Fabrication of composite from dechromed leather shavings for insole

Md Abul Hashem, Md Shahruk Nur-A-Tomal, Nusrat Sharmin

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The processing of conversion of putrescible hide/skin into imputrescible leather generates huge amount of solid waste. One of the potential solid wastes generated from leather industry is chrome shavings, and its disposal is increasingly becoming a huge challenge on disposal to tanners due to presence of chromium. The present study aims to develop sustainable technology for management and valorization of chrome shavings by the process of dechroming and preparing composite from the dechromed fibre. Investigations were carried out to remove chromium from chrome shavings by treating with organic acids. Oxalic acid yields best dechroming among diammonium oxalate, oxalic acid, and citric acid. Then delimed shavings was incorporated with various chemicals to obtain define properties and finally coagulant was used for sheet forming. The mixture was then poured on nylon net into aluminum sieve. The fabricated composite sheet was dried and pressed. The fabricated composite sheets were inspected and characterized for their physical properties. The chromium removal efficiency from shavings was obtained 85%. The tensile strength and elongation at break of the finished composite were 222.7 ± 2.5 kg/cm2, 24.2 ± 0.15%, respectively. The results indicate that the fabricated composite could be used in the footwear and leather products industry. The present approach has dual benefits for the tanner: i) it allows the production of new valuable product for the commercial use and ii) it could reduce the environmental impact from the tannery.

Original languageEnglish
Title of host publicationProceedings of the 34th IULTCS Congress
Subtitle of host publicationScience and Technology for Sustainability of Leather
PublisherCSIR-CLRI
Pages38-45
Number of pages8
ISBN (Electronic)9788193263907
Publication statusPublished - 2017
Externally publishedYes
EventInternational Union of Leather Technologists and Chemists Congress 2017 - Chennai, India
Duration: 5 Feb 20178 Feb 2017
Conference number: 34th

Conference

ConferenceInternational Union of Leather Technologists and Chemists Congress 2017
Abbreviated titleIULTCS Congress 2017
Country/TerritoryIndia
CityChennai
Period5/02/178/02/17

Keywords

  • Chromium
  • Composite
  • Dechroming
  • Insole
  • Leather shavings
  • Organic acid

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