Effect of various environmental conditions on the swelling property of PAAm/PAAcK superabsorbent hydrogel prepared by ionizing radiation

被引:42
作者
El-Rehim, H. A. Abd [1 ]
Hegazy, El-Sayed A. [1 ]
El-Mohdy, H. L. Abd [1 ]
机构
[1] Natl Ctr Radiat Res & Technol, Cairo, Egypt
关键词
superabsorbent; radiation; polyacrylamide; fertilizer salts; water retention;
D O I
10.1002/app.22904
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Polyacrylamide/potassium polyacrylate (PAAm/PAAcK) superabsorbent hydrogels were prepared by using ionizing radiation for possible use in agricultural purposes. The influence of environmental conditions such as water quality, fertilizer salts, soil pH, and surrounding temperature on PAAm/PAAcK water absorbency and retention was investigated. The water absorbency apparently decreased with an increase in the valence and ionic strength of the salt solutions. The swelling of PAAm/PAAcK immersed in the solutions containing fertilizer of different nitrogen sources followed the order: Urea > NH4NO3 > (NH4)(2)SO4. The PAAm/PAAcK water absorbency in solutions containing different types of phosphate sources was in the order: H3PO4 > KH2PO4 > K2HPO4. However, the water absorbency of PAAm/PAAcK in the solution of different types of potassium salts followed the order: KCl > K2SO4 > K2HPO4. PAAm/PAAcK hydrogel is fully swollen at pH 6. The relation between the ability of PAAm/PAAcK to retain water against time at different temperatures was studied. As the environmental temperature increases, the water retention of PAAm/PAAcK decreases. Potential application of PAAm/PAAcK in agriculture was evaluated. (c) 2006 Wiley Periodicals, Inc.
引用
收藏
页码:3955 / 3962
页数:8
相关论文
共 38 条
[1]   Radiation synthesis of hydrogels to enhance sandy soils water retention and increase plant performance [J].
Abd El-Rehim, HA ;
Hegazy, ESA ;
Abd El-Mohdy, HL .
JOURNAL OF APPLIED POLYMER SCIENCE, 2004, 93 (03) :1360-1371
[2]  
Atkins P.W., 1994, Physical Chemistry, V5th ed.
[3]  
BAXTER L, 1986, J AM SOC HORTIC SCI, V111, P517
[4]   RUNOFF, EROSION, AND POLYMER APPLICATION IN MOVING-SPRINKLER IRRIGATION [J].
BENHUR, M .
SOIL SCIENCE, 1994, 158 (04) :283-290
[5]   Polymer effects on water infiltration and soil aggregation [J].
BenHur, M ;
Keren, R .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1997, 61 (02) :565-570
[6]   CALCIUM INHIBITION OF POLYACRYLAMIDE-GEL HYDRATION IS PARTIALLY REVERSIBLE BY POTASSIUM [J].
BOWMAN, DC ;
EVANS, RY .
HORTSCIENCE, 1991, 26 (08) :1063-1065
[7]   FERTILIZER SALTS REDUCE HYDRATION OF POLYACRYLAMIDE GELS AND AFFECT PHYSICAL-PROPERTIES OF GEL-AMENDED CONTAINER MEDIA [J].
BOWMAN, DC ;
EVANS, RY ;
PAUL, JL .
JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE, 1990, 115 (03) :382-386
[8]   INFLUENCE OF GEL ADDITIVES ON NITRATE, AMMONIUM, AND WATER-RETENTION AND TOMATO GROWTH IN A SOILLESS MEDIUM [J].
BRES, W ;
WESTON, LA .
HORTSCIENCE, 1993, 28 (10) :1005-1007
[9]  
BUCHHOLZ FL, 1994, ACS S SERIES, V573
[10]   Synthesis of fast-swelling, superporous sucrose hydrogels [J].
Chen, J ;
Park, K .
CARBOHYDRATE POLYMERS, 2000, 41 (03) :259-268