疏水改性纳米氧化镁对短氟碳链泡沫性能影响

doi:10.16085/j.issn.1000-6613.2023-1348

摘要/Abstract

摘要：

为了解决短氟碳链泡沫稳定性差的缺点，采用硬脂酸对氧化镁纳米颗粒（MNPs）疏水改性得到不同水接触角的G-MNPs，研究疏水改性MNPs对短氟碳链泡沫性能和灭火性能的影响。采用硬脂酸对MNPs分别改性60min、90min、120min和150min，测试了G-MNPs表面形态、粒径分布、疏水性、热稳定性以及溶液分散度，研究了疏水改性对泡沫稳定性、发泡能力、泡沫粗化、灭火性能和抗烧性能等的影响。结果表明，硬脂酸疏水改性时间为120min时，改性MNPs水接触角最大，达到138.4°；G-MNPs表面形貌粗糙度增加，颗粒粒径增大，高温下热稳定性良好；疏水改性对泡沫溶液表面张力和黏度几乎没有影响；疏水角为90.0°时，G-MNPs泡沫溶液发泡性能、稳定性能、灭火性能、抗烧性能达到最佳。

关键词: 硬脂酸, 疏水改性, 纳米氧化镁, 短氟碳链泡沫, 灭火性能

Abstract:

In order to solve the problem of poor stability of short fluorocarbon chain foam, G-MNPs with different water contact angles were obtained by hydrophobic modification of magnesium oxide nanoparticles (MNPs) with stearic acid. The effects of hydrophobic modified MNPs on the performance and fire extinguishing performance of short fluorocarbon chain foam were studied. MNPs were modified by stearic acid for 60min, 90min, 120min and 150min, respectively. The surface morphology, particle size distribution, hydrophobicity, thermal stability and solution dispersion of the modified MNPs were tested. The effects of hydrophobic modification on foam stability, foaming ability, foam coarsening, fire extinguishing performance and burning resistance were studied. The results showed that when the hydrophobic modification time of stearic acid was 120min, the water contact angle of modified MNPs was the largest, reaching 138.4°. The surface roughness of the modified MNPs increased, the particle size increased, and the thermal stability was good at high temperature. Hydrophobic modification had little effect on the surface tension and viscosity of the foam solution. When the hydrophobic angle was 90.0°, the foaming performance, stability, fire extinguishing performance and burning resistance of the modified MNPs foam solution were the best.

Key words: stearic acid, hydrophobic modification, magnesium nano oxide particles(MNPs), short fluorocarbon chain foam, fire extinguishing performance

中图分类号:

X937

欧红香, 闵政, 薛洪来, 曹海珍, 毕海普, 王钧奇. 疏水改性纳米氧化镁对短氟碳链泡沫性能影响[J]. 化工进展, 2024, 43(9): 5177-5184.

OU Hongxiang, MIN Zheng, XUE Honglai, CAO Haizhen, BI Haipu, WANG Junqi. Effect of hydrophobic modified magnesium oxide nanoparticles on the properties of short fluorocarbon chain foam[J]. Chemical Industry and Engineering Progress, 2024, 43(9): 5177-5184.

