期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/srep43596
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资金
- National Research Foundation of Korea (NRF)
- Ministry of Science, ICT & Future Planning [NRF-2014M3C1B2048175, 2016R1A2B1007134]
- Ministry of Trade, Industry and Energy (MOTIE) [10067690]
- Gyeonggi Province through GRRC program in Sungkyunkwan University
- National Science Foundation [IIA-1301726]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10067690] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Office of Integrative Activities
- Office Of The Director [1301726] Funding Source: National Science Foundation
Utilization of carbon-neutral biomass became increasingly important due to a desperate need for carbon reduction in the issue of global warming in light of replacing petroleum-based materials. We used lignin, which was an abundant, low cost, and non-food based biomass, for the development of all biomass-based films and composites through reactive compatibilization with poly (lactic-acid) (PLA). Using a facile and practical route, the hydrophilic hydroxyl groups of lignin were acetylated to impose the compatibility with PLA. The solubility parameter of the pristine lignin at 26.3 (J/cm(3))(0.5) was altered to 20.9 (J/cm(3))(0.5) by acetylation allowing the good compatibility with PLA at 20.2 (J/cm(3))(0.5). The improved compatibility of lignin and PLA provided substantially decreased lignin domain size in composites (12.7 mu m), which subsequently gave transparent and UV-protection films (visual transmittance at 76% and UV protection factor over 40). The tensile strength and elongation of the developed composite films were increased by 22% and 76%, respectively, and the biobased carbon content was confirmed as 96 +/- 3%. The developed PLA/lignin composites provided 100% all-biomass contents and balanced optical and mechanical properties that could broaden its eco-friendly applications in various industries.
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