커피 부산물을 활용한 필름 제조 방법 및 품질 특성 연구 = A Study on Film Manufacturing Methods and Quality Characteristics Using Coffee By-Products

다국어 초록 (Multilingual Abstract)

As coffee consumption increases, coffee extraction's by-products increase. Research on coffee by-product recycling is fundamental as social costs and environmental problems arise from the course of coffee processing, estimated to be 270,000 tons per year. This study attempted to confirm the possibility of an eco-friendly food packaging material by solvating cellulose from spent coffee grounds. For cellulose solubility, delignification and TEMPO (2,2,6,6- tetramethylpiperidin-1-oxyl) oxidation treatment were performed. An optimal plasticizer (glycerol) and a crosslinking agent (cinnamaldehyde) were added to the film-forming solution for film manufacturing, while physical treatment (high-pressure treatment, 276 MPa, 10 times) was done to improve physical properties. Then, the film was dried by a solution-casting method. Physical properties of food packaging materials such as tensile strength, elongation, water-solubility, thickness, and chromaticity were measured. In particular, the film to which 1.5% glycerol was added showed the highest value among the physical properties of the dried film. These results indicate that TEMPOSCG films have potential as eco-friendly food packaging materials in the food industry.

참고문헌 (Reference)

1 이지영 ; 박태웅 ; 김은혜 ; 조해민 ; 김철환 ; 김태영 ; 허용대 ; 이종현 ; 김준규, "펄프 종류와 기계적 처리조건에 의한 셀룰로오스 나노섬유의 특성 및 탈수성 평가" 한국펄프·종이공학회 49 (49): 126-135, 2017

2 홍현선 ; 김율이 ; 오민주 ; 이유미 ; 이혜지 ; 차은서, "커피 추출 폐기물 재활용 현황과 기술 동향 분석" 한국폐기물자원순환학회 35 (35): 587-599, 2018

3 정명수 ; 이왕현 ; 유영선 ; 김혜영 ; 박기문, "복합분해성 플라스틱 식품포장 필름의 제조 및 분해성" 한국식품과학회 35 (35): 877-883, 2003

4 유영선 ; 오유성 ; 홍승회 ; 최성욱, "국내외 바이오 플라스틱의 연구개발, 제품화 및 시장 동향" 한국청정기술학회 21 (21): 141-152, 2015

5 최한나 ; 이태상 ; 양지우 ; 이승구, "가소제 및 가교제에 의해 개질된 대두단백질의 특성" 한국접착및계면학회 12 (12): 73-80, 2011

6 Isogai A, "TEMPO-Oxidized Cellulose Nanofibers" 3 (3): 71-85, 2011

7 Murthy PS, "Sustainable Management of Coffee Industry By-Products and Value Addition-A Review" 66 : 45-58, 2012

8 Campos Vega R, "Spent Coffee Grounds: A Review on Current Research and Future Prospects" 45 (45): 24-36, 2015

9 Caetano N, "Spent Coffee Grounds for Biodiesel Production and Other Applications" 2014

10 Abdul Khalil HPS, "Production and Modification of Nanofibrillated Cellulose Using Various Mechanical Processes : A Review" 99 : 649-665, 2014

11 Isogai A, "Preparation of Polyuronic Acid from Cellulose by TEMPO-Mediated Oxidation" 5 (5): 153-164, 1998

12 Evode N, "Plastic Waste and Its Management Strategies for Environmental Sustainability" 4 : 100142-, 2021

13 조미정 ; 박병대, "Nanocellulose를 이용한 나노복합재의 최근 연구 동향" 한국목재공학회 38 (38): 587-601, 2010

14 Klemm D, "Nanocelluloses: A New Family of Nature-Based Materials" 50 (50): 5438-5466, 2011

15 Herrick FW, "Microfibrillated Cellulose: Morphology and Accessibility" Undefined 1983

16 Turbak AF, "Microfibrillated Cellulose, a New Cellulose Product: Properties, Uses, and Commercial Potential" 37 : 815-827, 1983

17 Ragauskas AJ, "Lignin Valorization: Improving Lignin Processing in the Biorefinery" 344 (344): 1246843-, 2014

18 Saito T, "Homogeneous Suspensions of Individualized Microfibrils from TEMPO-Catalyzed Oxidation of Native Cellulose" 7 (7): 1687-1691, 2006

19 Sun JX, "Fractional Extraction and Structural Characterization of Sugarcane Bagasse Hemicelluloses" 56 (56): 195-204, 2004

20 Hietala M, "Extrusion Processing of Green Biocomposites: Compounding, Fibrillation Efficiency, and Fiber Dispersion" 131 (131): 2014

21 Lim KP, "Dissolving Pulp Manufacture :Pure Cellulose Making from the Lifnocellulosic Materials" 8 (8): 608-621, 1997

22 Kumar R, "Comparison of Laboratory Delignification Methods, Their Selectivity, and Impacts on Physiochemical Characteristics of Cellulosic Biomass" 130 : 372-381, 2013

23 Saito T, "Cellulose Nanofibers Prepared by TEMPO-Mediated Oxidation of Native Cellulose" 8 (8): 2485-2491, 2007

24 Nam GW, "Analyses for Current Research Status for the Coffee By-product and for Status of Coffee Wastes in Seoul" 26 (26): 14-22, 2017

25 Mussatto SI, "A Study on Chemical Constituents and Sugars Extraction from Spent Coffee Grounds" 83 (83): 368-374, 2011