The Experts below are selected from a list of 39 Experts worldwide ranked by ideXlab platform

Nagaiyan Sekar - One of the best experts on this subject based on the ideXlab platform.

  • uv protective heterocyclic disperse azo dyes spectral properties dyeing potent antibacterial activity on dyed fabric and comparative computational study
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2019
    Co-Authors: Virendra R Mishra, Chaitannya W Ghanavatkar, Nagaiyan Sekar
    Abstract:

    Abstract Disperse azo dyes are synthesized and characterized by 1H NMR, 13C NMR, LC-MS, Elemental analysis, UV–visible, and fluorescence spectroscopy methods. The azo dyes show absorption maxima in the range of 460–493 nm. Dye with benzothiazole moiety i.e. VM7a and VM8a show a bathochromic shift in absorption maxima of 90 and 26 nm respectively in a polar aprotic solvent (i.e. DMF, DMSO). The dyes show deep red emission in a polar aprotic solvent (i.e. DMF, DMSO) with a Stokes shift of 62 to 180 nm. The dyes are applied on polyester fabric and the dyed fabric exhibit excellent to a good wash and sublimation Fastness Property. They show a very good UPF rating and almost blocking 95 to 98% of harmful UV radiation. Antibacterial activity of dyed polyester fabric is assessed qualitatively and quantitatively by using AATCC 147 and 100 test method respectively. The dyed fabrics exhibit excellent antibacterial activities against S.aureus (Gram-positive) and K. pneumoniae (Gram-negative). DFT method was used to identify the stable conformer. HOMO-LUMO gap and global reactivity descriptors were calculated using DFT method and correlated with antibacterial activities and light Fastness properties respectively.

Mongkol Sukwattanasinitt - One of the best experts on this subject based on the ideXlab platform.

  • treatment of oxidized cellulose fabric with chitosan and its surface activity towards anionic reactive dyes
    Cellulose, 2008
    Co-Authors: Yupaporn Kitkulnumchai, Anawat Ajavakom, Mongkol Sukwattanasinitt
    Abstract:

    The surface modification of cellulose fabric with chitosan was achieved through an oxidation of the fabric with KIO4 followed by reductive ammination with chitosan. The chitosan content in the fabric determined by Kjeldahl nitrogen analysis technique was 1.69%. The scanning electron micrograph revealed submicron particles of chitosan attached on the fabric surface. Dyeing of the modified fabrics with mono-chloro-triazine and vinyl sulfone anionic reactive dyes, showed vastly improved exhaustion and color yield (K/S) indicating that this method of surface modification is effective for changing surface activity of the fabric. The enhancement of the dye uptake brought about an improved dyeing process in which the dye and salt used could be reduced by half and 14%, respectively. A Significant drop in burst strength upon the oxidation but no discernable adverse color Fastness Property was observed for the chitosan-modified fabric.

Virendra R Mishra - One of the best experts on this subject based on the ideXlab platform.

  • uv protective heterocyclic disperse azo dyes spectral properties dyeing potent antibacterial activity on dyed fabric and comparative computational study
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2019
    Co-Authors: Virendra R Mishra, Chaitannya W Ghanavatkar, Nagaiyan Sekar
    Abstract:

    Abstract Disperse azo dyes are synthesized and characterized by 1H NMR, 13C NMR, LC-MS, Elemental analysis, UV–visible, and fluorescence spectroscopy methods. The azo dyes show absorption maxima in the range of 460–493 nm. Dye with benzothiazole moiety i.e. VM7a and VM8a show a bathochromic shift in absorption maxima of 90 and 26 nm respectively in a polar aprotic solvent (i.e. DMF, DMSO). The dyes show deep red emission in a polar aprotic solvent (i.e. DMF, DMSO) with a Stokes shift of 62 to 180 nm. The dyes are applied on polyester fabric and the dyed fabric exhibit excellent to a good wash and sublimation Fastness Property. They show a very good UPF rating and almost blocking 95 to 98% of harmful UV radiation. Antibacterial activity of dyed polyester fabric is assessed qualitatively and quantitatively by using AATCC 147 and 100 test method respectively. The dyed fabrics exhibit excellent antibacterial activities against S.aureus (Gram-positive) and K. pneumoniae (Gram-negative). DFT method was used to identify the stable conformer. HOMO-LUMO gap and global reactivity descriptors were calculated using DFT method and correlated with antibacterial activities and light Fastness properties respectively.

