Yulian Chen , Lei Miao , Shunxiang Wang , An Wei , Xulan Lu , Yongjin Zou , Cuili Xiang , Songwen Fang , Lixian Sun , Fen Xu
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引用次数: 0
Abstract
With the increasing demand for environmentally friendly flame retardants for wood, there is a pressing need for efficient and eco-friendly flame retardants. In this study, a novel flame-retardant coating was synthesized using a simple self-assembly impregnation method. Positively charged polyethyleneimine (PEI) was coated on the wood surface via impregnation. Negatively charged ammonium polyphosphate (APP) and montmorillonite (MMT/K10) composites were attached to the PEI surface. Finally, copper sulfate (CuSO4)-sodium alginate (SA) was encapsulated on the wood surface as a protective layer. Analysis of the cone calorimetry data showed that the self-assembled treated wood (SCAKP-W) suppressed the heat release and mass loss appreciably. It was found that the peak heat release rate (pHRR) of untreated wood was 275.1 kW/m2 and the total heat release (THR) was 17.2 MJ/m2, whereas the flame retardant-treated wood (SCAKP-W) had a pHRR of 179.4 kW/m2 and a THR of 13.0 MJ/m2, a considerable reduction of 34.8 % and 24.5 %, respectively. In the thermogravimetry (TG) test, the SCAKP-W had a high residual carbon (34.5 %) at 800 °C. Importantly, the SCAKP-W achieved a UL-94 V-0 rating and ultrahigh limiting oxygen index (LOI) of 57.3 %. These results indicated that the highly efficient flame retardants obtained by a simple impregnation self-assembly method can be adapted to the environment and have great potential for application as surface flame retardants.
期刊介绍：
Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology.
Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal.
However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.
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