图/表 18

参考文献 19

1	Patrik SOBOLČIAK, POPELKA Anton, TANVIR Aisha, et al. Some theoretical aspects of tertiary treatment of water/oil emulsions by adsorption and coalescence mechanisms: A review[J]. Water, 2021, 13(5): 652.
2	WU Yining, FANG Sisi, ZHANG Kaiyi, et al. Stability mechanism of nitrogen foam in porous media with silica nanoparticles modified by cationic surfactants[J]. Langmuir, 2018, 34(27): 8015-8023.
3	LI Yuanyuan, XIAO Guoqing, CHEN Chunyan, et al. Foam stability properties of eco-friendly three-phase foam system reinforced by polydopamine@KH560/(octyl)-trimethoxysilane modified basalt[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2021, 627: 127147.
4	ZHU Qian, ZHOU Hualei, SONG Yingxiao, et al. Modification and investigation of silica particles as a foam stabilizer[J]. International Journal of Minerals, Metallurgy, and Materials, 2017, 24(2): 208-215.
5	BINKS Bernard P. Particles as surfactants—Similarities and differences[J]. Current Opinion in Colloid & Interface Science, 2002, 7(1/2): 21-41.
6	SHENG Youjie, XUE Menghua, ZHANG Shanwen, et al. Role of nanoparticles in the performance of foam stabilized by a mixture of hydrocarbon and fluorocarbon surfactants[J]. Chemical Engineering Science, 2020, 228: 115977.
7	SHENG Youjie, XUE Menghua, ZHANG Shanwen, et al. Effect of xanthan gum and silica nanoparticles on improving foam properties of mixed solutions of short-chain fluorocarbon and hydrocarbon surfactants[J]. Chemical Engineering Science, 2021, 245: 116952.
8	CHEN Shuyan, LIU Hongjuan, YANG Jingjing, et al. Bulk foam stability and rheological behavior of aqueous foams prepared by clay particles and alpha olefin sulfonate[J]. Journal of Molecular Liquids, 2019, 291: 111250.
9	Weiqin LYU, LI Ying, LI Yaping, et al. Ultra-stable aqueous foam stabilized by water-soluble alkyl acrylate crosspolymer[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014, 457: 189-195.
10	BASHIR Ahmed, SHARIFI HADDAD Amin, RAFATI Roozbeh. Nanoparticle/polymer-enhanced alpha olefin sulfonate solution for foam generation in the presence of oil phase at high temperature conditions[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2019, 582: 123875.
11	SHENG Youjie, PENG Yunchuan, YAN Canbin, et al. Influence of nanoparticles on rheological properties and foam properties of mixed solutions of fluorocarbon and hydrocarbon surfactants[J]. Powder Technology, 2022, 398: 117067.
12	YAN Hong, ZHANG Xuehu, WEI Liqiao, et al. Hydrophobic magnesium hydroxide nanoparticles via oleic acid and poly(methyl methacrylate)-grafting surface modification[J]. Powder Technology, 2009, 193(2): 125-129.
13	HUANG Jie, LIANG Guozhou, LU Gang, et al. Conservation of acidic papers using a dispersion of oleic acid-modified MgO nanoparticles in a non-polar solvent[J]. Journal of Cultural Heritage, 2018, 34: 61-68.
14	KANG Taeho, LEE John Hwan, Seong-Geun OH. Dispersion of surface-modified silica nanoparticles in polyamide-imide (PAI) films for enhanced mechanical and thermal properties[J]. Journal of Industrial and Engineering Chemistry, 2017, 46: 289-297.
15	YU Mengting, YANG Lu, YAN Limei, et al. ZnO nanoparticles coated and stearic acid modified superhydrophobic chitosan film for self-cleaning and oil-water separation[J]. International Journal of Biological Macromolecules, 2023, 231: 123293.
16	RASID Shahrul Aida AB, MAHMOOD Syed M, KECHUT Nor Idah, et al. A review on parameters affecting nanoparticles stabilized foam performance based on recent analyses[J]. Journal of Petroleum Science and Engineering, 2022, 208: 109475.
17	LI Songyan, QIAO Chenyu, LI Zhaomin, et al. Properties of carbon dioxide foam stabilized by hydrophilic nanoparticles and hexadecyltrimethylammonium bromide[J]. Energy & Fuels, 2017, 31(2): 1478-1488.
18	YU Keyi, LIANG Yong, MA Guanxiang, et al. Coupling of synthesis and modification to produce hydrophobic or functionalized nano-silica particles[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2019, 574: 122-130.
19	SHENG Yifeng, LIN Kuanting, BINKS Bernard P, et al. Ultra-stable aqueous foams induced by interfacial co-assembly of highly hydrophobic particles and hydrophilic polymer[J]. Journal of Colloid and Interface Science, 2020, 579: 628-63.

组分	泡沫液
组分	FP-0	FP-1	FP-2	FP-3
FS-3100	4	4	4	4
SDS	6	6	6	6
XG	0.2	0.2	0.2	0.2
纳米颗粒	8（MNPs）	8（G-MNPs1）	8（G-MNPs2）	8（G-MNPs3）

组分	泡沫液
组分	FP-0	FP-1	FP-2	FP-3
FS-3100	4	4	4	4
SDS	6	6	6	6
XG	0.2	0.2	0.2	0.2
纳米颗粒	8（MNPs）	8（G-MNPs1）	8（G-MNPs2）	8（G-MNPs3）

样品	质量分数/%
样品	C	O	Mg
MNPs	0	60.70	39.30
G-MNPs1	14.37	59.16	26.27
G-MNPs2	26.83	58.31	14. 86
G-MNPs3	33.06	56.70	10.24
G-MNPs4	33.02	56.73	10.25

样品	质量分数/%
样品	C	O	Mg
MNPs	0	60.70	39.30
G-MNPs1	14.37	59.16	26.27
G-MNPs2	26.83	58.31	14. 86
G-MNPs3	33.06	56.70	10.24
G-MNPs4	33.02	56.73	10.25

参数	FP-0	FP-1	FP-2	FP-3
界面张力/mN·m^-1	2.63	2.64	2.64	2.63
平均粒径/nm	39.0	73.5	83	88.5
脱附能/kJ·mol^-1	1.26	44782.49	17908.77	4372.38