重组竹/玻纤/PET泡沫复合多层结构保温板制备及性能评价

  目的  为了促进木质结构保温板(SIP)的可持续发展，引入具有优良力学性能及装饰效果的可再生重组竹，结合环保型粉状环氧树脂胶黏剂，制备了重组竹/结构保温板复合材料。  方法  通过差示扫描量热法(DSC法)、力学性能测试和导热系数测试研究粉状环氧树脂胶黏剂的固化特性及复合材料的结合强度、抗弯强度、导热系数及耐热水性。  结果  ①粉状环氧树脂胶黏剂的最佳固化条件为84 ℃开始发生固化反应，在116 ℃时充分固化，于180 ℃下体系完全固化。②当涂胶量为150 g·m?2，热压时间为15 min时，重组竹/结构保温板复合材料的结合强度和抗弯强度分别可达0.83和19.80 MPa，导热系数为0.054 2 W·m?1·K?1(25 ℃)。在80 ℃热水浸泡3 h后，复合材料的结合强度仍达0.15 MPa。  结论  获得综合性能优异且具有良好耐热水性的重组竹/结构保温板复合材料。图6表2参21

Preparation and performance evaluation of bamboo scrimber/glass fiber/PET foam multilayer structural insulated panel

[Objective]The purpose of this study is to introduce renewable bamboo scrimber with excellent mechanical properties and decorative effect,combined with environment-friendly powdery epoxy resin adhesive,to prepare bamboo scrimber/structural insulated panel,so as to promote the sustainable development of woody structural insulated panel(SIP).[Method]The curing characteristics of powdery epoxy resin adhesive and bonding strength,flexure strength,thermal conductivity as well as hot-water resistance were investigated by differential scanning calorimetry(DSC),mechanical property test and thermal conductivity tester.[Result](1)The optimal curing condition of powdery epoxy resin adhesive was that the curing reaction began at 84℃,curing thoroughly at 116℃,and curing completely at 180℃.(2)When the amount of glue was150 g·m^-2and the hot pressing time was 15 min,the tensile bonding strength and flexure strength of the composite reached 0.83 MPa and 19.8 MPa respectively,and the thermal conductivity was 0.0542 W·m^-1·K^-1(25℃).After being soaked in hot water at 80℃for 3 h,the bonding strength of the composite still reached 0.15 MPa.[Conclusion]The bamboo scrimber/structural insulated panel composite with excellent comprehensive properties and good hot-water resistance is obtained.