Preparation and Characterization of Alumina-coated Hollow Quartz Fiber Reinforced Al₂O₃-SiO₂ Aerogel Composite

Abstract

Al₂O₃-SiO₂ sols were synthesized by using aluminum chloride hex hydrate and tetraethoxysilane (TEOS) as precursors, deionized water and ethanol mixture as the solvent, and propylene oxide as the coagulant aids. Alumina coatings were prepared on the surfaces of hollow quartz filament fiber, then a new lightweight and thermal insulating material were successfully prepared by impregnating Al₂O₃-SiO₂ sol into a needle fabric made by coated hollow quartz filament fiber. The coated quartz fiber, aerogels and composites were characterized by Fourier transform infrared spectroscopy(FTIR), X-ray diffraction(XRD), energy dispersive spectroscopy(EDS), nitrogen adsorption-desorption(BET), scanning electron microscopy(SEM), transmission electron microscopy(TEM), and tensile tests. The effects of different fiber and calcination temperatures on the microstructures and properties of Al₂O₃-SiO₂ composite aerogels were investigated. The test results indicate that the mechanical properties of the aerogels are improved by introducing quartz filament fabrics and the introduction of alumina coating improves the thermal stability of the material. Compared to other fibers, Al₂O₃-coated hollow quartz fiber has significant advantages as reinforcement for composite, and their tensile strength is well retained after high temperature heat treatment.

Keywords

Al₂O₃-SiO₂ aerogel composites / hollow quartz fiber / thermal insulation property / thermal stability

References

[1] Tsirlin A M, Shcherbakova G I, Florina E K, et al. Nano-Structured Metal-Containing Polymer Precursors for High Temperature Non-Oxide Ceramics and Ceramic Fibers—Syntheses, Pyrolyses and Properties[J]. Eur. Ceram. Soc., 2002, 22(14): 2577-2585.

[2] Levine S R, Opila E J, Halbig M C, et al. Evaluation of Ultra-High Temperature Ceramics Foraeropropulsion Use[J]. Eur. Ceram. Soc., 2001, 22(14–15): 2757-2767.

[3] Feng J Z, Zhang C R, Feng J, et al. Carbon Aerogel Composites Prepared by Ambient Drying and Using Oxidized Polyacrylonitrile Fibers as Reinforcements[J]. Appl. Mater. Interfaces, 2011, 3(12): 4796-4803.

[4] Lu T, Li Q, Chen W, et al. Composite Aaerogels Based on Dialdehyde Nanocellulose and Collagen for Potential Applications as Wound Dressing and Tissue Engineering Scaffold[J]. Compos. Sci., Technol., 2014, 94: 132-138.

[5] Jian H, Li X, Dong S, et al. Ultra-Low Thermal Conductivity and High Strength of Aerogels/Fibrous Ceramic Composites[J]. J. Eur. Ceram. Soc., 2016, 36(6): 1487-1493.

[6] Wu L, Huang Y, Wang Z, et al. Fabrication of Hydrophobic Alumina Aerogel Monoliths by Surface Modification and Ambient Pressure Drying[J]. Appl. Surf. Sci., 2010, 256(20): 5973-5977.

[7] Poco J F, Satcher J H Jr, Hrubesh L W. Synthesis of High Porosity, Monolithic Alumina Aerogels[J]. J. Non-Cryst. Solids., 2001, 285: 57-63.

[8] Aravind P R, Mukundan P, Pillai P K, et al. Mesoporous Silica-Alumina Aerogels with High Thermal Pore Stability Through Hybrid Sol-Gel Route Followed by Subcritical Drying[J]. Microporous Mesoporous Mater., 2006, 96(1–3): 14-20.

[9] Faure Benjamin Alphonse, et al. Thermal Stabilization of Alumina Modified by Lanthanum[J]. Microporous Mesoporous Mater, 2014, 196: 191-198.

[10] Church J S, Cant N W, Trimm D L. Stabilisation of Aluminas by Rare Earth and Alkaline Earth Ions[J]. Appl. Catal. A-Gen., 1993, 101(1): 105-116.

[11] Al-Yassir N, Mao R. Thermal Stability of Alumina Aerogel Doped with Yttrium Oxide, Used as a Catalyst Support for the Thermocatalytic Cracking (TCC) Process: An Investigation of Its Textural and Structural Properties[J]. Appl. Catal. A-Gen., 2007, 317(2): 275-283.

[12] Horiuchi T, Osaki T, Sugiyama T, et al. Maintenance of Large Surface Area of Alumina Heated at Elevated Temperatures Above 1 300 DegreeC by Preparing Silica-Containing Pseudoboehmite Aerogel[J]. J. Non-Cryst. Solids, 2001, 291(3): 187-198.

[13] Douy A. Crystallisation of Amorphous Spray-Dried Precursors in the Al₂O₃-SiO2 System[J]. J. Eur. Ceram. Soc., 2006, 26(8): 1447-1454.

