【摘要】 目的 为提高汉麻秆芯的利用率，减少生物质废弃物对环境造成的污染，以汉麻秆芯为原材料，玻化微珠复配做保温填充物，水泥充当胶凝剂，制备一种环保抗压的包装保温材料。方法 分析汉麻秆芯和玻化微珠的不同复配掺量，对复合材料保温性能、抗压性能、吸水性能和干密度的影响，在最优配比下对比未掺入秆芯的复合材料。结果 保温性能提高60.6%，干密度降低52%，吸水率提高18.4%，同时满足抗压强度等级MU3.5。在此最优配比基础上用不同浓度的NaOH溶液对汉麻秆芯进行处理，并分析微观结构的SEM图。用NaOH质量分数为4%的溶液处理汉麻秆芯，掺入质量分数为20%的汉麻秆芯与7%的玻化微珠复配，抗压能力提升至5.9 MPa，导热系数下降至0.124 3 W/(m·K)，在满足抗压的基础上保温性能最优。结论 汉麻复合材料可为包装防护提供一种新型生物质保温填充材料。更多还原

【Abstract】 To increase the utilization of hemp stalk core and reduce the environmental pollution caused by biomass waste, the work aims to use hemp stalk core as a raw material, vitrified microbeads as insulation fillers and cement as binders, to develop an eco-friendly and compressive packaging insulation material. The effects of various ratios of hemp stalk core and vitrified microbeads on the insulation performance, compressive strength, water absorption, and dry density of the composite material were analyzed. The composite materials without hemp stalk core were compared at the optimal ratio. The insulation performance increased by 60.6%, the dry density decreased by 52%, and the water absorption increased by 18.4%, meeting the compressive strength grade of MU3.5. Based on this optimal ratio, the hemp stalk core was treated with NaOH solutions of different concentrations, and the SEM images of microstructure were analyzed. After treatment with a mass fraction 4% NaOH solution, combined with 20% hemp stalk core and 7% vitrified microbeads, the compressive strength increased to 5.9 MPa, and the thermal conductivity decreased to 0.124 3 W/(m·K), achieving optimal insulation performance while maintaining compressive strength. Hemp composite materials can provide a new biomass insulation filler for protective packaging.更多还原