Research on Preparation and Release Characteristics of Odor Reference Samples Based on PTFE/SiO2 Porous Membranes
Year: 2025
Type: article
Abstract: 针对气味标准样品稳定性差、散发速率不可控等问题，本研究设计了一种基于气体扩散原理的筒式气味散发装置，并开发了PTFE/SiO2多孔膜的冷压制备技术。通过调控SiO2粉末的目数、配比及工艺参数，实现多孔膜孔径与孔隙率的精准调控。基于此制备了正丁醇、甲基环戊酮等五种气味标准样品，利用重量法和环境舱法对其散发特性及稳定性进行了研究。实验表明，正丁醇与甲基环戊酮样品在20天内的质量变化线性关系显著(R2 ≥ 0.99)，且可通过调节膜参数、温度及面积实现散发速率的定向优化。本研究提出了标准气味样品制备的新方法，对推动嗅觉检测标准化具有重要的理论与技术支撑作用。To address issues such as poor stability and uncontrollable release rates of odor reference samples, this study designed a cartridge-type odor release device based on the principle of gas diffusion and developed a cold-pressing fabrication technique for PTFE/SiO2 porous membranes. By regulating the mesh size and ratio of SiO2 powder, as well as process parameters, precise control over the pore size and porosity of the porous membranes was achieved. Based on this approach, five odor reference samples including 1-Butanol and 2-Methylcyclopentanone were prepared. Their release characteristics and stability were quantitatively assessed through gravimetric analysis and the environmental chamber method. Experimental results demonstrated that the mass variations of 1-Butanol and 2-Methylcyclopentanone samples exhibited significant linear relationships (R2 ≥ 0.99) over 20 days. The release rates could be directionally optimized by adjusting membrane parameters, temperature, and surface area. This study proposes a novel approach for odor reference samples preparation, providing crucial theoretical and technical support for advancing the standardization of olfactory detection.
Source: Material Sciences
Author: 依婷 贾
Language: English
Subfield: Process Chemistry and Technology
Field: Chemical Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4412639243