생분해성 지방족 폴리부틸렌 석시테이트 수지를 이용한 자망과 통발용 단일섬유의 방사기술 개발 및 물리적 특성
Development and physical properties on the monofilament for gill nets and traps using biodegradable aliphatic polybutylene succinate resin
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초록
유령어업을 최소화하고 해양생태계를 보호하기 위하여 미생물에 의해 분해되는 자망과 통발용 그물실을 방사하여 물리적 특성을 분석하였다. 이 연구에서의 방사온도와 냉각수 온도는 각각 180℃, 3℃로 하였고, 생분해성 PBS monofilament의 권취속도는 약 100m/min였다. PBS monofilament의 굵기를 ∅ 0.20, 0.30, 0.40mm 하였을 때의 건시 직선강도는 각각 35.3, 46.5, 49.7kg/mm2였고, 습시 직선강도는 건시에 비해 2.4-5.5% 감소하였다. PBS monofilament ∅ 0.20mm의 건시 매듭강도는 PE의 98.6%였다. PBS monofilament ∅ 0.30mm의 습시 직선강도는 PA의 81.8%였으며, 습시의 유연도는 PA 보다 3배정도 떨어졌다. PBS monofilament ∅ 0.40mm의 습시 직선강도는 PA의 95.3%였으며, 습시의 유연도는 PA 보다 1.6배정도 떨어졌다. 그러나 이들 2종류 그물실의 탄성회복도는 PA보다 모두 1% 더 높게 나타났다.
Abstract
This study was aimed not only to develop the gill net and trap made of biodegradable monofilaments in order to prevent a ghost fishing and to protect marine ecosystem, but also to analyze their spinning process and physical properties. Results showed that the spinning speed of biodegradable polybutylene succinate(PBS) monofilament was estimated to be approximately 100m/min when spinning temperature and cooling water temperature were adjusted at 180℃ and 3℃, respectively. The breaking loads of PBS monofilaments were estimated to be 35.3kg/mm2 at ∅0.2mm, 46.5kg/mm2 at ∅0.3mm, and 49.7kg/mm2 at ∅0.4mm in the dry condition, respectively. However, its breaking loads in the wet condition were reduced by 2.4-5.5%, compared to those in the dry condition. The knotted strength of PBS monofilament at ∅0.2mm was estimated to be 98.6% of PE in the dry condition. The breaking load of PBS monofilament at ∅0.3mm was evaluated to be 81.8% of PA, and its softness showed 3 times less than that of PA in the wet condition. The breaking load of PBS monofilament at ∅0.4mm was 95.3% of PA, and its softness showed 1.6 times less than that of PA in the wet state. However, the load elastic elongations of two kinds of monofilaments were estimated to be 1% higher than that of PA.
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