Xin-yue Xiao - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Cationic UV Absorber on Light Fastness Property of Reactive
    2016
    Co-Authors: Zahid Latif, Fan Liu, Shu Wen, Shao Long, Xin-yue Xiao
    Abstract:

    Abstract. This article focuses on the improvement in light Fastness of reactive dyed fabric. Cotton fabric was dyed with Liyuan Yellow F S reactive dye and cationic UV absorber CANFIX SUN was subsequently applied by exhaust method in order to improve light Fastness Property. The light Fastness Property of the dyed samples before and after the treatment using UV absorber was tested as per international standards. The results show that for all light, medium and dark shades the dye exhaustion and fixation percentages were very good. In light Fastness Property, the dE value (change in colour) of the dyed sample after treatment is smaller in contrasting to that one before treatment which the tone changed to blue and bright direction. It states that this UV absorber improved the light Fastness of dyed fabrics

  • Effect of Cationic UV Absorber on Light Fastness Property of Reactive Dye
    Proceedings of the 2015 International Conference on Material Science and Applications, 2015
    Co-Authors: Zahid Latif, Fan Liu, Lina Lin, Shu Wen, Shao Long, Xin-yue Xiao, Ying Jie Cai
    Abstract:

    This article focuses on the improvement in light Fastness of reactive dyed fabric. Cotton fabric was dyed with Liyuan Yellow F S reactive dye and cationic UV absorber CANFIX SUN was subsequently applied by exhaust method in order to improve light Fastness Property. The light fa stness Property of the dyed samples before and after the treatment using UV absorber was tested as per international standards. The results show that for all light, medium and dark shades the dye exhaustion and fixation percentages were very good. In light Fastness Property, the dE value (change in colour) of the dyed sample after treatment is smaller in contrasting to that one before treatment which the tone changed to blue and bright direction. It states that this UV absorber im proved the light Fastness of dyed fabrics.

Zahid Latif - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Cationic UV Absorber on Light Fastness Property of Reactive
    2016
    Co-Authors: Zahid Latif, Fan Liu, Shu Wen, Shao Long, Xin-yue Xiao
    Abstract:

    Abstract. This article focuses on the improvement in light Fastness of reactive dyed fabric. Cotton fabric was dyed with Liyuan Yellow F S reactive dye and cationic UV absorber CANFIX SUN was subsequently applied by exhaust method in order to improve light Fastness Property. The light Fastness Property of the dyed samples before and after the treatment using UV absorber was tested as per international standards. The results show that for all light, medium and dark shades the dye exhaustion and fixation percentages were very good. In light Fastness Property, the dE value (change in colour) of the dyed sample after treatment is smaller in contrasting to that one before treatment which the tone changed to blue and bright direction. It states that this UV absorber improved the light Fastness of dyed fabrics

  • Effect of Cationic UV Absorber on Light Fastness Property of Reactive Dye
    Proceedings of the 2015 International Conference on Material Science and Applications, 2015
    Co-Authors: Zahid Latif, Fan Liu, Lina Lin, Shu Wen, Shao Long, Xin-yue Xiao, Ying Jie Cai
    Abstract:

    This article focuses on the improvement in light Fastness of reactive dyed fabric. Cotton fabric was dyed with Liyuan Yellow F S reactive dye and cationic UV absorber CANFIX SUN was subsequently applied by exhaust method in order to improve light Fastness Property. The light fa stness Property of the dyed samples before and after the treatment using UV absorber was tested as per international standards. The results show that for all light, medium and dark shades the dye exhaustion and fixation percentages were very good. In light Fastness Property, the dE value (change in colour) of the dyed sample after treatment is smaller in contrasting to that one before treatment which the tone changed to blue and bright direction. It states that this UV absorber im proved the light Fastness of dyed fabrics.