[14] Zu G, Shen J, Zou L, et al. Nanoengineering Super Heat-Resistant, Strong Alumina Aerogels[J]. Chem. Mater., 2013, 25(23): 4757-4764.

[15] Wu X, Shao G, Shen X, et al. Novel Al₂O₃-SiO₂ Composite Aerogels with High Specific Surface Area at Elevated Temperatures with Different Alumina/Silica Molar Ratios Prepared by a Non-Alkoxide Sol-Gel Method[J]. RSC Adv., 2016, 6(7): 5611-5620.

[16] Yang X, Jing W, Shi D, et al. Comparative Investigation of Creep Behavior of Ceramic Fiber-Reinforced Alumina and Silica Aerogel[J]. Mater. Sci. Eng., A., 2014, 609(15): 125-130.

[17] Lyu S Q, Yang X G, Shi D Q, et al. Effect of High Temperature on Compression Property and Deformation Recovery of Ceramic Fiber Reinforced Silica Aerogel Composites[J]. Sci. China Technol. Sci., 2017, 60: 1681-1691.

[18] Xu L, Jiang Y, Feng J, et al. Infrared-Opacified Al₂O₃-SiO₂ Aerogel Composites Reinforced by SiC-Coated Mullite Fibers for Thermal Insulations[J]. Ceram. Int., 2015, 41(1): 437-442.

[19] Lu H R, Wang C A. Fabrication and Characterization of Ceramic Coatings with Alumina-Silica Sol-Incorporated α-Alumina Powder Coated on Woven Quartz Fiber Fabrics[J]. Ceram. Int., 2013, 39(6): 6041-6050.

[20] Mochida I, Yoon S H, Takano N, et al. Microstructure of Mesophase Pitch-Based Carbon Fiber and Its Control[J]. Carbon., 1996, 34(8): 941-956.

[21] Wang L, Huang Y D, Liu L. High Temperature Mechanical Property of Al₂O₃ Coated Quartz-Fiber Reinforced Methyl Silicon Resin Composites[J]. Key Eng. Mater., 2007, 351: 135-141.

[22] Munhoz A H, Novickis R W, Fa Ldini S B, et al. Development of Pseudoboehmites for Nanosystems to Release Acyclovir[J]. Adv. Sci. Technol., 2010, 76: 184-189.

[23] Mizushima Y, Hori M. Properties of Alumina Aerogels Prepared under Different Conditions[J]. J. Non-Cryst. Solids., 1994, 167(1–2): 1-8.

[24] Keysar S, Shter G E, Hazan Y D, et al. Heat Treatment of Alumina Aerogels[J]. Chem. Mater., 1997, 9(11): 2464-2467.

[25] Wu X, Shao G, Cui S, et al. Synthesis of a Novel Al₂O₃-SiO₂ Composite Aerogel with High Specific Surface Area at Elevated Temperatures Using Inexpensive Inorganic Salt of Aluminum[J]. Ceram. Int., 2016, 42(1): 874-882.

[26] Yi X B, Zhang L L, Wang F Y, et al. Mechanically Reinforced Composite Aerogel Blocks by Self-Growing Nanofibers[J]. RSC Adv., 2014, 4: 48601-48605.

[27] Wang T, Zhang Z, Dai C, et al. Amorphous Silicon and Silicates-Stabilized ZrO₂ Hollow Fiber with Low Thermal Conductivity and High Phase Stability Derived From a Cogon Template[J]. Ceram. Int., 2019, 45(6): 7120-7126.

[28] Lee S C. Enhanced Thermal Performance of Fibrous Insulation Containing Nonhomogeneous Fibers[J]. J. Quant. Spectrosc. Radiat. Transfer., 1993, 50(2): 199-209.

[29] Kling S, Czigany T. A Comparative Analysis of Hollow and Solid Glass Fibers[J]. Text. Res. J., 2015, 83(16): 1764-1772.

[30] Gu X, Trusty P A, Butler E G, et al. Deposition of Zirconia Sols on Woven Fibre Preforms Using a Dip-Coating Technique[J]. J. Eur. Ceram. Soc., 2000, 20(6): 675-684.

[31] Chen H, Sui X, Zhou C, et al. Preparation and Characterization of Mullite Fiber-Reinforced Al₂O₃-SiO₂ Aerogel Composites[J]. Key Eng. Mater., 2016, 697: 360-363.

[32] Wen S, Ren H, Zhu J, et al. Fabrication of Al₂O₃ Aerogel-SiO₂ Fiber Composite with Enhanced Thermal Insulation and High Heat Resistance[J]. J. Porous MAT., 2018, 26(4): 1-8.

[33] Wu H, Chen Y, Chen Q, et al. Synthesis of Flexible Aerogel Composites Reinforced with Electrospun Nanofibers and Microparticles for Thermal Insulation[J]. J. Nanomater., 2013: 375093