• Title, Summary, Keyword: Polybutylene succinate

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Afforestation of a Brown Alga, Ecklonia cava Kjellman using a Biodegradable Polybutylene Succinate (생분해성 로프를 이용한 대형 갈조류 감태의 이식)

  • Baek, Jae-Min;Park, Seong-Wook;Hwang, Eun-Kyoung
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.42 no.5
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    • pp.523-526
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    • 2009
  • Biodegradable polybutylene succinate (BPS) multifilament were designed to degrade upon disposal by the action of afforestration of Ecklonia cava. Matured thalli of E. cava were collected at Jeju for zoospore collection and the substrate for zoospores were BPS multifilament (12 mm, 500 Td/96). The materials were made as nets of $1\;m^2$ with a cross stripes of 10 cm. The unit biodegradable nets bearing germlings of E. cava was moved into Wando where the place is conducting intensive seaweed cultivation in Korea for 5 months of nursery culture until they grew to 10 cm in length after which the nets were transplanted into the sea bed at Jeju at a depth of 12 m and the algal growth was monitored from May 2007 to December 2008. This is the first instance of using the BPS materials for seaweed afforestation to avoid any environmental problems.

The Durability of Polybutylene Succinate Monofilament for Fishing Net Twines by Outdoor Exposure Test (옥외 노출시험에 의한 PBS 단일섬유 망사의 내구성 변화)

  • Park, Seong-Wook;Kim, Seong-Hun;Lim, Ji-Hyun;Choi, Hea-Sun
    • Journal of Fisheries and Marine Sciences Education
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    • v.25 no.4
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    • pp.766-774
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    • 2013
  • Biodegradable polybutylene succinate(PBS) is a kind of environmentally friendly plastics for fisheries, because it can mitigate the ghost fishing problem caused by gill-net and trap fisheries. To evaluate durability of PBS monofilament, each of different diameter 3 types of monofilaments were spun and exposed to 56 month outdoor and then their gravity, modification of surface, breaking strength, and elongation were analysed. The gravity of PBS monofilament was estimated to be approximately 1.24 when spinning ratio from 4.8 to 6.1. PBS monofilaments did not show any crack after 56 month exposed to outdoor and load-elastic elongation curve was showed sigmoid type. Decreasing ratio of elongation was appeared in the thinnest monofilament 0.2mm diameter and breaking strength was in the thickest monofilament 0.4mm diameter. Breaking strength and elongation at break were decreased rapidly after 48 month exposed to outdoor. Breaking strength reduced linearly after 48 month exposure, while no such linear relationship was found in the case of elongation at break. In results, it was investigated that the durability of PBS monofilament nets for gillnet and trap were 24, 50 month when keep to land, respectively.

Preparation and physical properties of biodegradable polybutylene succinate/polybutylene adipate-co-terephthalate blend monofilament by melt spinning (용융방사에 의한 생분해성 PBS/PBAT 블랜드 모노 필라멘트 제조 및 물리적 특성)

  • Park, Seong-Wook;Kim, Seong-Hun;Choi, Hea-Sun;Cho, Hyun-Hok
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.46 no.3
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    • pp.257-264
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    • 2010
  • In order to improve the breaking strength and elongation of Polybutylene succinate (PBS) monofilament, the monofilament was produced by blending PBS and Polybutlyne adipate-co-terephthalate (PBAT). The PBS/PBAT blend monofilament was prepared by the melt spinning system, and the weight ratios of the compositions of PBS/PBAT was 100/0, 95/5, 90/10 and 85/15, respectively. The breaking strength, elongation, softness and crystallization of PBS/PBAT blend monofilament were analyzed by using a tensionmeter, softness measurement, X-ray diffractometer in the both dry and wet conditions. The PBS/PBAT blend monofilaments were spun in the take-up velocity of 1.19m/sec under the drawing ratio of 6.8:1 condition. The production volumes of PBS/PBAT blend monofilaments showed 20% less than that of Nylon. The breaking strength of PBS/PBAT blend monofilaments were decreased as PBAT contents increased, while elongation and softness were increased. In case of PBAT content were over 5%, the breaking strength, elongation and softness of PBS/PBAT blend monofilaments were not shown to increase in spite of increasing in PBAT contents. Based on these results, it was possible to make the monofilaments with the maximized physical properties when the PBAT contents at 5%.

