AC/XG-g-PAA复合高吸水树脂的制备及性能研究

Study on Preparation and Properties of AC/XG-g-PAA Composite Super Absorbent Resin

摘要:

利用溶液聚合法制备了AC/ XG-g-PAA有机-无机复合高吸水性树脂。研究了丙烯酸单体浓度、引发剂用量、丙烯酸中和度、凹凸棒粘土用量、交联剂的用量和聚合反应温度等因素对合成复合高吸水性树脂性能的影响，利用傅立叶红外光谱(FT-IR)、扫描电镜(SEM)、X-射线衍射仪(XRD)和示差扫描量热仪（DSC）对产物进行表征。结果表明：丙烯酸分子与黄原胶发生接枝共聚，凹凸棒粘土与接枝共聚物发生了有机-无机复合，制备的AC/ XG-g-PAA高吸水性树脂具有良好的吸水和抗盐性能，高温保水性能提高，接枝率达137.2%，接枝效率达83.6%，最高吸水倍率达896g/g-1 ,吸盐水倍率达126.3g/g-1 。

Abstract:

Attapulgite clay /xanthan gum-g-acrylic organic-inorganic composite super absorbent resin was prepared by solution polymerisation. The influence factors of synthesising composite super absorbent resin such as the monomer concentration of acrylic acid, initiator amount, degree of neutralization of acrylic acid, amount of AC, amount of crosslinking agent and polymerization temperature were studied .Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC) were used on characterization of the compound super absorbent resin. The results showed that: The poly-acrylic acid molecules linked to the molecular chain of xanthan gum through graft co-polymerisation, AC and the copolymer occurred organic-inorganic composite, the preparation of attapulgite clay/xanthan gum-g-acrylic acid super absorbent absorbent resin has good properties of water absorption and salt resistance,the retention performance was inproved in high temperature, percent grafting up to 137.2%grafting efficiency up to 83.6%,and the highest water absorption up to 896ｇ/ｇ-1, normal saline is up to 126.3ｇ/ｇ-1.