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一种用于抑制煤炭自燃的膨胀型纳米抑制剂的表征与性能测试

Characterization and Performance Testing of an Intumescent Nanoinhibitor for Inhibiting Coal Spontaneous Combustion.

作者信息

Huang Zhian, Song Donghong, Zhang Yinghua, Yin Yichao, Hu Xiangming, Gao Yukun, Yang Yifu, Tian Ye

机构信息

State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology Beijing), Ministry of Education, Beijing 100083, China.

Key Laboratory of Mining Disaster Prevention and Control (Shandong University of Science and Technology), Qingdao, Shandong 266590, China.

出版信息

ACS Omega. 2022 May 11;7(20):17202-17214. doi: 10.1021/acsomega.2c00998. eCollection 2022 May 24.

DOI:10.1021/acsomega.2c00998
PMID:35647455
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9134418/
Abstract

Considering disadvantages such as the low thermal stability and environmental pollution of existing gel inhibitors, a green and stable intumescent nanoinhibitor (INI) was prepared and tested. First, polyacrylamide (PAM), nano-silica, and intumescent flame retardant (IFR) were selected as raw materials. The INI was prepared by nanoparticle modification and cross-linking polymerization. Then, the structure and physical properties of INI were tested by Fourier transform infrared spectroscopy, scanning electron microscopy, and rheological experiments. Meanwhile, the inhibition performance of INI was studied through thermogravimetric analysis-Fourier transfer infrared spectroscopy (TGA-FTIR) analysis. The results suggest that the nanomodification improved the dispersibility of INI particles. The addition of modified nano-silica (MNS) and IFR enhances the strength of the reticular structure, thereby improving the transport convenience and covering ability of the INI gel. At high temperatures, IFR can generate a porous foamed carbon layer that further coats the coal. After INI inhibition treatment, the characteristic temperature and activation energy of coal were significantly improved, and the production of carbon monoxide and carbon dioxide decreased. Hence, irrespective of physical properties, physical inhibition performance, or chemical inhibition performance, INI performed well. Research results can provide valuable references for the preparation and performance study of a coal spontaneous combustion inhibitor.

摘要

考虑到现有凝胶抑制剂存在热稳定性低和环境污染等缺点，制备并测试了一种绿色稳定的膨胀型纳米抑制剂（INI）。首先，选用聚丙烯酰胺（PAM）、纳米二氧化硅和膨胀型阻燃剂（IFR）作为原料。通过纳米颗粒改性和交联聚合制备INI。然后，通过傅里叶变换红外光谱、扫描电子显微镜和流变学实验对INI的结构和物理性能进行测试。同时，通过热重分析-傅里叶变换红外光谱（TGA-FTIR）分析研究INI的抑制性能。结果表明，纳米改性提高了INI颗粒的分散性。改性纳米二氧化硅（MNS）和IFR的加入增强了网状结构的强度，从而提高了INI凝胶的传输便利性和覆盖能力。在高温下，IFR可生成多孔泡沫碳层，进一步包覆煤体。经过INI抑制处理后，煤的特征温度和活化能显著提高，一氧化碳和二氧化碳的生成量减少。因此，无论在物理性能、物理抑制性能还是化学抑制性能方面，INI都表现良好。研究结果可为煤自燃抑制剂的制备和性能研究提供有价值的参考。

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