Properties Evaluation of Bio-Composite by Content and Particle Size of Bamboo Flour (대나무 분말의 함량 및 입자 크기에 따른 바이오복합재의 물성 평가)

  • Lee, Sena;Lee, Byoung-Ho;Kim, Hyun-Joong;Kim, Sumin;Eom, Young Geun
    • Journal of the Korean Wood Science and Technology
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    • v.37 no.4
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    • pp.310-319
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    • 2009
  • The representative eco-friendly materials, or bio-composites, were made by incorporating biodegradable polymer of polybutylene succinate (PBS) as the matrix and bamboo flour (BF) as the natural filler. In present study, the effects of content and particle size of natural filler on the bio-composites were carried out around their mechanical, visco-elastic, and thermal properties. By the incorporation of BF, the tensile properties decreased but the viscoelastic and thermal properties revealed positive effect through interaction between the polymer and natural filler. Also, the vulnerability of interfacial adhesion between hydrophobic PBS and hydrophilic BF appeared to adversely affect the properties of bio-composites.

Weatherability of biodegradable polybutylene succinate(PBS) monofilaments (생분해성 PBS monofilament의 내후성)

  • Park, Seong-Wook;Bae, Jae-Hyun
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.44 no.4
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    • pp.265-272
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    • 2008
  • Biodegradable polybutylene succinate(PBS) is an environment friendly plastics for fisheries, because it can mitigate the ghost fishing problem caused by gill-net and trap fisheries. To evaluate photodegradability of PBS monofilament in comparison with polyamide(PA) and polyethylene(PE) monofilament, these 3 types of monofilaments were spun and exposed to ultraviolet light(UV) of weather-ometer for 900 hours, and then their modification, crystal structure, strength, and extensibility were analysed. PBS monofilament did not show any crack and maintained its crystal structure after 900 hour exposure to UV whereas PE monofilament began showing cracks and structure modification after 600 hour exposure. Under UV exposure, the strength and extensibility decreased more rapidly in PBS than in PA and PE. We estimate that gill nets made of PBS monofilament can endure for about 1 year. The breaking strength and elongation decreased linearly with the exposure time for the 3 types of monofilaments. The derived regression equations of the residual tenacity(RT, kg/$mm^2$) and the residual extensibility(RE, %) with the exposure time in year(Y) for each monofilament were; PBS : RT=48.598 - 8.6437Y($R^2=0.93$), RE=28.165 - 7.3233Y($R^2=0.98$), P A : RT=59.771 - 8.6437Y($R^2=0.98$), RE=32.198 - 5.2772Y($R^2=0.92$), P E : RT=60.898 - 5.6528Y($R^2=0.98$), RE=11.887 - 0.7188Y($R^2=0.98$).

Development of the biodegradable octopus pot and its catch ability comparison with a Polyethylene (PE) pot (생분해문어단지의 제작과 Polyethylene (PE) 문어단지와의 어획 비교)

  • Cha, Bong-Jin;Lee, Gun-Ho;Park, Sung-Uk;Cho, Sam-Kwang;Lim, Ji-Hyun
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.47 no.1
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    • pp.10-17
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    • 2011
  • Biodegradable octopus pot was developed to reduce plastic pollution problem in the sea and fishing trouble between fishermen. It can be expect to recycle other wasted biodegrade fishing gear. Experimental fishing was carried out to understand the difference in fishing efficiency between Polyethylene (PE) octopus pots and biodegradable (Polybutylene Succinate and Polybutylene adipate-co-terephthalate) octopus pots which was tried to make in this study in the sea. There were caught by 237 numbers of fishing during the experimental period. Among the 237 numbers of fishing, 160 or 67.5% were PE pots which were more than the biodegradable pots. A comparison of the monthly catches between the PE pots and biodegradable pots shows that the catches were overall higher in the PE pots than in the other pots. The result is very similar with the comparison of total catches by each type of the pots. In terms of bycatch, the number of species, amount of catches and the number of fishing with bycatch were more significant in the biodegradable pots than in the PE pots.

