Przybek Agnieszka, Łach Michał
Faculty of Material Engineering and Physics, Cracow University of Technology, Jana Pawła II 37, 31-864 Cracow, Poland.
Materials (Basel). 2024 Sep 13;17(18):4503. doi: 10.3390/ma17184503.
Geopolymers are synthesized using anthropogenic raw materials and waste from the energy industry. Their preparation necessitates an alkaline activator, which facilitates the dissolution of raw materials and their subsequent binding. At present, geopolymers are considered a promising material with the potential to replace conventional cement-based products. This research investigates foamed geopolymer materials based on fly ash, natural fibers, and phase-change materials. The study utilized three distinct types of fibers and two phase-change materials manufactured by Rubitherm Technologies GmbH of Germany. This paper presents the results of the thermal conductivity coefficient and specific heat tests on the finished foams. Additionally, compressive strength tests were conducted on the samples after 28 days. Natural fibers decreased the insulation parameter by 12%, while PCM enhanced it by up to 6%. The addition of fibers increased the compressive strength by nearly 30%, whereas PCM reduced this by as little as 14%. Natural fibers and phase-change materials had an increased heat capacity by up to 35%. The results demonstrated the material's potential in various industrial sectors, with the primary areas of application being building materials and insulations. The findings illustrate the significant potential of these composites as energetically and environmentally sustainable materials.
地质聚合物是使用人为原料和能源行业的废料合成的。其制备需要一种碱性活化剂，该活化剂有助于原料的溶解及其后续的粘结。目前，地质聚合物被认为是一种有前途的材料，有潜力替代传统的水泥基产品。本研究调查了基于粉煤灰、天然纤维和相变材料的泡沫地质聚合物材料。该研究使用了三种不同类型的纤维和两种由德国鲁比泰姆技术有限公司生产的相变材料。本文展示了对成品泡沫进行的导热系数和比热测试结果。此外，还对样品在28天后进行了抗压强度测试。天然纤维使隔热参数降低了12%，而相变材料使其提高了高达6%。纤维的添加使抗压强度提高了近30%，而相变材料使其降低了仅14%。天然纤维和相变材料的热容量提高了高达35%。结果证明了该材料在各个工业领域的潜力，主要应用领域是建筑材料和隔热材料。研究结果表明这些复合材料作为能源和环境可持续材料具有巨大潜力。
