• Title/Summary/Keyword: chemical binders

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A Study on Chemical Analysis of Reclaimed Asphalts and Rejuvenators for Property Restoration (성상복원을 위한 폐아스팔트의 화학적 분석 및 재생첨가제 연구)

  • Jung, Du-Hwoe
    • International Journal of Highway Engineering
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    • v.3 no.1 s.7
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    • pp.177-184
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    • 2001
  • A recycling agent has been manufactured on the basis of the chemical composition of reclaimed asphalt binders and virgin asphalt binders. The chemical compositions of reclaimed asphalt binders extracted from reclaimed asphalt pavements have been analyzed according to the ASTM method and the results were compared to those of virgin asphalt binder AP-3. Reclaimed asphalt binders have shown that asphaltenes was increased whereas saturates, naphthene aromatics, and polar aromatics fractions were decreased. A recycling agent made of aromatic compounds, in which its chemical composition is similar to the aromatics fraction in asphalt binders, has been produced to reduce the amount of asphaltenes in reclaimed asphalt hinders. The evaluation of the recycling agent produced was performed by testing ductility, rolling and ball softening point, penetration at $25^{\circ}C$ and viscosity at $60^{\circ}C$. It was found that, by adding the recycling agent 20% by weight to the reclaimed asphalt binders, the physical properties of reclaimed asphalt binders was recovered to the level of virgin asphalt binder AP-3.

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Recent Progress on Polymeric Binders for Silicon Anodes in Lithium-Ion Batteries

  • Choi, Nam-Soon;Ha, Se-Young;Lee, Yongwon;Jang, Jun Yeong;Jeong, Myung-Hwan;Shin, Woo Cheol;Ue, Makoto
    • Journal of Electrochemical Science and Technology
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    • v.6 no.2
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    • pp.35-49
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    • 2015
  • Advanced polymeric binders with unique functions such as improvements in the electronic conduction network, mechanical adhesion, and mechanical durability during cycling have recently gained an increasing amount of attention as a promising means of creating high-performance silicon (Si) anodes in lithium-ion batteries with high energy density levels. In this review, we describe the key challenges of Si anodes, particularly highlighting the recent progress in the area of polymeric binders for Si anodes in cells.

Synthesis of Acrylate Binders for Negative Photoresist (네가티브 포토레지스트용 아크릴레이트계 바인더 합성)

  • Kim, Nan-Soo;Nam, Byeong-Uk
    • Journal of the Semiconductor & Display Technology
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    • v.8 no.3
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    • pp.25-30
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    • 2009
  • In this study, we synthesized novel UV-curable binders and applied for negative photoresist of display device. First, we synthesized UV-curable binders by radical polymerization with a mixture of Styrene/Methyl methacrylate/Methacrylic acid/Glycidyl methacrylate/N-Cyclohexylmaleimide at a fixed composition. Following the first step, we prepared a negative photoresist mixture optimized with photo sensitive initiator and others for the litho test. And then, we studied resolution and film retention with molecular weight of each binders and numerical value of Alkaline Desolution Rate(ADR). As a result of the litho test, we found that if the novel polymers have same numerical value of ADR, the resolution decreased and the film retention increased with the increasing of molecular weight of photoresist binder.

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The Effects of High Pressure and Various Binders on the Physico-chemical Properties of Restructured Pork Meat

  • Hong, Geun-Pyo;Park, Sung-Hee;Kim, Jee-Yeon;Min, Sang-Gi
    • Asian-Australasian Journal of Animal Sciences
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    • v.19 no.10
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    • pp.1484-1489
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    • 2006
  • This study was carried out to investigate the effect of high pressure and the addition of non-meat proteins on the physico-chemical and binding properties of restructured pork. Pressurizations were carried out at up to 200 MPa and non-meat proteins used as a binder were isolated soy protein (ISP), sodium caseinate (SC), whey protein concentrate (WPC) and egg white powder (EWP). The pH values of all treatments were affected by the level of pressure. $L^*$-value of all treatments increased significantly (p<0.05), while both $a^*$-value and $b^*$-value of all treatments showed a significant decrease (p<0.05) with increasing pressure level. Binders could contribute only additive effects on both pH and color of the treatments. It was found that high pressure improved the water binding capacities and binding strength of the treatments. Binders also improved the binding strength of restructured pork. However, SC and WPC had no effect on water binding properties under high pressure. These results indicate that the application of high pressure had more significant effect on restructuring meat than binders.

