Superabsorbent hydrogel composites

Polymers for Advanced Technologies - Tập 14 Số 6 - Trang 438-444 - 2003
Kourosh Kabiri1, M. J. Zohuriaan‐Mehr1
1Superabsorbent Hydrogel Division, Department of Paint, Resin and Surface Coatings, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965‐115, Tehran, Iran

Tóm tắt

AbstractA new cost‐effective approach to enhance gel strength of superabsorbent hydrogels was invented. Superabsorbent hydrogel composites (SHCs) were prepared through an optimized rapid solution polymerization of concentrated partially neutralized acrylic acid in the presence of a crosslinking agent under normal atmospheric conditions. Kaolin was used as an inorganic component in the polymerization process to strengthen the hydrogel products. FT‐IR spectroscopy was used to confirm grafting of acrylic chains on to the surface of kaolin particles. Morphology of the products was studied by scanning electron microscopy (SEM). Compared with the kaolin‐free hydrogel (control), kaolin caused a reduced equilibrium swelling and swelling rate as low as 17–31% and 19–29%, respectively. Kaolin, however, resulted in enhanced gel strength as high as 21–35% compared to the control. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were used to study thermal properties of the composites. The SHCs exhibited higher thermal stability than the control. Meanwhile, changes in certain thermal transitions reconfirmed the chemical interaction of the acrylic chain with kaolin. These thermostabilized strengthened superabsorbent hydrogels may be considered as good candidates for agricultural application to retain more water under soil pressure. Copyright © 2003 John Wiley & Sons, Ltd.

Từ khóa


Tài liệu tham khảo

Buchholz FL, 1998, Modern Superabsorbent Polymer Technology

Shimomura T, 1994, Superabsorbent Polymers Science and Technology

10.1080/15321799408014168

10.1080/10601329908951189

10.1002/(SICI)1097-4636(199901)44:1<53::AID-JBM6>3.0.CO;2-W

10.1016/S0032-3861(00)00200-7

SmithSJ. US Patent 5 399 591 1995.

ChambersR. US Patent 5 597 873 1997.

MitchellA. US Patent 6 376 618 2002.

10.1177/096739110100900704

10.1002/pi.728

10.1002/1521-3927(20001001)21:15<1032::AID-MARC1032>3.0.CO;2-N

10.1002/1521-3927(20010301)22:6<422::AID-MARC422>3.0.CO;2-R

10.1002/app.1993.070501022

10.1002/app.1994.070540211

10.1002/app.1994.070540210

10.1016/S0032-3861(97)10236-1

10.1016/S0032-3861(98)00095-0

10.1016/S0032-3861(98)00394-2

10.1002/pi.1218

Kabiri K, 2003, Concise synthesis of fast‐swelling superabsorbent hydrogels: effect of initiator concentration on porosity and absorption rate, J. Polym. Mater.

10.1295/polymj.33.330

10.1002/(SICI)1097-4628(19990606)72:10<1349::AID-APP16>3.0.CO;2-K

Thông tin
Thông tin xuất bản

Polymers for Advanced Technologies

Tập 14 Số 6

438-444

Thông tin tác giả