用指甲花处理的椰壳纤维作为聚氨酯复合材料合成中潜在的增强填料

Coir Fibers Treated with Henna as a Potential Reinforcing Filler in the Synthesis of Polyurethane Composites.

作者信息

Członka Sylwia, Strąkowska Anna, Kairytė Agnė

机构信息

Faculty of Chemistry, Institute of Polymer and Dye Technology, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland.

Laboratory of Thermal Insulating Materials and Acoustics, Faculty of Civil Engineering, Institute of Building Materials, Vilnius Gediminas Technical University, Linkmenu St. 28, LT-08217 Vilnius, Lithuania.

出版信息

Materials (Basel). 2021 Feb 27;14(5):1128. doi: 10.3390/ma14051128.

DOI:10.3390/ma14051128

PMID:33673702

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7957822/

Abstract

In this study, coir fibers were successfully modified with henna (derived from the plant) using a high-energy ball-milling process. In the next step, such developed filler was used as a reinforcing filler in the production of rigid polyurethane (PUR) foams. The impact of 1, 2, and 5 wt % of coir-fiber filler on structural and physico-mechanical properties was evaluated. Among all modified series of PUR composites, the greatest improvement in physico-mechanical performances was observed for PUR composites reinforced with 1 wt % of the coir-fiber filler. For example, on the addition of 1 wt % of coir-fiber filler, the compression strength was improved by 23%, while the flexural strength increased by 9%. Similar dependence was observed in the case of dynamic-mechanical properties-on the addition of 1 wt % of the filler, the value of glass transition temperature increased from 149 °C to 178 °C, while the value of storage modulus increased by ~80%. It was found that PUR composites reinforced with coir-fiber filler were characterized by better mechanical performances after the UV-aging.

摘要

在本研究中，采用高能球磨工艺成功地用指甲花（源自植物）对椰壳纤维进行了改性。下一步，将这种开发的填料用作硬质聚氨酯（PUR）泡沫生产中的增强填料。评估了1%、2%和5%重量比的椰壳纤维填料对结构和物理机械性能的影响。在所有改性的PUR复合材料系列中，观察到用1%重量比的椰壳纤维填料增强的PUR复合材料在物理机械性能方面有最大的改善。例如，添加1%重量比的椰壳纤维填料时，压缩强度提高了23%，而弯曲强度提高了9%。在动态力学性能方面也观察到类似的相关性——添加1%重量比的填料时，玻璃化转变温度值从149℃提高到178℃，而储能模量值提高了约80%。研究发现，用椰壳纤维填料增强的PUR复合材料在紫外线老化后具有更好的机械性能。