SVIBOR - Project code: 2-14-034


Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69


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Project code: 2-14-034


Main researcher: SOLJAČIĆ, IVO (57132)

Type of research: applied
Duration from: 01/01/91. to 12/31/94.

Papers on project (total): 68
Institution name: Tekstilno tehnološki fakultet, Zagreb (117)
Department/Institute: Department for Textile Chemistry and Material Testing
Address: Savska 16/5
City: 10000 - Zagreb, Croatia
Phone: 385 (0)1 275-767
Phone: 385 (0)1 271-582/9
Fax: 385 (0)1 440-276
Phone: 385 (0)1 444 258

Summary: Kinetics of hidrogen peroxide decomposition, as well as PES fibres alkali hydrolysis, have been investigated, with the aim to assess and improve wool peroxide bleaching process and obtain high quality artificial silk. Heavy metal traces exhibit a catalitic influence on peroxide decomposition and can result in wool demage, while, on the other hand, accelerants in alkali delamination can enhance the effects of processing on PES. Methods of detecting heavy metal traces on wool and cotton have been developed. Spectrophotometric, polarographic, chromatographic and gravimetric measurements have been employed to access and improve textile finishing processes. The investigations indicate that free formaldehyde content in textiles can be reduced by an adequate choice of chemicals and processes. Some processes aimed at enhancing quality have been developed and proposed, specially, in the area of obtaining high oil repellancy, better fabric handle and light shade colourations to washing, as well as in the area of obtaining optimal effects of fabric frontal fixing. Some special methods of finishing and care for textiles and artificial leather have been described and useful instructions for processes improvement given. Changes of sorption and electrokinetic properties cotton fibres and yarn in process mercerization under different conditions of treatment in NaOH solutions is studied.

Keywords: wool, peroxide bleaching, alkali delamination, peroxide decomposition, kinetics and PES alkali hydrolysis, accelerators, heavy metal ions, free formaldehyde, spectrophotometry, polarography, chromatography, crease resist finish, catalysts, oil repellent finish, woven fabric handle, light colourations, shade change, optical brighteners, frontal fixation, care for textiles, colorimetry , colour matching, mercerization, electrokinetic potential, adsorption of surfactant, two-phase titration, streaming current

Research goals: The aim is to optimise some finishing processes by investigation of certain parameters impact on the effects achieved. Special attention will be paid to wool bleaching, PES alkali hydrolisis, some finishing effects, frontal fixing effects, as well as to the influence of optical brightener on the shade of pastel coloured fabrics. The results obtained indicate that the traces of heavy metal ions have deterime an influence on peroxide bleaching effects, so methods for their detection and removal have been proposed.Models of PES alkali delamination have been worked out as well. Fibre fineness variations have been shown to have a significant impact on the handle, strength and oleophobic finishing effects. The content of free formaldehyde on high grade finished textile can be reduced, and even completely eliminated,if necessary, by adequate choice of catalyst, net forming agents,and adequate processing organisation. The change of pastel hue on light coloured samples, which occurs in washing, can be minimised by adding optical brighteners during dyeing. Colour change can occur in frontal fixing too, and the proposed conclusion has been that manufacturer instructions are not necessarily optimal conditions for process ingorganisation. New knowledgements about change of sorption and electrokinetic properties of cotton in mercerization, one of the most important finishing process are studied.


  1. Name of institution: Tekstilni kombinat Zagreb
    Type of institution: Economical/Production
    Type of cooperation: Systematic exchange of information
    City: 10000 - Zagreb, Croatia

  2. Name of institution: Karl Franzens Universitat, Institut fur Physikalische Chemie
    Type of institution: University/Faculty
    Type of cooperation: Joint publishing of scientific papers
    City: Graz, Austrija

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Last update: 10/23/95