The treatment of chromium tanned sheepskins with poly(hydroxyl urethane) and dispersion of chemically synthesized nanosilver showed the best resistance to fungi and bacterial exposure tests. These collagen-based materials containing different amounts of nanosilver were investigated by Atomic Absorption Spectroscopy, Atomic Force Microscopy and Scanning Electron Microscopy coupled with Energy Dispersive X-Ray Spectroscopy. The influence of sheepskins treated with silver nanoparticles on the wound healing process was assessed and the nanoparticles concentration seems to have a positive effect up to 370 ppm and does not influence the inflammatory process above this concentration.
Sharma Sanjay K. John Wiley & Sons 2015 Hardcover, 496 pp. Print ISBN: 978-1-118-72099-8 Dyes are used in large quantities in various industries including textiles, healthcare, paint, printing, leatherprocessing and food processing, etc. to colour their products. Only a small fraction (10–20%) of a dye is actually used in the process and rest of the dye ends up in wastewater generated by dye-using industries. Disposal of dye laden wastewater imparts colour to the receiving water bodies. Colour impedes light penetration, photosynthetic activity, inhibits the
hydrolysates, products of partial hydrolysis of proteins which contain the essential amino acids, trace elements, etc. Out of 1000 kg of raw hide, nearly 850 kg is generated as solid waste in leatherprocessing. Only 150 kg of the raw material is converted into leather. Tanneries generate huge amounts of solid waste such as : fleshing, 50–60; chrome shaving, chrome splits and buffing dust, 35–40; skin trimmings, 5–7; and hair, 2–5 %. Solid wastes in the leatherprocessing constitute: beam house, 80; tanning, 19; finishing, 1 %. Collagen hydrolysates display properties
.94 kg/mm2, and the hardness is decreased from 25.10 kg to 22.40 kg.
L K. BELAYA
After artificial aging, the strength is slightly reduced but is still greater
than the strength of the control samples. The hardness is decreased to
Besides processing with the methylol polyamide glue PFE-2/10, we
tested the effect of a 15% solution of poly vinyl alcohol on the leather.
Processing with poly vinyl alcohol increases the strength of leather; how-
ever, its hardness is increased.
Table 3 gives data on the effect of a 15 % solution of poly vinyl alcohol
200 hours of
i. e. 100 hours
on the flesh side
and 100 hours
on the grain side
50 hours of
on the flesh side
and 50 hours
on the grain side
10 hours of
Adbesives for the Restoration of Skin-bindings and Parchments
TABLE 3: Physico-mechanical properties of old tanned leatherprocessed
Name of the process
). If for medical applications collagen and keratin extracts are obtained from primary sources with very rigorous traceability, for the industrial domain secondary resources can also be accessed. Secondary protein resources generated by the leatherprocessing industry and the agro-food industry are an accessible and low cost but less exploited raw material. In the present research, proteins, collagen and keratin were extracted from the leatherprocessing by-products which were used to obtain biocomposites with properties specific to application in the agricultural
). Thermophysiological comfort properties of the leathersprocessed with different tanning agents. Journal of Textile and Apparel/Tekstil ve Konfeksiyon, 26(4), 436–443. Çolak S. M. 2016 Thermophysiological comfort properties of the leathersprocessed with different tanning agents Journal of Textile and Apparel/Tekstil ve Konfeksiyon 26 4 436 443  Nelson, E. A., Hillman, A., Thomas, K. (2014). Intermittent pneumatic compression for treating venous leg ulcers. Cochrane Database of Systematic Reviews, (5). Art. No.: CD001899. DOI: 10.1002/14651858.CD001899.pub4 . Nelson E. A