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PROJECTS PROPOSALS - topics

PROJECTS PROPOSALS - topics. SURFACE GRAFTING OF FLUORINATED/SILOXANE ACRYLATES (SILANES) TO CONFER OLEO/HYDRO REPELLENCY TO TEXTILE SUBSTRATES. Finishing of several textile substrates, both natural (cotton, silk, wool…) and synthetic (polyester or polyamide) by: PHOTO-INDUCED PROCESS

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PROJECTS PROPOSALS - topics

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  1. PROJECTS PROPOSALS - topics SURFACE GRAFTING OF FLUORINATED/SILOXANE ACRYLATES (SILANES) TO CONFER OLEO/HYDRO REPELLENCY TO TEXTILE SUBSTRATES • Finishing of several textile substrates, both natural (cotton, silk, wool…) and synthetic (polyester or polyamide) by: • PHOTO-INDUCED PROCESS • The finishing agent is strongly grafted to fibers by means of ultraviolet rays, in presence of a suitable photoinitiator.

  2. References: R. BONGIOVANNI, S. MARCHI, E. ZENO, A. POLLICINO, R.R. THOMAS, Water resistance improvement of filter paper by an uv-grafting modification with a fluoromonomer, Colloids and Surfaces A: Physicochem. Eng. Aspects 2013, 418, 52–59 FERRERO F, PERIOLATTO M, UDRESCU C, Water and oil-repellent coatings of perfluoro-polyacrylate resins on cotton fibers: UV curing in comparison with thermal polymerization, FIBERS AND POLYMERS, 2012, vol.13, No.2, pp. 191-198 R. BONGIOVANNI, E. ZENO, A. POLLICINO, P. SERAFINI, C. TONELLI , UV light-induced grafting of a fluorinated monomer onto cellulose sheets Cellulose 2011, 18(1), 117-126 FERRERO F, PERIOLATTO M, Ultraviolet curing for surface modification of textile fabrics, JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2011, Vol. 11, 8663-8669 FERRERO F, PERIOLATTO M, SANGERMANO M, BIANCHETTO SONGIA M, Water-repellent finishing of cotton fabrics by ultraviolet curing, JOURNAL OF APPLIED POLYMER SCIENCE, 2008, Vol. 107, pp. 810-818,

  3. PLASMA PROCESS • Plasma replaces UV light to provide the required grafting energy. References: F. FERRERO, R. BONGIOVANNI,Improving the surface properties of cellophane by air plasma treatment, Surface & Coatings Technology  2006 (16-17), 4770-4776 MONTARSOLO A, PERIOLATTO M, ZERBOLA M, MOSSOTTI R, FERRERO F, Hydrophobic sol-gel finishing for textiles: Improvement by plasma pre-treatment, TEXTILE RESEARCH JOURNAL, 2013, vol. 83 n.11, pp. 1190-1200

  4. SOL-GEL • The finishing agent is grafted on the fibers surface in form of thin film or nanoparticles, not affecting the comfort properties typical of a textile substrate References: FERRERO F, PERIOLATTO M, Application of fluorinated compounds to cotton fabrics via sol-gel In: APPLIED SURFACE SCIENCE, 2013, vol. 275, pp. 201-207 PERIOLATTO M, FERRERO F, MONTARSOLO A, MOSSOTTI R, Hydrorepellent finishing of cotton fabrics by chemically modified TEOS based nanosol, CELLULOSE, 2013, vol. 20, n.1, pp. 355-364

  5. FILTERING MATERIALS FOR WATER TREATMENTS • Production of new filtering substrates for removal of pollutants from water. • Textile substrates or other suitable filtering materials will be functionalized to confer the desired properties, by means of: • UV-grafting of CHITOSAN coating • UV-grafting of ANTIFOULING additives • Goals: • Removal of dyes (mainly for dyers wastewaters) • Removal of heavy metals • Water disinfection by removal of pathogen microorganisms

  6. References: FERRERO F, PERIOLATTO M, VINEIS C, VARESANO A, Chitosan coated cotton gauze for antibacterial water filtration, CARBOHYDRATE POLYMERS, 2014, vol. 103, pp. 207-212 PERIOLATTO M, FERRERO F, Cotton filter fabrics functionalization by chitosan UV-grafting for removal of dyes, CHEMICAL ENGINEERING TRANSACTIONS, 2013, vol. 32, pp. 85-90 Altered cell wall permeability FERRERO F, PERIOLATTO M, Functionalized fibrous materials for the removal of dyes, CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY, 2012, vol. 14, pp. 487-494 UV lamp Staphilococcus Aureus Photoinitiator Enzyme inhibition FERRERO F, TONETTI C, PERIOLATTO M, Adsorption of heavy metals onto chitosan coated cotton gauze, Carbohydrate polymers, in press Protein and DNA damage UV rays Cell death Chitosan Cell wall damage Chitosan UV grafted on cotton NH2 NH2 NH2 NH2 OH OH OH OH Cotton

  7. PROJECTS PROPOSALS – work to do The research work develops in several steps: Bibliographical research on the “state of the art” of the selected topic Preparation of samples varying the main process parameters, to assess the optimal process conditions (CHEMICAL LAB!!!) Evaluation of the desired properties conferred to the samples (contact angles measurements with oils and water, antibacterial tests, filtering tests carried out both in batch and in continuous assessment) Deep characterization of the samples by means of chemical, morphological, physical and mechanical tests. (e.g. FTIR-ATR, SEM, DSC, TGA, DMTA, but also evaluation of the treatment fastness to laundering, perspiration, rubbing according ASTM) Semi-industrial scale-up (if possible) REQUIRED TIME: NOT LESS THAN 6 MONTHS!!! FROM OCTOBER 2014

  8. If you are interested in one of the presented proposals… Please contact: Prof. BONGIOVANNI Roberta E-mail: roberta.bongiovanni@polito.it Phone: 011 090 4619 Ing. PERIOLATTO Monica E-mail: monica.periolatto@polito.it Phone: 011 090 4630

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