有机凹凸棒粘土的制备及复合高吸水性树脂的性能

有机凹凸棒粘土的制备及复合高吸水性树脂的性能;凹凸棒粘土;有机改性;高吸水性树脂

Study on Preparation of Organo-attapulgite Clays and Properties of Superabsorbent Composites

Organo-attapulgite clays were prepared by means of mechanical stirring and ultrasonic treatment in a hexadecyltrimethylammonium bromide ( HTAB) and attapulgite clay mixture solution. The attapulgite clay and organo-attapulgite clays were characterized by using XRD, FTIR, SEM and TEM techniques. The results show that the HTAB cations were adsorbed on the surface of attapulgite needles, and dispersion of the organo-attapulgite clays showed nano-dimension. Organic contents of the two organo-attapulgite clays prepared by either mechanical stirring or ultrasonic treatment under the same conditions were 5. 12% and 2. 98% , respectively. The two organo-attapulgite clays were used for the preparation of organic-inorganic hybrid superabsor-bents. When the clay content was 10% , the water absorbencies of the two resulting superabsorbent composites reached 3 820 g/g and 3 323 g/g , respectively, which are higher than that of superabsorbent composite prepared with untreated attapulgite clay(2 872 g/g).