• 제목/요약/키워드: synthetic resin

검색결과 208건 처리시간 0.019초

제지 슬러지 - 합성 섬유 - 목섬유 복합재의 개발 (A Study On Paper Sludge - Synthetic Fiber - Wood Fiber Composites)

  • 이필우;이영규;김현중
    • Journal of the Korean Wood Science and Technology
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    • 제30권1호
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    • pp.1-10
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    • 2002
  • 제지 공정중에서 발생하는 슬러지의 효율적인 활용 방안중의 하나로써 목질보드 원료 대체 재료로써의 그 가능성을 평가하기 위하여 제지 슬러지, 합성 섬유, 목섬유의 혼합비를 각각 5:5:90, 15:15:70, 25:25:50으로 PMDI와 요소수지 접착제를 사용하여 목표비중 0.7, 0.8, 0.9인 복합재를 제작하여 물리적 및 기계적 성질을 측정한 결과 제지 슬러지와 합성 섬유를 30%~50%를 혼합하여 복합재를 제조하여도 기존의 보드와 비교하여 손색이 없는 제품을 생산할 수 있다고 판단되었다.

시판용 접착제의 지류보존처리 적합성 판단을 위한 열화 특성 연구 (A Study of the Aging Properties of the Common Synthetic Resin Adhesives for Paper Conservation Purposes)

  • 성연심;염인경
    • 보존과학회지
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    • 제28권4호
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    • pp.387-394
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    • 2012
  • 전문적인 보존시설이 없는 대부분의 도서관에서는 손상된 도서의 간단한 수선 처리 및 응급조치 시 일반시판용 합성수지 접착제를 사용하고 있고, 이는 크게 PVAc 계열(Pa), 아크릴 계열(Ac)과 PVP 계열(Pv)로 나눠진다. 국립중앙도서관 자료보존실에서 사용하고 있는 보존용 합성수지 접착제(Pa-1)와 일반시판용 합성수지 접착제 중 대표적인 접착제를 골라 열화특성을 연구하기 위해 인공열화를 진행한 뒤, 약 한 달 동안 산성도(pH)와 색도를 측정하였다. 산성도 실험 결과에서 Pa-1(pH 7~7.5)과 Ac-2(pH 6.5~8)는 보존처리에 적합한 범위를 나타내었다. 색도실험에서 황변도를 나타내는 ${\Delta}b^*$는 Pa-1

Performance evaluation of nitrate removal in high TDS wet scrubber wastewater by ion exchange resin with dissolved air flotation (DAF) process

  • Kim, Bongchul;Yeo, Inseol;Park, Chan-gyu
    • Membrane and Water Treatment
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    • 제13권1호
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    • pp.1-6
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    • 2022
  • The regulations of the International Maritime Organization (IMO) have been steadily strengthened in ship emissions. Accordingly, there is a growing need for development of related technologies for the removal of contaminants that may occur during the treatment of SOx and NOx using a wet scrubber. However, this system also leads to wastewater production when the exhaust gas is scrubbed. In this research, we evaluated the performance of an ion selective resin process in accordance with scrubber wastewater discharge regulations, specifically nitrate discharge, by the IMO. Accelerated real and synthetic wastewater of wet scrubbers, contained high amounts of TDS with high nitrate, is used as feed water in lab scale systems. Furthermore, a pilot scale dissolved air flotation (DAF) using microbubble generator with ion exchange resin process was combined and developed in order to apply for the treatment of wet scrubber wastewater. The results of the present study revealed that operating conditions, such as resin property, bed volume (BV), and inlet wastewater flow rate, significantly affect the removal performance. Finally, through a pilot test, DAF with ion exchange resin process showed a noticeable improvement of the nitrate removal rate compared to the single DAF process.

Styrene 위험물을 포함한 합성수지 흡착제에 의한 우라늄(VI) 이온의 흡착 (Adsorption of Uranium (VI) Ion on Synthetic Resin Adsorbent with Styrene Hazardous Materials)

  • 김준태
    • 공업화학
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    • 제20권2호
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    • pp.165-171
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    • 2009
  • 1%, 2%, 8% 및 16%의 가교도를 가진 스타이렌(제4류 위험물 중 제2석유류) 디비닐벤젠 공중합체에 1-aza-15-crown-5 거대고리 리간드를 치환반응으로 결합시켜 수지를 합성하였으며, 이들 수지의 특성을 염소 함량, 원소 분석, 열 중량 분석, 비표면적(BET), 그리고 적외선 분광법으로 확인하였다. 수지 흡착제에 대한 금속 이온의 흡착에 미치는 pH, 시간, 수지의 가교도 그리고 용매의 유전상수에 따른 영향들을 조사한 결과 금속 이온들은 pH 3 이상에서 큰 흡착율을 보였으며, 금속 이온들의 흡착 평형은 2 h 정도였다. 한편, 에탄올 용매에서 수지에 대한 흡착 선택성은 우라늄$(UO_2^{2+})$ > 납$(Pb^{2+})$ > 크롬$(Cr^{3+})$ 이온이었고, 금속 이온의 흡착력은 1%, 2%, 8% 및 16%의 가교도 순이며, 용매의 유전상수 크기에 반비례하였다.

