- 學位論文
生物材料於紙模包裝塗層之應用
Applications of Biomaterial Coatings for Pulp Mold
摘要
研究以不同比例之纖維素材料(微晶纖維素(Avicel)、微纖化纖維素(MFC)和纖維素奈米微晶(CNC))、奈米高嶺土(NC)、聚乙烯醇(PVA)及乙二醛(ED)配製成塗料，以及不同比例之生質物材料(柳杉鋸屑及樹皮(CJ-S and CJ-B)、活性碳(AC)、水溶性幾丁聚醣(CH))、大豆蠟(Wax)、聚山梨醇酯80(Tween 80)及山梨糖醇單硬脂酸酯(Span 60)配製成乳化蠟塗料。透過塗布不同比例的奈米纖維素塗料以及乳化蠟塗料作為紙漿模塑的包裝塗層。塗料性質顯示，粒徑較小的材料屏障性能較佳，團聚降低，且若材料自身具成膜性，則能有更優異的性能。紙漿模塑性質顯示，塗料的纖維素添加量在10-20%時，有著較低的透氣性及水蒸氣穿透速率，乳化蠟的生質物添加量則是在15-25%。與未塗布的紙漿模塑相比，CNC添加量20%的纖維素塗料(CNC-C)與CH添加量25%的乳化蠟塗料(CHⅣ)有著優異的屏障性能，透氣性分別下降9.37±0.61 sec/100mL與64.37±10.78 sec/100mL，水蒸氣穿透速率分別下降119.61±29.80 g/m2/day與513.63±30.62 g/m2/day，在氣體滲透試驗皆能延緩5-15分鐘達到濃度平衡。在水果試驗中，與未包裝的鳳梨釋迦(Atemoya)相比，七天內，CNC-C與CHⅣ的重量損失率分別減少了2.28%與5.69%，並有效減緩果皮變化。這些結果顯示出本研究製備之纖維素與乳化蠟塗料有減緩氣體交換及水果熟成之表現，具應用於水果保鮮包材之潛力。
並列摘要
In this study, different proportions of cellulose materials (Avicel, Microfibrillated cellulose (MFC) and Cellulose nanocrystal (CNC)), Nanoclay (NC), Polyvinyl alcohol (PVA), and Ethanedial (ED) are formulated into coatings. And different proportions of biomass materials (Cryptomeria japonica sawdust and bark (CJ-S and CJ-B), Activated carbon (AC), Water soluble chitosan (CH)), Soy wax (Wax), Polyoxyethylene sorbitan monooleate 80 (Tween 80), and Sorbitan monostearate 60 (Span 60) are formulated into emulsifying wax coatings. Different coating proportions of nanocellulose coatings and emulsifying wax coatings as packaging coatings for pulp mold. The properties of the coating show that the material with a small particle size has better barrier performance. If the material has film-forming properties, it can have better performance. Compared with the uncoated pulp mold, the cellulose coating with 20% CNC content (CNC-C) and the emulsifying wax coating with 25% CH content (CHIV) have excellent barrier properties. The air permeance decreased by 9.37±0.61 sec/100mL and 64.37±10.78 sec/100mL, respectively, and the water vapor transmission rate decreased by 119.61±29.80 g/m2/day and 513.63±30.62 g/m2/day, respectively. In the gas permeability test, the concentration equilibrium can be delayed for 5-15 minutes. In the fruit test, compared with unpackaged Atemoya, the weight loss rates of CNC-C and CHIV were reduced by 2.28% and 5.69%, respectively, within seven days, and the peel change was effectively slowed down. These results show that the cellulose and emulsifying wax coatings prepared in this study can slow the gas exchange and fruit ripening and potentially be applied to fruit fresh-keeping packaging materials.