Ślosarczyk Agnieszka, Klapiszewska Izabela, Jędrzejczak Patryk, Klapiszewski Łukasz, Jesionowski Teofil
Institute of Building Engineering, Faculty of Civil and Transport Engineering, Poznan University of Technology, Piotrowo 3, PL-60965 Poznan, Poland.
Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland.
Polymers (Basel). 2020 May 21;12(5):1180. doi: 10.3390/polym12051180.
In the framework of this publication, silica-lignin hybrid materials were designed, obtained, characterized and then used as admixtures for cement composites. High-energy mechanical grinding of individual components was used to produce the systems that allowed ensuring adequate homogeneity of the final products. As a result of the analysis of Fourier transform infrared spectroscopy, it has been confirmed that weak physical interactions occur between the components. This allowed classifying the resulting systems as I class hybrid materials. In addition, the efficiency of obtaining final products was also inferred on the basis of obtained porous structure parameters and colorimetric data. The achieved bio-admixture with different weight ratios of silica and lignin was added to cement pastes in the amount ranging from 0.5 to 1 wt.%. The study showed that increasing the ratio of lignin in the admixture from 0.15 to 1 wt.% had a positive effect on the rheological properties of the pastes, while the mechanical properties of the composite were deteriorated. In turn, a higher amount of silica in the admixture acted in reverse. The most favorable results were obtained for a silica-lignin bio-admixture with a weight ratio of components equal to 5:1 wt./wt. A significant increase in compressive strength was gained at satisfactory plasticity of the paste.
在本出版物的框架内，设计、制备、表征了二氧化硅-木质素杂化材料，然后将其用作水泥复合材料的外加剂。通过对各组分进行高能机械研磨来制备体系，以确保最终产品具有足够的均匀性。傅里叶变换红外光谱分析结果证实，各组分之间存在弱物理相互作用。这使得所得体系可归类为I类杂化材料。此外，还根据所得的多孔结构参数和比色数据推断了获得最终产品的效率。将具有不同二氧化硅和木质素重量比的生物外加剂以0.5至1 wt.%的量添加到水泥浆体中。研究表明，将外加剂中木质素的比例从0.15 wt.%增加到1 wt.%对浆体的流变性能有积极影响，而复合材料的力学性能则有所下降。反之，外加剂中二氧化硅含量较高时则起相反作用。对于组分重量比为5:1 wt./wt.的二氧化硅-木质素生物外加剂，获得了最有利的结果。在浆体具有令人满意的可塑性的情况下，抗压强度显著提高。
