Synthesis and properties of red mud/polydimethylsiloxane composites
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摘要: 采用机械搅拌、真空磁力搅拌消泡和加热固化的方法,在柔性的聚二甲基硅氧烷(PDMS)中填充赤泥制备了赤泥/PDMS复合材料,并对复合材料的结构与形貌、力学性能和热性能进行了表征和分析。结果表明:赤泥作为交联节点和自润滑颗粒提高了复合材料的弹性模量、抗拉强度、邵氏硬度、冲击强度和摩擦磨损性能,其中,冲击强度的提高较显著,从41.13 kJ·m−2增大至273.33 kJ·m−2,增加了565%。此外,赤泥作为不可燃物也提高了复合材料的阻燃性能,极限氧指数从25.7%增大至34.7%,增加了35%,进入难燃材料的范围(>27%)。这有望扩宽这种硅酮材料的应用领域,同时为赤泥的资源化利用和新型赤泥/聚合物复合材料的研究提供参考。Abstract: Red mud/polydimethylsiloxane (PDMS) composites were prepared by filling red mud in flexible PDMS by mechanical stirring, vacuum magnetic stirring defoamination and heating curing. The structure, microstructure, mechanical and thermal properties of the composites were characterized and analyzed. The results show that: Red mud as a cross-linked node and self-lubricating particle improves the elastic modulus, tensile strength, hardness Shore, impact strength and friction and wear properties of the composites, among which the impact strength increases significantly from 41.13 kJ·m−2 to 273.33 kJ·m−2, an increase of 565%. In addition, red mud as a non-combustible also improves the flame retardant performance of the composites, the limiting oxygen index increases from 25.7% to 34.7%, an increase of 35%, into the range of refractory materials (> 27%). This is expected to expand the application field of this silicone material, and provide a reference for the resource utilization of red mud and the research of new red mud/polymer composites.
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Key words:
- red mud /
- red mud utilization /
- padding /
- composites /
- silicone /
- polydimethylsilox
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图 12 赤泥/PDMS复合材料的极限氧指数测试:(a) 0vol%赤泥燃烧前;(b) 0vol%赤泥燃烧后;(c) 40vol%赤泥燃烧前;(d) 40vol%赤泥燃烧后;(e) 极限氧指数
Figure 12. Limiting oxygen index test of red mud/PDMS composites: (a) Before burning of 0vol% red mud; (b) After burning of 0vol% red mud; (c) Before burning of 40vol% red mud; (d) After burning of 40vol% red mud; (e) Limiting oxygen index
图 13 赤泥/PDMS的力学性能和阻燃性能与一些聚合物复合材料的对比[12-13, 20-28]:(a) 抗拉强度对比;(b) 冲击强度对比;(c) 极限氧指数对比
Figure 13. Mechanical properties and flame retardancy of red mud/PDMS compared with some polymer composites[12-13, 20-28]: (a) Tensile strength comparison; (b) Impact strength comparison; (c) Comparison of limiting oxygen index
PVCW—Polyvinyl chloride waste; PE—Polyethylene; PP—Polypropylene; SBR—Polymerized styrene butadiene rubber; PET—Poly(ethylene terephthalate); PF—Phenolic foam
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[1] LIU X, HAN Y X, HE F Y, et al. Characteristic, hazard and iron recovery technology of red mud—A critical review[J]. Journal of Hazardous Materials, 2021, 420: 126542. doi: 10.1016/j.jhazmat.2021.126542 [2] KHANNA R, KONYUKHOV Y, ZINOVEEV D, et al. Red mud as a secondary resource of low-grade iron: A global perspective[J]. Sustainability, 2022, 14(3): 1258. doi: 10.3390/su14031258 [3] YUAN S, LIU X, GAO P, et al. A semi-industrial experiment of suspension magnetization roasting technology for separation of iron minerals from red mud[J]. Journal of Hazardous Materials, 2020, 394: 122579. doi: 10.1016/j.jhazmat.2020.122579 [4] ZHOU G T, WANG Y L, QI T G, et al. Toward sustainable green alumina production: A critical review on process discharge reduction from gibbsitic bauxite and large-scale applications of red mud[J]. Journal of Environmental Chemical Engineering, 2023, 11(2): 109433. doi: 10.1016/j.jece.2023.109433 [5] 李艳军, 张浩, 韩跃新, 等. 