result of XRD show that layer to layer spacing between attapulgite sheet layers （001） increases to 2. 13 nm and forms the peelable type superabsorbent intercalated nanocomposite.