Weed & Turfgrass Science

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Chemical and Physical Characteristics of Four Weed Seed Fibers (Hemistepta lyrata, Imperata cylindrica var. koenigii, Metaplexis japonica and Typha latifolia)

지칭개, 띠, 박주가리, 큰부들 잡초종자섬유의 물리화학적 특성

  • Yoon, A Ra (Research Center for Bio-based Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology) ;
  • Lee, Min Woo (Research Center for Bio-based Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology) ;
  • Kim, Seul Ki (Research Center for Bio-based Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology) ;
  • Kim, Jin-Seog (Research Center for Bio-based Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology)
  • 윤아라 (한국화학연구원 융합화학연구본부 바이오화학연구센터) ;
  • 이민우 (한국화학연구원 융합화학연구본부 바이오화학연구센터) ;
  • 김슬기 (한국화학연구원 융합화학연구본부 바이오화학연구센터) ;
  • 김진석 (한국화학연구원 융합화학연구본부 바이오화학연구센터)
  • Received : 2014.09.22
  • Accepted : 2014.10.06
  • Published : 2014.12.31
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Abstract

In this study, we investigated several chemical and physical characteristics of 4 weed seed fibers; Hemistepta lyrata (HEMLY), Imperata cylindrica var. koenigii (IMPCK), Metaplexis japonica (METJA) and Typha latifolia (TYPLA). In chemical composition, there were 74 (TYPLA)-88.5% (METJA) of holocellulose, 17 (IMPCK)-24% (METJA) of lignin, 0.22 (METJA)-4.2% (IMPCK) of ash, 2.2 (HEMLY)-7.8% (IMPCK) of hot water extractives and 0.4 (IMPCK)-6.3% (TYPLA) of solvent extractives. Alpha-cellulose proportion to holocellulose was similar among weed seed fibers as 45-48%. The crystallinity index (CI) of raw seed fibers was 53.2 (TYPLA)-65.9% (HEMLY). However, CI of the chemical treated fibers (EDA fibers) was a little increased and showed 61.1 (IMPCK)-71.8% (METJA). The maximum thermal decomposition temperature (MTDT) of the raw seed fibers were 312, 321.8, 331.5 and $341.6^{\circ}C$ in METJA, TYPLA, HEMLY and IMPCK, respectively. But the MTDT of the EDA fibers were 327, 327, 341.7 and $360.0^{\circ}C$ in HEMLY, TYPLA, METJA and IMPCK, respectively. Taken together, they showed a similar or better characteristics compared to the reported or commercial natural fiber resourses. Accordingly, they seem to be practically applicable as renewable resources for a new natural fibers.

본 연구는 지칭개, 박주가리, 큰부들, 띠 종자섬유에 대한 간단한 화학적, 물리적 특성을 파악하고 이의 활용가능성 여부를 알아보기 위해 수행되었다. Holocellulose 함량은 건조중의 74-88.5%로서 박주가리 종자섬유가 가장 높았고 전체적으로 큰부들 줄기의 것(59.5%)보다 높은 경향이었다. 그러나 holocellulose에 대한 alpha-cellulose의 비율은 45-48%로서 종자섬유간 서로 비슷하였다. 리그닌 함량은 17.0% (띠)-24.0% (박주가리), 회분은 0.22% (박주가리)-4.2%(띠), 열수추출물은 2.2% (지칭개)-7.8% (띠), 유기용매 추출물은 0.4% (띠)-6.3% (부들) 함량을 나타내었다. Crystallinity index (CI) 분석에 있어서는 무처리 종자섬유의 경우 지칭개와 박주가리가 약 65%로서 높았고, 띠와 큰부들은 약 54%로서 상대적으로 낮았다. 그러나 화학처리후 얻어진 EDA 섬유간의 CI는 박주가리가 71.8%로서 가장 높았고 미소한 차이이지만 큰부들과 지칭개는 보다 낮아 각각 69.3%, 67.2%를 나타내었다. 한편 열분해 특성은 전형적인 lignocellulose계 패턴을 보였는데 무처리 종자섬유의 경우, 가장 높은 분해율을 나타낸 온도는($%/^{\circ}C$) 박주가리, 큰부들, 지칭개, 띠에서 각각, $312^{\circ}C$, $321.8^{\circ}C$, $331.5^{\circ}C$, $341.6^{\circ}C$로서 박주가리가 가장 낮고, 띠에서 가장 높은 편이었다. 그런데 EDA 섬유의 경우는, 지칭개, 큰부들, 박주가리, 띠에서 각각 $327^{\circ}C$, $327^{\circ}C$, $341.1^{\circ}C$, $360.0^{\circ}C$로서 띠가 가장 높은 편이었다. 이상의 결과들은 종합해 볼 때, 본실험의 종자섬유는 그 자체로 직접 이용할 수 있을 정도의 화학적, 물리적 특징을 가졌으나 일련의 화학처리를 하면 보다 우수한 품질의 섬유를 확보할 수 있으며, 이들은 여러 용도의 천연섬유 자원으로 유용하게 활용될 수 있을 것으로 판단되었다.

Keywords

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