赤泥资源化回收利用研究进展[J]. 金属矿山, 2021(4): 1-19. doi: 10.19614/j.cnki.jsks.202104001LI Yanjun, ZHANG Hao, HAN Yuexin, et al. Research progresson resource recycling and utilization of red mud[J]. Metal Mine, 2021(4): 1-19(in Chinese). doi: 10.19614/j.cnki.jsks.202104001 [6] BORRA C R, BLANPAIN B, PONTIKES Y, et al. Recovery of rare earths and other valuable metals from bauxite residue (red mud): A review[J]. Journal of Sustainable Metallurgy, 2016, 2(4): 365-386. doi: 10.1007/s40831-016-0068-2 [7] 景英仁, 景英勤, 杨奇. 赤泥的基本性质及其工程特性[J]. 轻金属, 2001(4): 20-23. doi: 10.3969/j.issn.1002-1752.2001.04.006JING Yingren, JING Yingqin, YANG Qi. Basic properties of red mud and engineering characteristics of it[J]. Light Metal, 2001(4): 20-23(in Chinese). doi: 10.3969/j.issn.1002-1752.2001.04.006 [8] 宋剑峰, 李曼, 梁小良, 等. 改性赤泥协同膨胀型阻燃剂阻燃聚乙烯[J]. 化工进展, 2018, 37(11): 4412-4418. doi: 10.16085/j.issn.1000-6613.2018-0339SONG Jianfeng, LI Man, LIANG Xiaoliang, et al. Red mud modified synergistic intumescent flame retardation to retardant polyethylene[J]. Chemical Industry and Engineering Progress, 2018, 37(11): 4412-4418(in Chinese). doi: 10.16085/j.issn.1000-6613.2018-0339 [9] 雷阳, 吴良喜, 刘玉飞, 等. 赤泥改性聚合物材料研究进展[J]. 塑料, 2023, 52(2): 77-81.LEI Yang, WU Liangxi, LIU Yufei, et al. Research progress of red mud modified polymer materials[J]. Plastics, 2023, 52(2): 77-81(in Chinese). [10] ARIATI R, SALES F, SOUZA A, et al. Polydimethylsiloxane composites characterization and its applications: A review[J]. Polymers, 2021, 13(23): 4258. doi: 10.3390/polym13234258 [11] 余先纯, 孙德林. 胶黏剂与粘接技术基础(第二版)[M]. 北京: 化学工业出版社, 2022: 12-17.YU Xianchun, SUN Delin. Fundamentals of adhesives and bonding technology (2nd edition)[M]. Beijing: Chemical Industry Press, 2022: 12-17(in Chinese). [12] 杨世诚, 孙琦, 谌伦建, 等. 赤泥改性及其对丁苯橡胶复合材料微观结构和力学性能的影响[J]. 化工进展, 2019, 38(7): 3297-3303. doi: 10.16085/j.issn.1000-6613.2018-1953YANG Shicheng, SUN Qi, SHEN Lunjian, et al. Effect of modified red mud on microstructure and mechanical properties of butadiene-styrene rubber composites[J]. Chemical Industry and Engineering Progress, 2019, 38(7): 3297-3303(in Chinese). doi: 10.16085/j.issn.1000-6613.2018-1953 [13] VIGNESHWARAN S, UTHAYAKUMAR M, ARUMUGAPRABU V. Development and sustainability of industrial waste-based red mud hybrid composites[J]. Journal of Cleaner Production, 2019, 230: 862-868. doi: 10.1016/j.jclepro.2019.05.131 [14] 赵国璋. 橡胶基纳米复合材料制备及性能研究[D]. 上海: 上海大学, 2011.ZHAO Guozhang. Preparation and properties of rubber nanocomposites[D]. Shanghai: Shanghai University, 2011(in Chinese). [15] 王梦蛟, 迈克尔·莫里斯. 粒状填料对橡胶的补强 [M]. 北京: 化学工业出版社, 2021: 254-310.WANG Mengjiao, MORRIS Michael. Rubber reinforcement with particulate fillers[M]. Beijing: Chemical Industry Press, 2021: 254-310(in Chinese). [16] JENISH I, GANDHI V C S, RAJ R E, et al. A new study on tribological performance of cissus quadrangularis stem fiber/epoxy with red mud filler composite[J]. Journal of Natural Fibers, 2022, 19(9): 3502-3516. doi: 10.1080/15440478.2020.1848709 [17] SURESH S, SUDHAKARA D. Investigation of mechanical and tribological properties of red mud-reinforced particulate polymer composite[J]. Journal of Bio- and Tribo-Corrosion, 2019, 5(4): 87-94. doi: 10.1007/s40735-019-0279-8 [18] 宋永才, 商瑶, 冯春祥, 等. 