CIRCOT Research Achievements 2010-2011

The following are some of the achievements made by the Institute in various research programmes and other related areas vis­ a-vis areas of shortfalls to rededicate ourselves to the cause of cotton and other natural fibres for providing maximum benefits to the farmer and other stakeholders in the  value chain.

  • A pneumatic loading mechanism for incorporation in a double roller ginning machine has been developed. As a result, decreased machine vibration and uniform ginning of cotton throughout the roller were  noted. A marked improvement in lint colour and reduction in nep count compared to  those  produced by traditional D.R. gin  were  observed.
  • During the  year  2010-11, 3724  cotton samples received under AICCIP  were  tested for fibre  quality and spinnability tests  for the  promising entries were  also conducted.
  • Sixty trade  and fifty standard varieties received during the reporting period were evaluated for fibre, yarn and spinnability characteristics.
  • Two hundred and  ninety-seven containers of  calibration cotton as standard reference material were  sold  to industry and cotton research institutions.
  • Studies on the liquid management properties of commercially procured cotton and cotton blended fabrics showed that the Moisture management capabilities of fabrics appear to depend on the  thickness of fabrics. The  wetting time has a linear negative correlation with compressibility (R 2 =0.93), and the spreading speed is related to co”mpressibility in a nonlinear way. For fabrics with low compressibility (< 0.3)  the spreading speed reduced with  compressibility. But  once  compressibility  exceeded 0.3,  any  further increase in compressibility helped positively the spreading speed.
  • A prototype apparatus for  measuring the  Moisture Vapour  Transfer Rate  (MVTR)  of fabrics based  on the Dish  method has been fabricated. The evaluation of the new setup is progress.
  • A fluorocarbon based  repelient finish using  TG581along with a crosslinking agent was found  to impart good  pesticide protection to cotton fabrics with adequate washfastness upto  25 wash  cycles  as required for level  2 protection.
  • Attractive shades could  be  obtained with improved colourfastness to  light and  colour strength (k/s), with the  blend of different natural dyes  such  as Manjistha and Turmeric on cotton fabrics.
  • While  using  the  banana pseudo-stem sap as a mordant for  dyeing cotton with  natural dyes, uniform dyeing could be achieved by changing the pH and subsequent application of alum  to make it slightly acidic.
  • Ti02 nanoparticle has  been  synthesised by  a chemical route by  using  titanium tetra­iso-propoxide (TTIP) as a precursor.
  • Soil  bacterial isolates were  screened for  gossypol detoxification  in  mineral medium containing 10 ppm of free gossypol. The isolates BN-16-3, BN-46-2 and BN-23-1showed reduction of free  gossypol up to 86%, 75% and  56% respectively.
  • Based  on  a BPD-CIRCOT  proposal, a  loan  of  680  lakhs  has  been  sanctioned by  the Ministry of  Social  Welfare, Govt. of Maharashtra to M/s.  Tulsai Magasvargiy Audyogik Sahakari Sanstha, Washim  (MS)  to set  up a 10 TPD capacity plant for manufacture of particle board from cotton stalks based  on CIRCOT technology.
  • A Prototype disintegrator, defibering machine and a fibre segregator for use in extraction and segregation of coconut fibre  have  been completed.
  • Three  rubber check dams (impounding structure) have been installed at Odisha – in the experimental fields of (a) Directorate of Water Management (DWM),(b) Mandhasal, Odisha; Baghamari D/W-4 watershed, Odisha  and  (c)  Badaphokaria, Khurda  district, Odisha. CIRCOT helped as a consortium partner by  providing the  technical details  about the composite anchoring during the installation of the dam.
  • Spinning machines suitable for  extraction of banana  fibres  – fibre  softner unit, fibre cutter, carding unit, drawing unit and  ring  frame have  been  fabricated and  installed successfully at CIRCOT.
  • Microcrystalline cellulose powder was also prepared from  banana  fibres and evaluated with commercial grade  MCC. The properties were on par with  the commercial product.
  • Zinc  chloride pretreatment to  microcrystalline cellulose was noted  to help  in reducing the energy consumption by 1/3’d during the homogenization process  for preparation of cellulose  nano-fibrils.