이성분계 혼합 폴리우레탄 수분산체의 제조 및 접착 특성 연구 (Preparation and Adhesion Characteristics of Binary Blended Waterborne Polyurethane)

  • 김은지;백인규;박재형
    • 접착 및 계면
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    • 제19권1호
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    • pp.5-12
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    • 2018
  • 본 연구는 선처리제 공정을 생략하고 우수한 접착 특성을 가지는 합성피혁용 스킨(skin) 수지제조에 관한 것으로 이성분계 혼합 폴리우레탄 수분산체를 제조하여 이에 대한 선처리제(primer)를 생략한 접착 시편의 접착특성을 평가하는 것이다. 이성분계 혼합 폴리우레탄 수분산체의 제조는 에스터(ester)계 폴리우레탄 수지(PU-T)와 카보네이트(carbonate)계 폴리우레탄 수지(PU-C)를 각각 합성하고 이를 배합함으로써 최종 수지를 얻었다. 선처리제를 생략한 접착시편의 접착강도 측정결과, 우수한 상태접착강도 (Ethylene vinyl acetate(중창): $4.2kg_f/cm$, 고무(겉창) : $4.4kg_f/cm$)를 가짐을 확인할 수 있었다. 이는 신발 제조 공정에서 필수불가결하게 사용되었던 선처리제(primer) 공정을 생략가능하게 함으로써 공정의 단축과 선처리제(primer)에서 발생되는 휘발성유기화합물 (VOCs)의 감소를 가져와 친환경적인 장점을 지닌다.

Cryptand 22 합성수지에 의한 희토류 금속들의 흡착특성과 용리행동 (Adsorption Characteristic and Elution Behavior of Rare Earth Metals by Cryptand 22 Synthetic Resin)

  • 노기환;김준태
    • 환경위생공학
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    • 제11권1호
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    • pp.17-25
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    • 1996
  • Resins with cryptand 22 macrocyclic ligand attached to chloromethylated styrene-1,4-divinylbenzene by substitution reaction were prepared and the effect of pH, metal concentration and cross-linkage of the matrix on the adsorption for $UO_2^{2+}$, $Cd^{2+}$ and $Sm^{3+}$ was investigated. The metal ion was not adsorbed on the resins pH range below 3 but above pH 4 fast adsorption behavior was showed. The resin selectivity determined in ethanol matrix was in increasing order $UO_2^{2+}{\;}>Cd^{2+}{\;}Sm^{3+}$. In addition, these metal ion could be separated on the column packed with 1% crosslinked resin by pH 2.5 $HNO_3$ as an eluent.

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Biodegradable Starch-Based Resin Reinforced with Continuous Mineral Fibres-Processing, Characterisation and Mechanical Properties

  • Wittek, Thomas;Tanimoto, Toshio
    • Advanced Composite Materials
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    • 제18권2호
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    • pp.167-185
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    • 2009
  • Environmental problems caused by extensive use of polymeric materials arise mainly due to lack of landfill space and depletion of finite natural resources of fossil raw materials like petroleum or natural gas. The substitution of synthetic petroleum-based resins with natural biodegradable resins appears to be one appropriate measure to remedy the above-mentioned situation. This study presents the development of a composite that uses environmentally degradable starch-based resin as matrix and natural mineral basalt fibres as reinforcement, and investigates the fibre's and the composite's mechanical properties. The tensile strength of single basalt fibres was verified by means of single fibre tensile tests and statistically investigated by means of a Weibull analysis. Prepreg sheets were manufactured by means of a modified doctor blade system and hot power press. The sheets were used to manufacture specimens with fibre volume contents ranging from 33% to 61%. Specimens were tested for tensile strength, flexural strength and interlaminar shear strength. Composites manufactured during this study exhibited tensile and flexural strength of up to 517 MPa and 157 MPa, respectively.

Cryptand 합성수지에 위한 금속 이온들의 흡착 (Adsorption of Metal Ions on Cryptand Synthetic Resin)

  • 이치영;김준태
    • 환경위생공학
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    • 제20권4호통권58호
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    • pp.38-44
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    • 2005
  • Cryptand resins were synthesized with 1-aza-15-crown-5 macrocyclic ligand attached to styrene divinylbenzene (DVB) copolymer with crosslink of $1\%,\;2\%,\;5\%\;and\;10\%$ by substitution reaction. The synthesis of these resins was confirmed by content of chlorine, element analysis, and IR-spectrum. The effects of pH, time, dielectric constant of solvent and crosslink on adsorption of uranium$(UO_2^{2+})$ ion were investigated. The uranium ion was showed fast adsorption on the resins above pH 3. The optimum equilibrium time for adsorption of metallic ions was about two hours. The adsorption selectivity determined in ethanol was in increasing order uranium$(UO_2^{2+})$ > zinc$(Zn^{2+})$ > samarium$(Sm^{3+})$ ion. The adsorption was in order of $1\%>2\%>5\%>10\%$ crosslink resin and adsorption of resin decreased in proportion to order of dielectric constant of solvents.

물 소화약제로부터 Cryptand 이온교환수지의 Mg(II), Al(III) 및 Pb(II) 흡착특성 (Adsorption Characteristic of Mg(II), Al(III), Pb(II) Metal Ions on Cryptand Ion Exchange Resin from Water Fire Extinguishing Agent)

  • 김준태;김관천
    • 환경위생공학
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    • 제23권1호
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    • pp.57-65
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    • 2008
  • Resins were synthesized with 1-aza-15-crown-5 macrocyclic ligand attached to styrene(dangerous matter) divinylbenzene(DVB) copolymer with crosslink of 1, 2, 6 and 15% by substitution reaction. The synthesis of these resins was confirmed by content of chlorine, element analysis, and IR-spectrum. The effects of pH, time and crosslink on adsorption of metal ion from water fire extinguishing agent by the synthetic resin adsorbent were investigated. The metal ion was showed fast adsorption on the resins above pH 3. The optimum equilibrium time for adsorption of metallic ions was about two hours. The adsorption selectivity determined in water was in increasing order of $Mg^{2+}>Al^{3+}>Pb^{2+}$. The adsorption was in the order of 1, 2, 6, and 15% crosslink resin.