• The monthly packaging world
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• s.351
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• pp.54-59
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• 2022

• Applied Chemistry for Engineering
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• v.22 no.6
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• pp.587-593
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• 2011

As a result of increasing environmental concerns related to air quality and maintenance of automobiles, the alkylation of isobutane with olefins has become an even more important process for production of high quality gasoline. However, the widespread use of the alkylation process is limited by the polluting and corrosive liquid acid catalysts (HF and $H_2SO_4$) currently used in industry. For the reason, a large number of solid catalysts, especially zeolites, have been studied as an environmental friendly catalyst in this process. Recently, mesoporous solid acids and ionic liquids have been investigated as a green catalyst. In this review, the research of environmental friendly catalysts for an isobutane alkylation is summarized.

• Journal of Environmental Policy
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• v.6 no.1
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• pp.61-81
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• 2007

Types of agricultural policy can be catagorized into two general cases: price and income supports. Income supports are any government program designed to provide farmers with higher incomes than they would receive otherwise. These direct cash payments to farmers are known as "deficiency payment" or "direct payment" because they compensate the farmer for the failure of the market to provide farmers with adequate prices. The direct payment to environment-friendly agriculture is a form of income supports for the agriculture production using less pesticides and chemical fertilizers. Because no significant regulation exists on the use of fertilizers substituting chemical fertilizers for crop, the role of the payment on reducing environmental impacts of agriculture is not entirely clear. This uncertainty is likely to be particularly severe in the case that farmers with low-quality land showing greater demand for fertiliser have an incentive to transition to environment-friendly agriculture. The paper shows the case of the current payment system in Korea.

• Life and Agrochemicals
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• v.27 no.6 s.219
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• pp.18-21
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• 2006

• Journal of Adhesion and Interface
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• v.21 no.4
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• pp.156-161
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• 2020

Waterborne pressure sensitive adhesives (PSA) has been received much attentions from both academia and industries as an environmental friendly-technology because it can significantly reduce use of hazardous organic volatile solvents. However, in the process of the mass production of waterborne PSAs, hazardous phenol type amphiphilic compounds have essentially been used as surfactants for the emulsion polymerization. For the reason, tremendous research efforts have been made to develop environment-friendly organic surfactant which can replace the phenol type surfactants. In this study, we verify the potential of a new class of surfactants based on the styrenated phenol derivatives as an alternative to the phenol type surfactants.

• Life and Agrochemicals
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• s.251
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• pp.12-15
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• 2009

우리나라는 병해충 발생이 많고 토양도 너무나 척박하다. 친환경농자재의 효과는 논란의 중심에 서 있다. 특히 화학제품을 이용한 미량원소가 함유될 수 없기 때문에 미량원소 결핍현상도 자주 나타난다. 효과가 중요하지만 친환경농자재에서 효과를 얘기하는 것도 어려움이 많다. 양자를 조화시킨 한국형 과학영농이 논의되어야 할 시점이다.

• Composites Research
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• v.35 no.4
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• pp.232-241
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• 2022

Plasticizers are chemical additives added to polymers to have a desirable effect on mechanical properties such as processability and ductility. In this paper, we explore the use and market of eco-friendly plasticizers that can replace phthalate-based plasticizers that have been traditionally used in the plastics market. Bio plasticizers are derived primarily from biomass sources, including agricultural products, by-products and wastes. Regardless of the source of biomass, an ideal eco-friendly plasticizer should be non-toxic, have high resistance to volatilization, extraction, and migration, have good compatibility and compatibility, and be economical. The global bio plasticizer market is expected to reach USD 2.1 billion by 2030 from USD 1.3 billion in 2020, growing at a CAGR of 5.31% from 2021 to 2030.

• Prospectives of Industrial Chemistry
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• v.24 no.2
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• pp.31-37
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• 2021

일반적으로 cross-link된 열경화성 에폭시수지는 유기용매에 용해되지 않고 열에 용융되지 않는 특성이 있다. 따라서 에폭시수지가 사용된 물질, 특히 탄소섬유강화플라스틱(carbon fiber reinforced plastic, CFRP)은 재활용이 어렵고, 사용 후 폐기물 처리에 막대한 비용이 소비되고 있다. 본 원고는 열경화성 에폭시수지 응용물 중 CFRP의 재활용을 중심으로 한 친환경적 재활용 기술에 관하여 정리하였다. 특히, CFRP의 구성요소인 탄소섬유(CF)와 기지재인 에폭시수지를 모두 재활용 할 수 있는 화학적 방법에 관하여 보고한다. 더 나아가 열경화성 에폭시수지의 화학적 분해물의 재이용기술에 관한 예를 소개한다.

• The Journal of Engineering Geology
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• v.22 no.4
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• pp.439-448
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• 2012

The aim of this study is to develop eco-friendly, fundamental technology for vegetative restoration of barren lands using green rehabilitation material, for the stabilization of abandoned mine debris slopes and depository slopes composed of rock fragments. It is expected that such methods would help to improve the negative view of artificial slopes that remain following mining activity, while also contributing to slope stabilization and prevention of the loss of rock fragments and the dispersion of tailings. We tested the tensile strength and tear strength of various materials, including commonly used natural coir material, natural fibers, and synthetic textile materials with enhanced durability. In conclusion, there is the possibility that natural coir can be used as an eco-friendly material in vegetation restoration, while its durability in natural conditions can be improved by controlling the degree of knot convolution and by antibacterial treatment against biodegradation.

• Korean Journal of Organic Agriculture
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• v.25 no.3
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• pp.631-642
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• 2017

For effective control of insect pest which can outbreak in a field during crop cultivation, various control agents such as eco-friendly agricultural materials (EFAM) including microbial control agents and chemical pesticides have been applied at fields and these control agents may be treated simultaneous or sequential in the same field to suppress diverse pests and diseases. The agents may influence each other and control efficacy may also differ from interactions. Therefore we need to test compatibility of microbial control agents with other agricultural agents. In this study, we investigated influence of pre-treated EFAMs, which are registered for whitefly control in greenhouse, on germination, mycelial growth and control efficacy of Isaria javanica isolate against sweet potato whitefly. The results showed that a mixture of paraffin oil+cinnamon oil among 4 EFAMs highly reduced germination ($8.9{\pm}1.3%{\sim}24.5{\pm}0.9%$) and mycelial growth ($0.81{\pm}0.01cm{\sim}0cm$) of I. javanica. To investigate the effects of the treatment interval between EFAMs and I. javanica on sweet potato whitefly control, four different EFAMs were pre-treated 0, 1, 4, and 7 days before applying I. javanica. Pre-treatment of four EFAMs inhibited insecticidal activity of I. javanica against sweet potato whitefly. Therefore when EFAMs and a mycopesticide using I. javanica spray simultaneous or sequential, application of EFAMs need more than 7 days interval after treatment of mycopesticide at field.