Research on biodegradable bioplastic, an alternative to petroleum-based plastics, is being conducted worldwide to solve the seriousness of environmental pollution caused by indiscriminate use of disposable plastics and problems caused by microplastics. Food garbage bags, one of the disposable plasti...
Research on biodegradable bioplastic, an alternative to petroleum-based plastics, is being conducted worldwide to solve the seriousness of environmental pollution caused by indiscriminate use of disposable plastics and problems caused by microplastics. Food garbage bags, one of the disposable plastics, are transported to a treatment facility after removing the bag and used for compost and feed. In the process of removing the bag, the bag may not be removed properly or the bag may exist in the form of microplastics. To solve this problem, sodium alginate-based biodegradable food garbage bags (SAFB) materials containing crosslinking agents containing stearic acid were developed. The sodium alginate-based food garbage bag (SAFB) was made by immersing a film composed of sodium alginate and stearic acid in a calcium lactic acid solution to induce transformation through calcium bonding. Sodium alginate-based food garbage bags showed changes in tensile strength (TS), breaking height (E), moisture absorption, swelling, and contact angle according to the combination of stearic acid (1, 3, 5, 8, 10%), and stearic acid showed a rough surface in morphological measurements. The rough surface exhibited an appropriate mixing with stearic acid, ultimately improving hydrophobicity. This could be confirmed through a water absorption experiment. In addition, the combination of stearic acid and sodium alginate increased the breaking height and confirmed that it was similar when comparing the breaking height with the existing food garbage bag. The interaction between sodium alginate and stearic acid suggests that the generated food garbage bags may exhibit similar physical properties to existing food garbage bags. In conclusion, the experimental results show that 10SAS is the most stable and excellent choice as a material for food garbage bags. It also suggests that it can be expanded to various industrial materials beyond food garbage bags.
Research on biodegradable bioplastic, an alternative to petroleum-based plastics, is being conducted worldwide to solve the seriousness of environmental pollution caused by indiscriminate use of disposable plastics and problems caused by microplastics. Food garbage bags, one of the disposable plastics, are transported to a treatment facility after removing the bag and used for compost and feed. In the process of removing the bag, the bag may not be removed properly or the bag may exist in the form of microplastics. To solve this problem, sodium alginate-based biodegradable food garbage bags (SAFB) materials containing crosslinking agents containing stearic acid were developed. The sodium alginate-based food garbage bag (SAFB) was made by immersing a film composed of sodium alginate and stearic acid in a calcium lactic acid solution to induce transformation through calcium bonding. Sodium alginate-based food garbage bags showed changes in tensile strength (TS), breaking height (E), moisture absorption, swelling, and contact angle according to the combination of stearic acid (1, 3, 5, 8, 10%), and stearic acid showed a rough surface in morphological measurements. The rough surface exhibited an appropriate mixing with stearic acid, ultimately improving hydrophobicity. This could be confirmed through a water absorption experiment. In addition, the combination of stearic acid and sodium alginate increased the breaking height and confirmed that it was similar when comparing the breaking height with the existing food garbage bag. The interaction between sodium alginate and stearic acid suggests that the generated food garbage bags may exhibit similar physical properties to existing food garbage bags. In conclusion, the experimental results show that 10SAS is the most stable and excellent choice as a material for food garbage bags. It also suggests that it can be expanded to various industrial materials beyond food garbage bags.
주제어
#biodegradable food garbage bag natural polymer sodium alginate stearic acid 생분해 플라스틱 음식물 쓰레기 봉투 천연고분자 알긴산나트륨 스테아르산
학위논문 정보
저자
이우석
학위수여기관
Graduate School, Yonsei University
학위구분
국내석사
학과
Department of Chemical and Biomolecular Engineering
지도교수
Tai Gyu Lee
발행연도
2024
총페이지
vii, 67장
키워드
biodegradable food garbage bag natural polymer sodium alginate stearic acid 생분해 플라스틱 음식물 쓰레기 봉투 천연고분자 알긴산나트륨 스테아르산
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