7th IMRMPT

Abstract

Abstract information

English title:	Evaluation of elastomers extracted from tires and surface-modified as potential inhibitors to chemical attack in commercial cements
Spanish title:	Evaluaci�n de elast�meros extra�dos de neum�ticos y modificados superficialmente como potenciales inhibidores a ataques qu�micos en cementos comerciales
English abstract:	Elastomers are natural or synthetic polymers used in the automotive, mining, molds, assembly and other industries, due to their mechanical resistance in a wide range of temperatures from 60�C to 320�C; however, the waste generated is not adequately disposed of, especially in the manufacture of tires, which generates environmental problems such as inadequate final disposal, generation of toxic gases and public health problems. Therefore, in order to reuse these wastes, in the present research the elastomers were superficially modified to produce a strong adhesion with inorganic compounds such as cement, by means of oxidation and sulfonation processes. For this purpose, NaOH and KMnO4 solutions were prepared at a concentration of 5% and impregnated in saturated NaHSO3 solution. Subsequently, the modified elastomer was characterized morphologically by scanning electron microscopy, thermogravimetrically by differential scanning calorimeter; compositionally by infrared spectroscopy, Raman spectroscopy, X-ray fluorescence, energy dispersive X-ray analysis and hydrophobic tests by contact angle techniques, in order to establish the morphological and chemical compatibility with inorganic compounds. The results evidenced the inclusion of OH, C = O and SO3 functional groups, the reduction of carbon present in weak bonds and the presence of inorganic components such as potassium, sodium, manganese and sulfur. Scanning electron microscopy shows an increase in the roughness and contact surface of the elastomer as a function of the inclusion of polar functional groups by surface chemical treatment. These characteristics generate a greater inclusion and compatibility of elastomers of organic nature in inorganic compounds such as cement�matrices.
Spanish abstract:	Los elast�meros son pol�meros naturales o sint�ticos utilizados en la industria automotriz, minera, moldes, ensamblaje y otras, debido a su resistencia mec�nica en un amplio rango de temperaturas de 60�C a 320�C; sin embargo, los residuos generados no son dispuestos adecuadamente, especialmente en la fabricaci�n de llantas, lo que genera problemas ambientales como disposici�n final inadecuada, generaci�n de gases t�xicos y problemas de salud p�blica. Por lo tanto, con el fin de reutilizar estos residuos, en la presente investigaci�n se modificaron superficialmente los elast�meros para producir una fuerte adhesi�n con compuestos inorg�nicos como el cemento, mediante procesos de oxidaci�n y sulfonaci�n. Para ello, se prepararon soluciones de NaOH y KMnO4 a una concentraci�n del 5% y se impregnaron en soluci�n saturada de NaHSO3. Posteriormente, el elast�mero modificado se caracteriz� morfol�gicamente mediante microscopio electr�nico de barrido, termogravim�tricamente mediante calor�metro diferencial de barrido; composicionalmente mediante espectroscopia infrarroja, espectroscopia Raman, fluorescencia de rayos X, an�lisis de rayos X por energ�a dispersiva y ensayos hidrof�bicos mediante t�cnicas de �ngulo de contacto, con el fin de establecer la compatibilidad morfol�gica y qu�mica con compuestos inorg�nicos. Los resultados evidenciaron la inclusi�n de grupos funcionales OH, C = O y SO3, la reducci�n del carbono presente en enlaces d�biles y la presencia de componentes inorg�nicos como potasio, sodio, manganeso y azufre. El microscopio electr�nico de barrido muestra un aumento de la rugosidad y de la superficie de contacto del elast�mero en funci�n de la inclusi�n de grupos funcionales polares por tratamiento qu�mico superficial. Estas caracter�sticas generan una mayor inclusi�n y compatibilidad de elast�meros de naturaleza org�nica en compuestos inorg�nicos como las matrices de cemento.
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Authors

Name	Institution	Email
Yaneth Pineda Triana	Universidad Pedag�gica y Tecnol�gica de Colombia	Yaneth.pineda@uptc.edu.co
Carlos Gabriel Hern�ndez Carrillo	Universidad Pedag�gica y Tecnol�gica de Colombia	carlosgabriel.hernandez@uptc.edu.co
Gina Karyn Mora Rodriguez	Universidad Pedag�gica y Tecnol�gica de Colombia	gina.mora@uptc.edu.co

Presentation

Room:	Principal Room
Date:	June 8, 2023
Hour:	11:40 - 12:00

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7^th IMRMPT
Seventh International Meeting for Researchers in Materials and Plasma Technology

Previous editions:

        1st IMRMPT 2011
        2nd IMRMPT 2013
        3rd IMRMPT 2015
        4th IMRMPT 2017
        5th IMRMPT 2019
        5+1 IMRMPT 2021

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