WAXS studies on silk fibres treated with acid (blue) and metal complex (brown) dyes

Somashekarappa, H.; Nadiger, G. S.; Somashekar, T. H.; Prabhu, J.; Somashekar, R.K.

doi:10.1016/s0032-3861(97)00220-6

Cited by 12 publications

(7 citation statements)

References 17 publications

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“…A consolidated and well‐documented literature is not available that specifically relates to dye–silk interaction and morphological structure. Somashekharappa et al4 studied the changes in crystal size of mulberry (bivoltine and multivoltine) silk fibers after dyeing with acid and metal‐complex dyes using WAXD studies. The crystal size values were found to decrease from 29.7 to 20.3 Å for acid‐dyed fibers and from 29.7 to 21.5 Å for metal‐complex–dyed bivoltine silk fibers.…”

Section: Introductionmentioning

confidence: 99%

Studies on Indian silk. III. Effect of structure on dyeing behavior

Sen

K²

2004

J of Applied Polymer Sci

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This third in a series of articles deals with the analysis of the dyeing behavior of two mulberry and three nonmulberry varieties of silk. The results of the dyeing tests carried out were discussed in relation to the physical and chemical structure of the silk fibers. Noticeable differences in the dye uptake were observed among the different varieties of silk. Mulberry varieties showed higher dye uptake compared to that of all three nonmulberry varieties. Among the nonmulberry varieties, tasar shows higher dye uptake followed by eri and muga. Interestingly, dye uptake reduces significantly within a variety from the outer to the inner layers. The reduction within a variety was found to correlate well with the morphological parameters. Determination of morphology of fibers confirmed significant differences in structural parameters such as crystallinity, orientation, density, and birefringence, for example, between and within varieties. An increase in all these parameters was observed as one moves from the outer to the inner layers within a variety. The differences in the dye uptake of different varieties of silk correlated well with the physical as well as chemical structure of silk fibers. Dye uptake differences between the varieties were found to correlate with the end amino groups.

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Section: Introductionmentioning

confidence: 99%

Studies on Indian silk. III. Effect of structure on dyeing behavior

Sen

K²

2004

J of Applied Polymer Sci

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“…Okuyama et al (1988) reported crystal structure for silk-I and silk-II fibres. Somashekarappa et al (1998) reported the effect of degumming and dye processing on the microstructural parameters in pure Mysore silk, Nistari, NB7 and NB18 silk fibres. Sangappa et al (2004Sangappa et al ( , 2005bSangappa et al ( , 2010 reported microstructural parameters in Hosa Mysore (HM), Pure Mysore Silk (PMS), Nistari, C-nichi and changes of microstructural parameters in electron-irradiated NB7 silk fibres.…”

Section: Introductionmentioning

confidence: 99%

Changes in microstructural parameters of NB4D2 silk fibres due to electron irradiation: X-ray line profile analysis

et al. 2011

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The present study is concerned with changes of microcrystalline parameters in NB4D2 (Bombyx mori) silk fibres, due to electron irradiation. The irradiation process was performed in air at room temperature using 8 MeV electron beam at different dose rates: 0, 25, 50 and 75 kGy, respectively. X-ray recording of these irradiated samples and the line profile analysis were carried out. The crystal imperfection parameters such as crystallite size 〈N〉, lattice strain (g in %) and surface weighted crystallite size (D s) were computed and compared with other physical parameters in order to asertain the changes that have crept into these irradiated fibres. Exponential, lognormal and Reinhold functions for the column length distributions have been used for the determination of these parameters.

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“…At the microscopic level, the polymer genetic or other kinds of modification can be brought degradation is characterized by macromolecular chain about using energetic electron irradiation. Somashekarappa et al (1998) radiation chemistry, polymers are classified into two have reported the effect of degumming and dye types: scission polymers and cross-linking polymers. These affects due to electron irradiation as these parameters determine the macroscopic properties like mechanical strength, the property and strength of the fibers.…”

Section: Introductionmentioning

confidence: 99%

MICROSTRUCTURAL PARAMETERS IN 8 MeV ELECTRON‐IRRADIATED BOMBYX MORI SILK FIBERS BY Wide‐ANGLE X‐RAY SCATTERING STUDIES (WAXS)

Sangappa¹,

Asha²,

Sanjeev³

et al. 2010

AIP Conference Proceedings

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Articles you may be interested inEffects of different colorants on morphological development of sheared isotactic polypropylene: A study using synchrotron wide-angle x-ray scattering ABSTRACTThe present work looks into the microstructural modification in electron irradiated Bombyx mori P31 silk fibers. The irradiation process was performed in air at room temperature using 8 MeV electron accelerator at different doses: 0, 25, 50 and 100 kGy. Irradiation of polymer is used to cross-link or degrade the desired component or to fix the polymer morphology. The changes in microstructural parameters in these natural polymer fibers have been computed using wide angle X-ray scattering (WAXS) data and employing line profile analysis (LPA) using Fourier transform technique of Warren. Exponential, Lognormal and Reinhold functions for the column length distributions have been used for the determination of crystal size, lattice strain and enthalpy parameters.

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WAXS studies on silk fibres treated with acid (blue) and metal complex (brown) dyes

Cited by 12 publications

References 17 publications

Studies on Indian silk. III. Effect of structure on dyeing behavior

Studies on Indian silk. III. Effect of structure on dyeing behavior

Changes in microstructural parameters of NB4D2 silk fibres due to electron irradiation: X-ray line profile analysis

MICROSTRUCTURAL PARAMETERS IN 8 MeV ELECTRON‐IRRADIATED BOMBYX MORI SILK FIBERS BY Wide‐ANGLE X‐RAY SCATTERING STUDIES (WAXS)

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