Cabin Air Filter Media Produced by Needle Punching Process (니들펀치 공정에 의한 캐빈에어필터 여재의 제조)

  • Park, Seungkyu;Kim, Heonchang
    • Applied Chemistry for Engineering
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    • v.20 no.5
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    • pp.561-564
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    • 2009
  • Filter media finely interspersed with activated carbons were prepared by a needle punching process without using chemical binders. Their characteristics were investigated efficiently to abate environmentally harmful gas such as acetaldehyde, and were compared with those of cabin air filter coated with activated carbons by using chemical binders. These combination filters were installed on a vehicle fan placed in a test chamber of capacity similar to the interior volume of a commercially available passenger car, and the efficiency of acetaldehyde abatement was measured as a function of time. The filter utilizing chemical binders showed somewhat better performance for the elimination of acetaldehyde despite the adverse effect of the chemical binder that would clog the micropores of the activated carbons. It turned out that the needle punching process had the activated carbons agglomerated due to hydrophobic interactions, resulting in a relatively larger void area than that of the filter utilizing chemical binders.

Photoelectrochemical Properties of $TiO_2$ Electrodes Prepared Using Chemical Functionalized Binders

  • Song, Yongwhan;Kim, Sangki;Yang, Jaechang;Park, Junho;Kim, Myoungsoo;Gu, Halbon;Park, Kyunghee
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.11a
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    • pp.60.1-60.1
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    • 2010
  • Chemically functionalized plant oils such as acrylated epoxidized soybean oil (AESO) and maleinized acrylated epoxidized soybean oil (MAESO) were used as new bio-based binders for $TiO_2$ electrodes of dye-sensitized solar cells (DSSC). More porous networks and larger porosities were fabricated on the $TiO_2$ films using plant oil binders due to the larger number of functionalities, in comparison with the film using polyethylene glycol (PEG). The charge-transfer resistance in the $TiO_2$ films was considerably shrunk due to the reduced impurity states. The short circuit photocurrent (Isc) and the open circuit photovoltage (Voc) of the cell using plant oil binders increased and the conversion efficiency improved significantly.

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The applicability of Freundlich's isotherm model for the leaching of solidified hazardous waste using cementitious binders

  • Youn Jong Ho;Lee Heon Mo;Jeong Byung Gon;Chung Yong Hyun
    • Environmental Sciences Bulletin of The Korean Environmental Sciences Society
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    • v.2 no.1
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    • pp.9-19
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    • 1998
  • A laboratory study was conducted to investigate the immobilization of the laboratory waste sludge, mainly from chemical oxygen demand (COD) waste, using cementitious binders. The binders were: Ordinary Portland Cement (OPC), and lime-Rice Husk Ash(RHA) cement. The economic evaluation was done for three different kinds of cementitious binders, namely, OPC, Portalnd Rice Husk Ash Cement (PRHAC) which contained rice husk ash 50 percent by dry weight, and lime-RHA cement. The result showed that lime-RHA cement was the cheapest. The applicability of Freundlich's desorption isotherm was studied to assess the teachability of sludges. The teachability of cement mortars was found to follow the desorption isotherms. Therefore, it was concluded that based on this test, the leachate concentrations of the solidified heavy metals could be predicted, approximately by the Freundlich's isotherm desorption modeling.

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The applicability of Freundlichs isotherm model for the leaching of solidified hazardous waste using cementitious binders

  • Jong Ho Youn;Heo
    • Journal of Environmental Science International
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    • v.2 no.1
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    • pp.9.2-19
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    • 1993
  • A laboratory study was conducted to investigate the immobilization of the laboratory waste sludge, mainly from chemical oxygen demand (COD) waste, using cementitious binders. The binders were: Ordinary Portland Cement (OPC), and lime-Rice Husk Ash (RHA) cement. The economic evaluation was done for three different kinds of cementitious binders, namely, OPC, Portaind Rice Husk Ash Cement (PRHAC) which contained rice husk ash U percent by dry weight, and lime-RHA cement. The result showed that lime-RHA cement was the cheapest. The applicability of Freundlich's desorption isotherm was studied to assess the teachability of sludges. The teachability of cement mortars was found to follow the desorption isotherms. Therefore, it was concluded that based on this test, the leachate concentrations of the solidified heavy metals could be predicted, approximately by the Freundlich's isotherm desorption modeling.

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