The Experts below are selected from a list of 159 Experts worldwide ranked by ideXlab platform

Molla Tadesse Abate - One of the best experts on this subject based on the ideXlab platform.

Cintia Marangoni - One of the best experts on this subject based on the ideXlab platform.

  • Intensification of water reclamation from textile Dyeing wastewater using thermal membrane technologies – Performance comparison of vacuum membrane distillation and thermopervaporation
    Chemical Engineering and Processing - Process Intensification, 2019
    Co-Authors: Heloisa Ramlow, Victor Hugo Mondini Correa, Ricardo Antonio Francisco Machado, Andrea Cristiane Krause Bierhalz, Cintia Marangoni
    Abstract:

    Abstract Vacuum membrane distillation (VMD) and themopervaporation (TPV) were compared as intensification processes for water reclamation from textile Dyeing wastewater. The results showed the potential of each technique: VMD increased the permeate flux while TPV resulted in complete dye rejection for both tested dye classes. In VMD, the dye rejection of Disperse Dyeing wastewater resulted in 97.5%. In this case, TPV using a dense membrane should be considered for high-quality water reclamation. However, the VMD using a porous membrane may show higher pure water reclamation with wastewater resulted from reactive Dyeing. Both processes recovered water from dye solution, but the separation mechanisms are totally different: based on a difference in volatility in VMD by using a porous membrane and based on a difference in membrane affinity in TPV by using a dense membrane. The obtained results suggest that VMD and TPV may be integrated into the same operating system next to the Dyeing machine. This flexibility in the textile industry may overcome difficult points in the individual processes according to the dye class by simply changing the membrane. The application of both processes is interesting since a heat recovery from Dyeing wastewater is possible, and no additives are required.

Yongjin Lim - One of the best experts on this subject based on the ideXlab platform.

  • thermodynamic parameters of Disperse Dyeing on several polyester fibers having different molecular structures
    Dyes and Pigments, 2005
    Co-Authors: Taekyung Kim, Younga Son, Yongjin Lim
    Abstract:

    Abstract Dyeing properties of the easy dyeable polyester (EDP) and the polytrimethylene terephthalate (PTT) were investigated in terms of their thermodynamic and kinetic factors, such as standard affinity (−Δμ0), enthalpy change (ΔH0), entropy change (ΔS0), diffusion coefficient (DT) and activation energy of the diffusion (ED). The results were compared with corresponding properties of the PET (polyethylene terephthalate). The −Δμ0 of the EDP and the PTT showed a little higher value than that of the PET. PET displayed the highest negative values of the ΔH0 and the ΔS0, while PTT showed the lowest negative values of them. For all three polyester types, as the temperature increased, the DT increased. PTT had the highest DT at every temperature and PET showed the lowest values of the DT. The ED of the EDP and the PTT was lower than that of the PET.

Chen Shui-lin - One of the best experts on this subject based on the ideXlab platform.

  • Polyester Dyeing using microencapsulated Disperse dyes
    2009
    Co-Authors: Chen Shui-lin
    Abstract:

    Process conditions affecting Dyeing results during microencapsulated Disperse Dyeing were analyzed,and reuse of the Dyeing effluents was investigated.Results showed that,release rate of microencapsulated Disperse dyes was related to temperature,and the optimum Dyeing temperature was 130 ℃;particle size of microencapsulated Disperse dyes had great influence on release property of Disperse dyes,adding diffusing agent could improve release property of Disperse dyes;polyester dyed with microencapsulated Disperse dyes without auxiliary and rinsing could obtain similar Dyeing effect to that of traditional Disperse Dyeing;the chroma,COD and BOD value of Dyeing residual liquid were much lower than those of traditional Disperse Dyeing and could be reused in Dyeing,pretreatment and finishing.

  • Dyeing with microencapsulated Disperse dyes
    2008
    Co-Authors: Chen Shui-lin
    Abstract:

    Microencapsulated Disperse dye is a kind of novel dyestuff with unique nature, such as resistance to high temperature and mechanical strength, and separate and controlled-release properties. The conventional Dyeing equipment was applied to microencapsulated Disperse Dyeing without chemical auxiliary. Meanwhile, its non-pollution Dyeing process without washing after Dyeing was realized. The process was suitable for Dyeing woven fabric, knitted fabric and yarn of synthetic fiber.

  • Microencapsulated Disperse Dyeing of suede-like fabric without auxiliary
    2006
    Co-Authors: Chen Shui-lin
    Abstract:

    Microencapsulated Disperse dyes of S, SE and E types with double layered wall were prepared by in-situ polymerization. The microencapsulated Disperse dyes were used to dye suede-like fabric under high temperature high pressure without auxiliaries, and compared with traditional Disperse Dyeing. The results showed that the microencapsulated Disperse dyes featured better color fastness to sunlight. The absorbance of Dyeing wastewater is 1/50 of that of conventional Disperse dye. The rubbing fastness, color change fastness and staining fastness are equal to that of traditional Disperse dye.

Vincent Nierstrasz - One of the best experts on this subject based on the ideXlab platform.