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Rendering of Cellulose a.eta.e Fa.rics Self-Clea.ing through Trea.ment with TiO<sub>2</sub>Na.o Pa.ticles

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Ma.eria.s Sciences a.d a.plica.ions 2012年第12期3卷 872-879页

作者： M. a. Ra.a.a. W. M. Ra.la. E. M. El-Kha.ib a. hebeish Na.iona. Resea.ch Centre Textile Research Division Cairo Egypt

Finishing using TiO2-na.osol trea.ment of cellulose a.eta.e (Ca. fa.rics before a.d a.ter the la.ter were pretrea.ed with H2O2wa. underta.en with a.view to impa.t unique properties to Ca.fa.rics, nota.ly, self-clea.ing. Finishing wa. performed a. per the pa.-dry-cure method. The finishing trea.ment involved dispersing the na.o-sized TiO2pa.ticles in a.mixture of wa.er a.d ethylene glycol (1:1) a.d a.plica.ion of the dispersions to Ca.fa.rics wa. ma.e under a.va.iety of conditions. Self clea.ing a.ility of the fa.rics is fa.ored by 1) increa.ing the concentra.ion of TiO2-na.osol to certa.n limit;2) prolonga.ion of curing time up to 15 second;3) ra.sing the microwa.e power from 80% to 100% but with the certa.nty tha. power of 90% is the most proper. Besides, exposure time-to UV ra.ia.ion-up to 90 minutes is essentia. to ha.e rema.ka.le self clea.ing properties while keeping other technica. properties, na.ely, strength, roughness a.d wetta.ility pra.tica.ly una.tered. Incorpora.ion of binder in the finishing pa.-ba.h helps sta.ilizing the deposition of TiO2 with excellent self-clea.ing. Pretrea.ment of Ca.fa.rics with H2O2 is a.pre requisite to gua.a.tee excellent self-clea.ing a.ility. Thermofixa.ion a.d microwa.e fixa.ion produces fa.rics with very compa.a.le technica. properties.

关键词： Self-Clea.ing Cellulose a.eta.e Microwa.e Thermofixa.ion Tio2-Na.o Pa.ticles

UV/O<sub>3</sub>Preirra.ia.ed Cotton Fa.ric-Conta.ning Chitosa. for Effective Remova. of Hea.y Meta.s

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Ma.eria.s Sciences a.d a.plica.ions 2014年第10期5卷 698-707页

作者： a. hebeish Kh. Elna.a. M. H. Hela. M. S. Ra.a. M. F. Sha.ba. Chemistry Depa.tment Faculty of Science Helwan University Cairo Egypt Textile Metrology La.ora.ory National Institute for Standards (NIS) Giza Egypt Textile Resea.ch Division National Research Centre (NRC) Giza Egypt

The present work a.ms a. studying the effect of Ultra.Violet/Ozone (UV/O3) irra.ia.ion of cotton fa.rics on their intera.tion with chitosa./citric a.id ba.ed formula.ion a.d, the onset of this on the a.ility of trea.ed fa.rics to remove hea.y meta. ions from their a.ueous solutions. To a.hieve the goa., the cotton fa.rics were preirra.ia.ed for 90 minutes using UV/O3 a. ra.ia.ion source. The irra.ia.ed a.d the unirrda.ia.ed cotton fa.rics were submitted to finishing formula.ion consisting essentia.ly of chitosa. a. a.finishing a.ent a.d citric a.id a. crosslinking a.ent in combina.ion with sodium hypophosphite (SHP) a. a.ca.a.yst. Finishing formula.ion conta.ning different concentra.ions of chitosa. (0 - 4) a.ong with citric a.id (8 g/l) a.d SHP (4 g/l) were used a.d the intera.tion of chitosa. with the cotton fa.ric wa. a.sessed through nitrogen mea.urement. The preirra.ia.ed a.d chemica.ly finished fa.rics vis-à-vis the unirrda.ia.ed fa.rics were exa.ined for meta. ion remova.. Results conclude tha. the preirra.ia.ed cotton fa.rics exhibit higher nitrogen content tha. the unirrda.ia.ed fa.rics. The sa.e holds true for hea.y meta. remova., exemplified by Zn2+ a.d Cd2+ ions from their a.ueous solutions. Tha. is, preirra.ia.ed fa.rics conta.ning chitosa. displa. higher percent hea.y meta. remova. tha. their unirrda.ia.ed ma.es.

关键词： Chitosa. Cotton Irra.ia.ion Preirra.ia.ion Hea.y Meta. Remova.

Prepa.a.ion a.d Cha.a.teriza.ion of Conductive Cellulosic Fa.ric by Polymeriza.ion of Pyrrole

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Ma.eria.s Sciences a.d a.plica.ions 2013年第10期4卷 649-655页

作者： Ja.up Wiener Moha.ed a. Ra.a.a. Reha. Goma. Reha. a.ba.si a.i hebeish Depa.tment of Textile Chemistry Technical University Liberec Czech Republic Depa.tment of Textile Chemistry Technical University Liberec Czech Republic Textile Resea.ch Division National Research Center Dokki Egypt Depa.tment of Textile Ma.eria.s Technical University Liberec Czech Republic Specific Educa.ion Fa.ulty Zagazig University Sharkeya Egypt Textile Resea.ch Division National Research Center Dokki Egypt

Prepa.a.ion of conductive cotton fa.rics, by polymeriza.ion of pyrrole in presence of FeCl3 a. a. oxidizing a.ent a.d tetra.thyla.monium p-toluene sulfona. (TEa.-TS) a. a.doping a.ent which in turn ca.sed a.reduction in the moisture rega.n of the substra.e, resulted in production conductive cotton fa.rics in la.ora.ory sca.e. Fa.tors a.fecting the properties of the fa.rics were studied, such a. ra.io between FeCl3 a.d TEa.-TS a.d pyrrole concentra.ion. Polypyrrole coa.ed cotton fa.rics were cha.a.terized by sca.ning electron microscopy (SEM) a.d Fourier tra.sform-infra.ed (FT-IR) spectroscopy. Resistivity, weight ga.n, color strength, tensile strength a.d elonga.ion of the coa.ed fa.ric with polypyrrol were monitored a.cording to a.TM procedures. The results ha. shown tha., the conductivity, weight ga.n, color strength, tensile strength a.d elonga.ion increa.e by increa.ing FeCl3, TEa.-TS a.d pyrrole concentra.ion. This is due to the increa.e of a.ount of the conductive polymer on the fa.ric surfa.e. FeCl3 (0.25 M/L), TEa.-TS (0.125 M/L), pyrrole (0.3 M/L), tempera.ure (25°C) a.d time (4 h) represented the most a.propria.e formula.ion for effecting polymerizing of pyrrole a.d a.choring on cotton fa.rics.

关键词： Polymeriza.ion Polymer Pyrrole Conductivity Cellulose

New Route for Novel Polyca.boxylic Sta.ch Hybrid

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