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Flame retardant activity of SiO[sub]2-coated regenerated cellulose fibresHribernik, Silvo ...An alternative route to lower the flammability of viscose fibres is presented.Instead of adding a flame retardant to the viscose dope chemically, we have grown a layer of silica (SiO2) on the surface ... of a regenerated cellulose fibre via a sol-gel process. One set of samples was used as-received, while the other was pre-treated in an 18% NaOH solution, giving arough, etched surface to the fibre. The different surface morphology of both fibre types triggered a different growth of silica layers. On an untreated fibre, silica formed a 300-400 nm thick surface layer containing a high density of cracks and holes. Conversely, on a NaOH pre-treated fibre, the silica layer intruded into fibre interior, adhered more tightly to the fibre structure and formed an almost defect-free, thin (100 nm) layer on the outer fibre surface. This type of silica layer increased the temperature at which the fibre started to decompose by 20 °C. It also hindered significantly the flow of oxygen to the generated volatiles during the thermal decomposition, and increased the temperature of glowing combustion of the residual char; the temperature of the corresponding exothermic peaks increased by ca. 20 °C and 40 °C. In contrast, the thermal effects of silica coatings that grew on an untreated fibre were much smaller.Vir: Polymer degradation and stability. - ISSN 0141-3910 (Vol. 92, no. 11, 2007, str. 1957-1965)Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasleLeto - 2007Jezik - angleškiCOBISS.SI-ID - 3823130
Avtor
Hribernik, Silvo |
Sfiligoj-Smole, Majda |
Stana-Kleinschek, Karin |
Bele, Marjan |
Jamnik, Janko |
Gaberšček, Miran
Teme
kemija materialov |
regenerirana celulozna vlakna |
ognjevarnost |
premazi |
silicijev dioksid |
termične lastnosti |
zaviralci gorenja |
chemical modification of materials |
regenerated cellulose fibres |
flammability |
coatings |
SiO2 |
thermal properties |
flame retardants
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Hribernik, Silvo | 27558 |
Sfiligoj-Smole, Majda | 04171 |
Stana-Kleinschek, Karin | 07814 |
Bele, Marjan | 11517 |
Jamnik, Janko | 10180 |
Gaberšček, Miran | 00582 |
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