Il-Hoon Cho, Seunggeun Jeon*, Hyun-Woo Jeong*, and Sangsoo Park*,†
Department of Biomedical Laboratory Science, Eulji University, Gyeonggi-do 13135, Korea
*Department of Biomedical Engineering, Eulji University, Gyeonggi-do 13135, Korea
을지대학교 임상병리학과, *을지대학교 의료공학과
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A simple video-microscopic method for measuring the swelling ratio of superabsorbent polymer (SAP) microbeads is suggested in this study. A microbead particle was isolated from a women’s sanitary pad and was placed under a video-microscope, followed by the addition of buffered saline onto the microbead. The swelling behavior of the microbead was then videotaped and the images were captured to calculate the projected areas of the microbead for swelling ratio determination. Total of 20 microbeads were studied to measure the swelling ratio at equilibrium, and the ratio was 26.29 (±3.11), which was approximately 10% smaller than the swelling ratio determined by the conventional method, 28.50 (±1.25). Video-microscopic observation of the swelling behavior and estimation of the swelling ratio of SAP microbeads could become an effective tool for understanding the role of SAP microbeads in hygienic and medical products.
본 연구에서는 초흡수성 고분자 마이크로비드의 팽윤도를 측정하기 위한 비디오 현미경 이용법을 제안한다. 여성용 생리대에서 마이크로비드 입자를 분리하여 비디오 현미경 하에서 생리식염수를 첨가하였다. 마이크로비드의 팽윤 거동을 비디오로 녹화하고 이미지를 캡처하여 팽윤도 측정을 위한 마이크로비드의 투영면적을 계산하였다. 20개의 입자를 이용하여 투영면적으로 추정한 평형 상태에서의 팽윤도는 26.29(+3.11)로 기존 방법으로 구한 팽윤도 28.50(±1.25)보다 약 10% 작았다. 팽윤 거동의 비디오 현미경 관찰 및 마이크로비드의 팽윤도 측정은 위생용품 및 의료 제품에서 고흡수성 마이크로비드의 역할을 이해하기 위한 효과적인 방법이 될 수 있다.
Keywords: superabsorbent polymer, superabsorbent microbead, hygienic products, medical products, swelling ratio, video-microscopic method.
2023; 47(4): 440-446
Published online Jul 25, 2023
Department of Biomedical Engineering, Eulji University, Gyeonggi-do 13135, Korea