Sorbitol이 결합된 아크릴계 고흡수성 수지의 합성 및 특성

김공수; 신재섭; 문용운; 이광용

Journal of the Korean Industrial and Engineering Chemistry, Vol.7, No.1, 136-144, February, 1996

Export Citation

Sorbitol이 결합된 아크릴계 고흡수성 수지의 합성 및 특성

Synthesis and Characterizations of Polyacrylic Superabsorbent Polymer Containing Sorbitol

김공수, 신재섭, 문용운, 이광용

초록

역상현탁 중합방법으로 sodium acrylate 및 아크릴산을 모노머로 사용하고 분산제로는 sucrose fatty acid ester(S-570), 증점제로는 Xanthan-gum, 가교제로는 EDGMA 및 GPGE, 개시제로는 K₂S₂O₈, 및 용매로는 사이클로헥산을 사용하여, sorbitol의 함유량을 10∼50%로 변화시키면서 sorbitol이 결합하고 있는 고흡수성 수지(SAP)를 합성하였다. 합성한 고흡수성 수지를 모노머량의 0.05∼0.40mo1%로 표면가교 시켰고, 입자형태는 구형이었으며 입자크기 분포는 177∼707㎛ 이었다. 고흡수성 수지의 흡수량은 물에 대하여는 785∼1086배 이었고, 0.9% NaCl 용액에 대해서는 50∼83배 이었다. Sorbitol의 함유랑이 증가할 수록 고흡수성 수지의 흡수량과 보수량은 감소하였으며, +5 cal/g SAP의 흡열특성을 나타내었다.

Polyacrylic super absorbent polymer(SAP) containing sorbitol was synthesized by inverse-suspension polymerization method. Sodium acrylate and acrylic acid were used as a monomer, ethylene glycol dimethacrylate(EGDMA) and glycerol polyglycidyl ether(GPGE) were used as a crosslinking agent, potassium persulfate(PPS) was used as an initiator, and cyclohexane was used as a solvent. Content of sorbitol was from 10mo1% to 50mo1% according to the mol ratio of acrylic acid monomer. The size distribution of the round shaped polymeric particle was 177∼707㎛. Absorption amount of the polymer containing sorbitol was 785 to 1086 times of the polymer weight in distilled water, was 50 to 83 times in 0.9 % NaCl solution. Absorption and retention amount of the polymer were decreased with increasing the amount of sorbitol, but the polymer has an endothermic property which is +5 cal/g SAP.

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[5] Lepoutre P, Hui SH, Robertson AA, J. Macromol. Sci.-Chem., A10, 681 (1976)

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[9] Lepoutre P, Hui SH, Robertson AA, J. Appl. Polym. Sci., 17, 3143 (1973)

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[11] Japan Patent, 昭 55-15634A (1980)

[12] Japan Patent, 平 1-167306 (1989)

[13] Japan Patent, 平 2-117903 (1990)

[14] Japan Patent, 平 5-170835 (1993)

[15] Japan Patent, 平 5-247124 (1993)

[16] Fanta GF, Burr RC, Doane M, J. Appl. Polym. Sci., 24, 2015 (1979)

[17] Morio N, Korean Patent, 86-3280A (1986)

[18] Kazumasa K, European Patent, 0.349,240A2 (1989)

[19] Ryans WT, The Nonwovens World, Winter, 83 (1993)

[20] Lee KY, Kim KS, Moon YU, Shin JS, J. Korean Ind. Eng. Chem., 6(6), 1181 (1995)

[21] Japan Patnet, 昭 61-36309A (1986)