학술논문
Structural and flame retardancy properties of GO-DOPO-HAK composite.
Document Type
Article
Author
Mihis, Alin Grig; Cotet, Liviu Cosmin; Cadar, Calin; Pop, Lucian Cristian; Todea, Milica; Rusu, Mihai Marius; Vulpoi, Adriana; Székely, István; Sălăgean, Cătălin Alexandru; Magyari, Klara; Muresan-Pop, Marieta; Cadar, Oana; Baia, Monica; Sofran, Ioana Emilia; Lisa, Gabriela; Anghel, Ion; Baibarac, Mihaela; Danciu, Virginia; Baia, Lucian
Source
Subject
*FIREPROOFING
*FIREPROOFING agents
*ZETA potential
*GRAPHENE oxide
*X-ray diffraction
*HEAT capacity
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Language
ISSN
0022-2461
Abstract
In the view of the advantages of using P, N, Si and graphene oxide (GO) for the development of flame retardants materials, a multi-structure synergistic composite was synthesized by grafting a novel nitrogen-containing polyhedral oligomeric silsesquioxane (HAK) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) on the surface of GO nanosheet. In the first step, 2-hydroxyethyl acrylate was selectively reacted, and then, HAK was synthetized by the condensation of the aza-Michael addition product with 3-(methacryloyloxy)propyltrimethoxysilane. Finally, the GO obtained by an innovative variant of Marcano-Tour improved exfoliation method was functionalized, first with DOPO, and then with HAK. The structural, morphological and surface properties of GO and GO-DOPO-HAK were investigated by means of XRD, TEM–EDX, FT-IR, Raman, zeta potential and XPS techniques, and it was evidenced the functionalization of GO with DOPO, and then with HAK. The performed microscale combustion calorimetry (MCC) and TG measurements indicated a great potential of the GO-DOPO-HAK as flame retardant material as the obtained residual weight for this sample was found to be the highest one compared to the other investigated samples. MCC analyses further revealed a major decrease in heat release capacity (HRC) and a significant increase in char yield, results that confirm the great potential of GO-DOPO-HAK as flame retardancy material. [ABSTRACT FROM AUTHOR]