Catching efficiency of the biodegradable gill net for Pacific herring (Clupea pallasii) (생분해성 청어 (Clupea pallasii) 자망의 어획성능)

  • An, Heui-Chun;Kim, Seong-Hun;Lim, Ji-Hyun;Bae, Jae-Hyun
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.49 no.4
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    • pp.341-351
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    • 2013
  • Physical characteristics of PA (Polyamide) gill net and biodegradable gill net made by PBS (Polybutylene succinate) (mesh size 63mm, mesh thickness number 2, 2.5, 3) were analyzed to investigate catching efficiency of the biodegradable gill net for Pacific herring. Total 11 numbers of catching efficiency tests were carried out using commercial fishing vessel at Imwon port in Kangwon province from May to June 2013. The amount of catches were 1,535.7kg (18 species) through the catching efficiency tests and it is expected that the practicalization of biodegradable gillnet is possible because there is no difference for catches between PA gillnet and PBS gillnet. Catches of herring according to the thickness of net twine was the highest at No.2 and the thicker net twine tends to decrease the catches.

Development of the submerged heat treatment machine for PBSAT(polybutylene succinate adipate-co-terephthalate) monofilament nets and its efficiency (수중 침지식 생분해성 PBSAT 그물 열처리기 개발과 성능 분석)

  • Park, Seongwook;Kim, Seonghun;Lim, Jihyun;Choi, Haesun
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.51 no.1
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    • pp.94-101
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    • 2015
  • The heat treatment machine based on immersion was developed to reduce temperature difference during netting process and appraised it performance compared current heat treatment machine using high pressure. It was also reviewed the optimum heat treatment procedures for PBSAT monofilament net in accordance with the immersion time and temperature. The procedure was based on physical measurement such as breaking load, elongation and angle of the mesh for PBSAT monofilament. The water temperature gap of the treatment machine based on immersion was less than $1^{\circ}C$. and the energy consumption was also increased in high temperature condition. It was identified that the optimum temperature was $75^{\circ}C$ and its optimum processing time was between 15 minutes and 20 minutes to get qualified physical properties.

Effect of pMDI as Coupling Agent on The Properties of Microfibrillated Cellulose-reinforced PBS Nanocomposite (pMDI 커플링제가 마이크로피브릴 셀룰로오스 강화 PBS 나노복합재료의 성질에 미치는 영향)

  • Jang, Jae-Hyuk;Lee, Seung-Hwan;Kim, Nam-Hun
    • Journal of the Korean Wood Science and Technology
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    • v.42 no.4
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    • pp.483-490
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    • 2014
  • The effect of microfibrillated cellulose (MFC) content and coupling agent (polymeric methylene diphenyl diisocyanate, pMDI) on the properties of MFC-reinforced polybutylene succinate (PBS) nanocomposite. With increasing MFC content, tensile strength and elastic modulus were increased. More than 1.5 times in tensile strength of PBS/MFC(70/30) nanocomposite was improved by the addition of pMDI (1 phr), compared to the nanocomposite without pMDI. This trend was being significant in nanocomposite with higher MFC content. Thermal stability of the nanocomposite was increased by the addition of pMDI. These improvements is considered to be due to the improvement of MFC dispersion and interfacial adhesion between MFC and PBS matrix.

Development and physical properties on the monofilament for gill nets and traps using biodegradable aliphatic polybutylene succinate resin (생분해성 지방족 폴리부틸렌 석시네이트 수지를 이용한 자망과 통발용 단일섬유의 방사기술 개발 및 물리적 특성)

  • Park, Seong-Wook;Bae, Jae-Hyun;Lim, Ji-Hyun;Cha, Bong-Jin;Park, Chang-Doo;Yang, Yong-Su;Ahn, Heui-Chun
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.43 no.4
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    • pp.281-290
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    • 2007
  • 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 $180^{\circ}C$ and $3^{\circ}C$, respectively. The breaking loads of PBS monofilaments were estimated to be $35.3kg/mm^2$ at ${\phi}0.2mm$, $46.5kg/mm^2$ at ${\phi}0.3mm$, and $49.7kg/mm^2$ at ${\phi}0.4mm$ 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 ${\phi}0.2mm$ was estimated to be 98.6% of PE in the dry condition. The breaking load of PBS monofilament at ${\phi}0.3mm$ 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 ${\phi}0.4mm$ 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.