Sustainable Functionalization of PAN to Improve Tinctorial Capacity

This study may open a new way to obtain the coloration of a polymer during functionalization. Two polyacrylonitrile (PAN) polymers in the form of textile fibers (<i>Melana</i> and <i>Dralon L</i>) were subjected to functionalization treatments in order to improve the dyeing c...

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Autores principales:	Vasilica Popescu, Ingrid Ioana Buciscanu, Melinda Pruneanu, Stelian Sergiu Maier, Angela Danila, Vasilica Maier, Marius Pîslaru, Vlad Rotaru, Irina Niculina Cristian, Andrei Popescu, Bogdan Istrate, Alexandra Cristina Blaga, Florin Ciolacu, Igor Cretescu, Petronela Chelariu, Marina Marin
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	functionalization polyacrilonitrile iodinehydrin iodine-oxime nitrile oxides coloring Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/c783adca5de14c73bafa4e9e718eeb9e
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spelling	oai:doaj.org-article:c783adca5de14c73bafa4e9e718eeb9e2021-11-11T18:43:08ZSustainable Functionalization of PAN to Improve Tinctorial Capacity10.3390/polym132136652073-4360https://doaj.org/article/c783adca5de14c73bafa4e9e718eeb9e2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3665https://doaj.org/toc/2073-4360This study may open a new way to obtain the coloration of a polymer during functionalization. Two polyacrylonitrile (PAN) polymers in the form of textile fibers (<i>Melana</i> and <i>Dralon L</i>) were subjected to functionalization treatments in order to improve the dyeing capacity. The functionalizations determined by an organo-hypervalent iodine reagent developed in situ led to fiber coloration without using dyes. KIO<sub>3</sub> was formed in situ from the interaction of aqueous solutions of 3–9% KOH with 3–9% I<sub>2</sub>, at 120 °C. The yellow-orange coloration appeared as a result of the transformations in the chemical structure of each functionalized polymer, with the formation of iodinehydrin groups. The degree of functionalization directly influenced the obtained color. The results of the Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), Map and Temogravimetric Analysis (TG) plus Differential Thermal (DTA) analyses indicated the presence of new functional groups, such as iodine-oxime. The X-ray diffraction (XRD) analysis confirmed the change of the crystalline/amorphous ratio in favor of the former. The new groups introduced by functionalization make it possible to dye with classes of dyes specific to these groups, but not specific to PAN fibers, thus improving their dyeing capacity.Vasilica PopescuIngrid Ioana BuciscanuMelinda PruneanuStelian Sergiu MaierAngela DanilaVasilica MaierMarius PîslaruVlad RotaruIrina Niculina CristianAndrei PopescuBogdan IstrateAlexandra Cristina BlagaFlorin CiolacuIgor CretescuPetronela ChelariuMarina MarinMDPI AGarticlefunctionalizationpolyacrilonitrileiodinehydriniodine-oximenitrile oxidescoloringOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3665, p 3665 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	functionalization polyacrilonitrile iodinehydrin iodine-oxime nitrile oxides coloring Organic chemistry QD241-441
spellingShingle	functionalization polyacrilonitrile iodinehydrin iodine-oxime nitrile oxides coloring Organic chemistry QD241-441 Vasilica Popescu Ingrid Ioana Buciscanu Melinda Pruneanu Stelian Sergiu Maier Angela Danila Vasilica Maier Marius Pîslaru Vlad Rotaru Irina Niculina Cristian Andrei Popescu Bogdan Istrate Alexandra Cristina Blaga Florin Ciolacu Igor Cretescu Petronela Chelariu Marina Marin Sustainable Functionalization of PAN to Improve Tinctorial Capacity
description	This study may open a new way to obtain the coloration of a polymer during functionalization. Two polyacrylonitrile (PAN) polymers in the form of textile fibers (<i>Melana</i> and <i>Dralon L</i>) were subjected to functionalization treatments in order to improve the dyeing capacity. The functionalizations determined by an organo-hypervalent iodine reagent developed in situ led to fiber coloration without using dyes. KIO<sub>3</sub> was formed in situ from the interaction of aqueous solutions of 3–9% KOH with 3–9% I<sub>2</sub>, at 120 °C. The yellow-orange coloration appeared as a result of the transformations in the chemical structure of each functionalized polymer, with the formation of iodinehydrin groups. The degree of functionalization directly influenced the obtained color. The results of the Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), Map and Temogravimetric Analysis (TG) plus Differential Thermal (DTA) analyses indicated the presence of new functional groups, such as iodine-oxime. The X-ray diffraction (XRD) analysis confirmed the change of the crystalline/amorphous ratio in favor of the former. The new groups introduced by functionalization make it possible to dye with classes of dyes specific to these groups, but not specific to PAN fibers, thus improving their dyeing capacity.
format	article
author	Vasilica Popescu Ingrid Ioana Buciscanu Melinda Pruneanu Stelian Sergiu Maier Angela Danila Vasilica Maier Marius Pîslaru Vlad Rotaru Irina Niculina Cristian Andrei Popescu Bogdan Istrate Alexandra Cristina Blaga Florin Ciolacu Igor Cretescu Petronela Chelariu Marina Marin
author_facet	Vasilica Popescu Ingrid Ioana Buciscanu Melinda Pruneanu Stelian Sergiu Maier Angela Danila Vasilica Maier Marius Pîslaru Vlad Rotaru Irina Niculina Cristian Andrei Popescu Bogdan Istrate Alexandra Cristina Blaga Florin Ciolacu Igor Cretescu Petronela Chelariu Marina Marin
author_sort	Vasilica Popescu
title	Sustainable Functionalization of PAN to Improve Tinctorial Capacity
title_short	Sustainable Functionalization of PAN to Improve Tinctorial Capacity
title_full	Sustainable Functionalization of PAN to Improve Tinctorial Capacity
title_fullStr	Sustainable Functionalization of PAN to Improve Tinctorial Capacity
title_full_unstemmed	Sustainable Functionalization of PAN to Improve Tinctorial Capacity
title_sort	sustainable functionalization of pan to improve tinctorial capacity
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c783adca5de14c73bafa4e9e718eeb9e
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Sustainable Functionalization of PAN to Improve Tinctorial Capacity

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