新型疏水聚乙烯醇缩甲醛海绵：合成、表征、从污染土壤样品中快速有效吸收有机溶剂。

Novel Hydrophobic Polyvinyl-Alcohol Formaldehyde Sponges: Synthesis, Characterization, Fast and Effective Organic Solvent Uptake from Contaminated Soil Samples.

机构信息

Department of Chemistry, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala 133207, India.

Department of Chemistry, Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran 11001, Saudi Arabia.

出版信息

Molecules. 2022 Dec 2;27(23):8429. doi: 10.3390/molecules27238429.

DOI:10.3390/molecules27238429

PMID:36500521

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9740623/

Abstract

In the present research work, PVFTX-100, PVFSDS, and PVFT-80 sponges were prepared using polyvinyl-alcohol (PVA) with surfactants triton X-100/sodium dodecyl sulfate (SDS)/Tween 80, respectively, for the removal of organic solvents from polluted soil/water samples. All three obtained sponges were further made hydrophobic using dodecyltrimethoxysilane (DTMS). The prepared sponges were characterized using different spectroscopic techniques and SEM analysis. The peaks obtained near 1050 cm and 790 cm were attributed to Si-O-C and alkyl side chain C-H stretching vibration that confirmed the formation of desired sponges. The SEM images showed the random roughness with a number of protrusions on sponge surfaces, which further played an important role in the absorption and retention of organic solvents molecules. The Sears method was chosen to calculate the surface area and pore volume of all the synthesized sponge samples. Among all three prepared sponges, the PVFTX-100 sponge showed a high pore volume and large surface area, with a maximum percentage absorption capacity of 96%, 91%, 89.9%, 85.6%, and 80 for chlorobenzene, toluene, diesel, petrol, and hexane, respectively, after eightcycles. The organic solvent uptake using PVFTX-100, PVFSDS, and PVFT-80 sponges is quite a unique and simple technology, which could be employed at a large scale for contaminated soil/water systems.

摘要

在本研究工作中，分别使用聚乙烯醇（PVA）与表面活性剂曲通 X-100/十二烷基硫酸钠（SDS)/吐温 80 制备了 PVFTX-100、PVFSDS 和 PVFT-80 海绵，用于去除污染土壤/水样中的有机溶剂。所有三种获得的海绵都进一步使用十二烷基三甲氧基硅烷（DTMS）进行疏水化处理。使用不同的光谱技术和 SEM 分析对制备的海绵进行了表征。在 1050cm 和 790cm 附近获得的峰归因于 Si-O-C 和烷基侧链 C-H 伸缩振动，这证实了所需海绵的形成。SEM 图像显示海绵表面具有随机的粗糙度和许多突起，这进一步在吸收和保留有机溶剂分子方面发挥了重要作用。选择 Sears 方法来计算所有合成海绵样品的表面积和孔体积。在所有三种制备的海绵中，PVFTX-100 海绵表现出高的孔体积和大的表面积，在经过八次循环后，对氯苯、甲苯、柴油、汽油和己烷的最大吸收百分比分别为 96%、91%、89.9%、85.6%和 80%。使用 PVFTX-100、PVFSDS 和 PVFT-80 海绵吸收有机溶剂是一种独特而简单的技术，可以大规模应用于污染土壤/水系统。