聚二甲基硅烷的热分解研究[J]. 高分子学报, 1995(6): 753-757.SONG Yongcai, SHANG Yao, FENG Chunxiang, et al. A study on the pyrolysis of polydimethylsilane[J]. Acta Polymerica Sinica, 1995(6): 753-757(in Chinese). [19] 钱翌, 武洋. 赤泥基水滑石复配MPP对EVA阻燃性能的影响[J]. 合成树脂及塑料, 2018, 35(1): 15-19. doi: 10.3969/j.issn.1002-1396.2018.01.004QIAN Yi, WU Yang. Impact of hydrotalcite based on red mud compounding MPP on flame retarding property of EVA[J]. China Synthetic Resin and Plastics, 2018, 35(1): 15-19(in Chinese). doi: 10.3969/j.issn.1002-1396.2018.01.004 [20] 刘彤. 不同偶联剂改性RM对PVCW/RM复合材料性能的影响[J]. 塑料科技, 2018, 46(1): 59-64. doi: 10.15925/j.cnki.issn1005-3360.2018.01.009LIU Tong. Effect of RM modified by different coupling agents on properties of PVCW/RM composites[J]. Plastic Technology, 2018, 46(1): 59-64(in Chinese). doi: 10.15925/j.cnki.issn1005-3360.2018.01.009 [21] DING C, ZHANG Y, DI X, et al. High-density polyethylene composite filled with red mud: Effect of coupling agent on mechanical and thermal properties[J]. Environmental Technology, 2022, 43(21): 3283-3294. doi: 10.1080/09593330.2021.1921047 [22] 石文建, 刘江, 杨红艳, 等. 赤泥改性PP复合材料制备及结晶性能与力学性能研究[J]. 塑料工业, 2013, 41(5): 43-47. doi: 10.3969/j.issn.1005-5770.2013.05.011SHI Wenjian, LIU Jiang, YANG Hongyan, et al. Research on the crystalline and mechanical properties of red mud filled polypropylene composites[J]. China Plastics Industry, 2013, 41(5): 43-47(in Chinese). doi: 10.3969/j.issn.1005-5770.2013.05.011 [23] LIU J, LI X, ZHOU C. Mechanical and thermal properties of modified red mud-reinforced phenolic foams[J]. Polymer International, 2018, 67(5): 528-534. doi: 10.1002/pi.5540 [24] 李曼, 宋剑峰, 林幸业, 等. 改性赤泥协同卤锑系阻燃剂阻燃LDPE研究[J]. 现代塑料加工应用, 2019, 31(3): 9-11. doi: 10.19690/j.issn1004-3055.20190012LI Man, SONG Jianfeng, LIN Xingye, et al. Modified red mud combined with halo flame retardant to retard LDPE[J]. Processing and Applications, 2019, 31(3): 9-11(in Chinese). doi: 10.19690/j.issn1004-3055.20190012 [25] 马俊易. 阻燃橡胶材料的制备及性能研究[D]. 青岛: 青岛科技大学, 2019.MA Junyi. Preparation and properties offlame retardant rubber materials[D]. Qingdao: Qingdao University of Science and Technology, 2019(in Chinese). [26] 魏宝强, 卢浩, 刘诚. 环氧树脂高效阻燃方法的探索[J]. 井冈山大学学报(自然科学版), 2020, 41(6): 61-66.WEI Baoqiang, LU Hao, LIU Cheng. Explore the efficiency method for falme retardant of epoxy resin[J]. Journal of Jinggangshan University (Natural Science), 2020, 41(6): 61-66(in Chinese). [27] 赵丽萍, 蔡青, 郭正虹. 苯基膦酸铈与十溴二苯醚阻燃玻璃纤维增强聚对苯二甲酸乙二醇酯复合材料[J]. 复合材料学报, 2019, 36(10): 2259-2265. doi: 10.13801/j.cnki.fhclxb.20190522.001ZHAO Liping, CAI Qing, GUO Zhenghong. Cerium phenylphosphonate and decabromodiphenyl oxide for flame retardancy of glass fiber reinforced poly(ethylene terephthalate) composites[J]. Acta Materiae Compositae Sinica, 2019, 36(10): 2259-2265(in Chinese). doi: 10.13801/j.cnki.fhclxb.20190522.001 [28] 邓军, 庞青涛. 六苯氧基环三磷腈泡沫硅胶阻燃特性探究[J]. 西安科技大学学报, 2020, 40(2): 187-194. doi: 10.13800/j.cnki.xakjdxxb.2020.0201DENG Jun, PANG Qingtao. Flame retardant characteristics of hexaphenoxycyclo-triphosphazene silicone foam[J]. Journal of Xi'an University of Science and Technology, 2020, 40(2): 187-194(in Chinese). doi: 10.13800/j.cnki.xakjdxxb.2020.0201 -