기계적 물성 및 염료 흡착 특성 강화를 위한 알지네이트, 폴리아크릴아미드, 셀룰로스 나노크리스탈로 구성된 이중망상 나노복합체 하이드로겔 비드의 제조 (Facile Fabrication of Double-Network Nanocomposite Hydrogel Beads of Alginate/Polyacrylamide/Cellulose Nanocrystals with Enhanced Mechanical and Dye-Adsorption Performances)

서지정보

· 발행기관 : 한국섬유공학회
· 수록지 정보 : 한국섬유공학회지 / 59권 / 6호 / 329 ~ 336페이지
· 저자명 : 정지훈, 김진경, 최윤형, 이보람, 김용현, 엄영호

초록

Herein, double-network (DN) hydrogel beads of calcium alginate/polyacrylamide(PAAm) were synthesized, and their dye adsorption and mechanical performanceswere enhanced by incorporating cellulose nanocrystal (CNC). The DN hydrogel beads wereprepared via two-step procedures: free-radical polymerization of AAm in oil bath at 90 °Cand ionotropic crosslinking of alginate in calcium chloride solution. The nanocompositeDN beads were fabricated at the CNC contents of 0.5-2 wt% with respect to the polymeramount. Whereas CNC had insignificant effect on the bead structure, it significantlyimproved both mechanical properties and dye adsorption capacity. Neat and nanocompositebeads exhibited the diameter, weight, and water content of approximately 3.3 mm,0.04 g, and 88%, respectively, irrespective of the CNC amount. In the dye adsorption,whereas neat hydrogel beads exhibited 19.7% dye removal for the immersion time of 180min, nanocomposite beads with 1.5 wt% CNC exhibited a 1.8-fold increased dye removalefficiency (35.3%). In addition, nanocomposite beads with 1.0 wt% CNC exhibited 1.8- and3.8-fold increased compressive modulus and strength (9.0 and 3.0 MPa) compared withthose of neat beads (4.9 and 0.8 MPa). Consequently, the DN hydrogel beads with the highestperformances were obtained at the CNC content of 1.0-1.5 wt%.

영어초록

Herein, double-network (DN) hydrogel beads of calcium alginate/polyacrylamide(PAAm) were synthesized, and their dye adsorption and mechanical performanceswere enhanced by incorporating cellulose nanocrystal (CNC). The DN hydrogel beads wereprepared via two-step procedures: free-radical polymerization of AAm in oil bath at 90 °Cand ionotropic crosslinking of alginate in calcium chloride solution. The nanocompositeDN beads were fabricated at the CNC contents of 0.5-2 wt% with respect to the polymeramount. Whereas CNC had insignificant effect on the bead structure, it significantlyimproved both mechanical properties and dye adsorption capacity. Neat and nanocompositebeads exhibited the diameter, weight, and water content of approximately 3.3 mm,0.04 g, and 88%, respectively, irrespective of the CNC amount. In the dye adsorption,whereas neat hydrogel beads exhibited 19.7% dye removal for the immersion time of 180min, nanocomposite beads with 1.5 wt% CNC exhibited a 1.8-fold increased dye removalefficiency (35.3%). In addition, nanocomposite beads with 1.0 wt% CNC exhibited 1.8- and3.8-fold increased compressive modulus and strength (9.0 and 3.0 MPa) compared withthose of neat beads (4.9 and 0.8 MPa). Consequently, the DN hydrogel beads with the highestperformances were obtained at the CNC content of 1.0-1.5 wt%.

참고자료

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