Department of Chemistry, Materials, and Chemical Engineering G. Natta, Politecnico di Milano, INSTM RU-POLIMI p.zza L. da Vinci 32, 20133 Milano, Italy.
Environ Sci Technol. 2013 Jul 2;47(13):7413-20. doi: 10.1021/es401326a. Epub 2013 Jun 19.
The aim of this research is to assess the sustainability of a natural fiber, such as hemp (Cannabis sativa), and its use as thermal insulator for building applications. The sustainability of hemp was quantified by life cycle assessment (LCA) and particular attention was given to the amount of CO2eq of the whole process, and the indicator greenhouse gas protocol (GGP) was selected to quantify CO2eq emissions. In this study also CO2 uptake of hemp was considered. Two different allocation procedures (i.e., mass and economic) were adopted. Other indicators, such as Cumulative Energy Demand (CED) and EcoIndicator99 H were calculated. The production of 1 ha yielded 15 ton of hemp, whose global warming potential (GWP100) was equal to about -26.01 ton CO2eq: the amount allocated to the technical fiber (20% of the total amount of hemp biomass) was -5.52 ton CO2eq when mass allocation was used, and -5.54 ton CO2eq when economic allocation was applied. The sustainability for building applications was quantified by considering an insulation panel made by hemp fiber (85%) and polyester fiber (15%) in 1 m(2) of wall having a thermal transmittance (U) equal to 0.2 W/m(2)_K. The environmental performances of the hemp-based panel were compared to those of a rockwool-based one.
本研究旨在评估天然纤维（如大麻（Cannabis sativa））的可持续性及其作为建筑应用的隔热材料的用途。大麻的可持续性通过生命周期评估（LCA）进行量化，特别关注整个过程的 CO2eq 量，并选择温室气体协议（GGP）指标来量化 CO2eq 排放。本研究还考虑了大麻的 CO2 吸收量。采用了两种不同的分配程序（即质量和经济）。还计算了其他指标，如累积能源需求（CED）和生态指标 99 H。每公顷产量为 15 吨大麻，其全球变暖潜力（GWP100）约为-26.01 吨 CO2eq：当采用质量分配时，分配给技术纤维（大麻生物质总量的 20%）的量为-5.52 吨 CO2eq，而当采用经济分配时为-5.54 吨 CO2eq。通过考虑由大麻纤维（85%）和聚酯纤维（15%）制成的 1 m(2)墙的隔热板来量化建筑应用的可持续性，该隔热板的热传递系数（U）等于 0.2 W/m(2)_K。大麻基板的环境性能与岩棉基板的性能进行了比较。
