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《Journal of Forestry Engineering》 2018-01
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Preparation and properties of vacuum insulation panels from sawdust

TU Chunxin;ZHAO Weigang;DAI Dasong;FAN Mizi;School of Materials Engineering,Fujian Agriculture and Forestry University;Civil Engineering Department,School of Engineering and Design,Brunel University;  
Vacuum insulation panels( VIP) is regarded as one of the most promising solutions for high performance thermal insulation,and the insulation performance of VIP mainly depends on the core material. At present,the VIP mostly uses the high cost of fumed silica or non-renewable glass fiber as the core material. In order to reduce the cost of VIP and increase the utilization of wood sawdust,the VIP was prepared with wood sawdust as rawmaterial and epoxy resin as adhesive. The influence of particle size( 30-60 mesh,≥60-100 mesh and ≥100-300 mesh) of wood sawdust and the density of core material( 0.2 g/cm3,0.3 g/cm3,0.4 g/cm3 and 0.5 g/cm3) on the thermal insulation performance of wood sawdust VIP was examined. The results showed that,when the density of the core material was 0.3 g/cm3,with the increase of the particle size of core material,the modulus of rupture( MOR) of the core material increased by only 5%,demonstrating that the particle size of the core material had no obvious effect on the MOR. When the particle size of the core material was ≥100-300 mesh,with the increase of the density of the core material,the MOR of the core material increased by 132%,indicating that the density of the core material had an obvious effect on the MOR. When the density of the core material was 0.2 g/cm3,the MOR of the core material could meet the requirements of the European standard for the insulation materials in the construction application. When the particle size was lower than 300 mesh and the density of the core material was 0.3 g/cm3,with the increase of wood sawdust powder mesh,the average pore size of the core material decreased,the porosity of the core material increased,and the thermal conductivity decreased. When the particle size of wood sawdust was ≥100-300 mesh,with the increase of the core material density,the average pore size and the porosity of the core material decreased,and the thermal conductivity increased. When the particle size of wood powder was ≥100-300 mesh and the core material density was 0.2 g/cm3,the thermal conductivity of wood sawdust VIP reached the lowest value of 0.010 5 W/( m·K).
【Fund】: 福建省产业技术联合创新项目(闽发改高技[2015]518号)
【CateGory Index】: TB34
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