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Articles in press
Poly-lactic acid와 목분으로 제조한 바이오복합재에서 첨가제로 사용된 편백나무 수피 및 피마자왁스가 강도와 치수안정성에 미치는 영향
Effect of cypress wood bark and hydrogenated castor oil used as an additive on the strengths and dimensional stability of bio-composites fabricated with poly-lactic acid and wood powder
양인(Yang, In)1
이경언(Lee, Kyung Uhn)1
최시연(Choi, Siyeun)1
이영규(Lee, Young-kyu)2
권오경(Kwon, Ohkyung) 2
최원실(Choi, Wonsil)2
최준원(Choi, Joon weon)3
오세창 1†
1서울대학교 그린바이오과학기술연구원, 2서울대학교 농생명과학공동기기원, 2서울대학교) 농생명과학공동기기원, 3서울대학교 국제농업기술대학원, 1Daegu University Forest resources
In Press, Journal Pre-proof, Available online 1 May 2025
Abstract
본 연구는 poly-lactic acid(이하 PLA)와 목분을 이용한 bio-composites 제조에 있어 첨가제로 사용된 편백나무 수피(CYP-B)와 피마자왁스(HCO)가 강도 및 치수안정성에 미치는 영향을 조사하기 위하여 수행하였다. 충전제로 radiata pine 목분(RDP)을 사용하여 제조한 composites의 인장강도는 CYP-B의 영향을 받지 않았다. 반면 활엽수 잡목 목분(MIX)에 CYP-B를 composites의 전체 중량 대비 2.5 wt% 첨가하여 제조한 시편의 인장강도는 증가하였으나, 5 wt%의 CYP-B를 첨가하여 제조한 시편에서는 감소하여 첨가제없이 제조한 시편과 차이가 없었다. 충격강도는 무첨가제로 제조한 시편과 비교하여 100 mesh 표준망체를 통과한 RDP(< 0>3.0 KJ/m2) 및 수분흡수율(<8.0%) 기준을 만족하여 다양한 용도의 생분해성 플라스틱 소재로 적용이 가능할 것으로 판단된다.
This study was conducted to investigate the effect of CYP-B and HCO used as an additive on the mechanical strength and dimensional stability of bio-composites fabricated with PLA and wood powder. Tensile strength of the PLA-based composites fabricated with RDP (PLA/RDP), which was used as a filler, was not affected by the addition of CYP-B. On the other hand, tensile strength of the PLA-based composites made with MIX (PLA/MIX) increased with the addition of 2.5 wt% CYP-B based on the total weight of the composites. When the content of the CYP-B increased to 5 wt%, the tensile strength did not differ from one of the PLA/MIX fabricated without any additives. Impact strengths of the PLA/RDP made with the RDP of < 0> 0.150 mm and HCO of < 0>3.0 KJ/m2) and water absorption rate (<8.0%) designated by the National Institute of Forest Science. It is thought that the composites have a potential as a raw material for the production of bio-degradable plastics.
