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과일 껍질의 펙틴과 해조류의 알긴산을 이용한 생분해성 플라스틱 제조 및 특성 분석
남윤해,조강성,신지륜,김미란 한국과학영재교육학회 2024 과학영재교육 Vol.16 No.1
In this study, biodegradable plastics in the form of non-edible crop-based packaging materials utilizing pectin extracted from discarded fruit peels and alginic acid obtained from highly productive algae were prepared and subjected to mechanical and chemical characterization experiments for environmental protection and sustainable development. Using computational chemistry, zinc ions with higher average binding affinity to pectin and alginate were selected as the metal ions to be solidified among calcium and zinc ions used in previous studies, and five types of biodegradable plastics were prepared by varying the combination of pectin and alginate. The results showed that the combinations of [4g pectin, 4g alginic acid], [2g pectin, 6g alginic acid], and [2g pectin, 6g alginic acid] had better mechanical and chemical properties than [8g alginic acid], which was suggested in previous studies. Therefore, it seems that biodegradable plastics with 25∼50% alginic acid and pectin have better mechanical and chemical properties than alginic acid alone.
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박테리아필터링을 위한 에어-젯 스프레이기반 PCL 나노멤브레인
남윤한(Yoon Han Nam),김희경(Hee Kyeong Kim),김애진(Ae Jin Kim),장세진(Sejin Jang),이승재(Seung-Jae Lee),곽소정(So-Jung Gwak),조영삼(Young-Sam Cho),서경덕(Kyoung Duck Seo) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
Airborne and dust borne microorganism including bacteria causes infection, such as respiratory disease, skin disease, and etc. Antibacterial filters have been attracted because they can prevent infectious diseases. Previous reported methods for fabricating antibacterial filters, such as liquid dip coating, aerosol-based process, and electrospinning, have been developed. However, these methods still require complex process, and special facilities. In this study, we proposed a nanomembrane which can filter bacteria based on biodegradable polycaprolactone(PCL) via air-jet spray. To evaluate efficiency of bacterial filtering, a suspension of E. coli (Escherichia coli) was permeated through the nanomembrane for 10 minutes. As a result, it was confirmed that the nanomembrane could filter 99% of E.coli. In addition, the nanomembrane via air-jet spray would be manufactured as a large-area, low-cost, and free-form in a single process.
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