폐종이를 통한 플라스틱 합성
|폐종이를 통한 플라스틱 합성|
Recently microplastics and disposable plastic waste have been raised seriously as an environmental destruction problem. According to Andrady (2011), microplastics are distributed in ocean and there is no enzymatic pathway available to break down the microplastic in organism. Furthermore, some of the chemicals used to produce plastics, which are toxic for human and the environment. Accordingly, efforts are processed to make products such as plastic bags, disposable machines, and straws using eco-friendly materials. However, the products made of papers or starches have some problem that mechanical properties are weak and easily wet with water. Biodegradable plastics may be a good substitute, but Polylactide (PLA) has limited utility due to its low thermal properties. For this reason, application of the PLA is difficult.
Cellulose that is the most made biomass on earth is used in a various field due to its good mechanical properties. However, we cannot disregard about environmental pollution when we extract the cellulose. This research discusses the novel environmental friendly synthetic route of plastic with thermoplastic properties by up-cycling of waste paper and application of that plastic.
Because there are three hydroxyl groups in the cellulous, they can form the strong hydrogen bonding. For this reason, the efficient dissolution of cellulose is a goal. The application of ionic liquid is a good method for dissolving of cellulose. In this research, 1-Butyl-3-methylimidazolium chloride (BMIDLC) was used as an ionic liquid. After the dissolution, alkylation of cellulose was processed. Source of alkylation were lauroyl chloride and palmitoyl chloride. To make polymer, dichloromethane was used. After the polymerization, the thickness, thermal properties, and tensile strength of the polymer were measured. After the film is made, thermal properties, load, elongation rate and biodegradability will be analyzed.
1. Andrady, A. L. (2011). Microplastics in the marine environment. Marine pollution bulletin, 62(8), 1596-1605. 2. Hallac, B. B., Sannigrahi, P., Pu, Y., Ray, M., Murphy, R. J., & Ragauskas, A. J. (2009). Biomass characterization of Buddleja davidii: a potential feedstock for biofuel production. Journal of agricultural and food chemistry, 57(4), 1275-1281. 3. Heinze, T., Schwikal, K., & Barthel, S. (2005). Ionic liquids as reaction medium in cellulose functionalization. Macromolecular bioscience, 5(6), 520-525. 4. Jarvis, M. (2003). Chemistry: cellulose stacks up. Nature, 426(6967), 611. 5. Lithner, D. (2011). Environmental and health hazards of chemicals in plastic polymers and products. 6. Yang, S. L., Wu, Z. H., Yang, W., & Yang, M. B. (2008). Thermal and mechanical properties of chemical crosslinked polylactide (PLA). Polymer Testing, 27(8), 957-963.
박창희, 어중수, 이윤정, 이태민