Slurry Preparation and Stereolithography for Activated Alumina Catalyst Carrier

doi:10.15541/jim20210604

Abstract

Abstract:

In order to prepare activated alumina catalyst carrier with efficient chemical catalytic reaction and complex fine structure, we prepared a low viscosity, high uniformity and high solid content stereolithographic slurry. Effects of resin ratio and coupling agent modification on the particle size distribution of activated alumina and the stability, uniformity and rheological properties of slurry were studied by particle size analysis and rheological test. When w(HEA) : w(HDDA) : w(TMPTA) : w(modified-EA)=1.5 : 1.0 : 2.5 : 5.0, the viscosity of premix at shear rate 1 s ^-1 is only 0.35 Pa·s. After powder modification, KH560 polymer chain attached to surface of activated alumina, changing the activated alumina from hydrophilic to hydrophobic, which improved the uniformity and stability of slurry, caused steric hydration between powders and reduced powder agglomeration, leading the average diameter of activated alumina being decreased from 4.43 μm to 3.89 μm. Slurry with solid content of 52% (in mass) was prepared by wetting mixing method and then successfully printed. Debounded and sintered activated alumina samples maintains a complex irregular thin-walled structure, and their porosity and density are 51.3% and 1.93 g/cm³, respectively.

Key words: stereolithography, activated alumina, powder surface modification, rheological property

CLC Number:

TQ174

ZHOU Ganghuai, LIU Yao, SHI Yuan, LIU Shaojun. Slurry Preparation and Stereolithography for Activated Alumina Catalyst Carrier[J]. Journal of Inorganic Materials, 2022, 37(3): 297-302.

Figures/Tables 7

Fig. 1 Three-dimensional structure diagram of stereolithographic machine (a) and print model diagram of activated alumina (b)

Fig. 2 XRD pattern of activated alumina

Fig. 3 Mechanic diagram of activated alumina modified by coupling agent

Fig. 4 Particle size distribution (a) and average particle diameter (b) of activated alumina diagram after 2% (mass percentage) KH550, KH560 and KH570 coupling agent modification

Fig. 5 Viscosity diagrams of resin with different monomer ratios

Fig. 6 Viscosity diagram of slurry with different mixing methods of modified activated alumina and resin. Inset shows the enlarged curues under shear rate less than 70 s-1

Fig. 7 Stereolithographic activated alumina sample diagram (a) after debounding and sintering and SEM image (b) of stereolithographic activated alumina sample after debounding and sintering

References 29

[1]	SHI L, YIN Y, WANG S, et al. Rational catalyst design for N₂ reduction under ambient conditions: strategies towards enhanced conversion efficiency. ACS Catalysis, 2020, 10(12): 6870-6899. DOI URL
[2]	LIU L. Multiscale structural characterization of shaped catalysts. Trends in Chemistry, 2021, 3(11): 898-901. DOI URL
[3]	DENG Z Y, FUKASAWA T, ANDO M, et al. High-surface-area alumina ceramics fabricated by the decomposition of Al(OH)₃. Journal of the American Ceramic Society, 2010, 84(3): 485-491. DOI URL
[4]	NIJMEIJER A, KRUIDHOF H, BREDESEN R, et al. Preparation and properties of hydrothermally stable-alumina membranes. Journal of the American Ceramic Society, 2010, 84(1): 136-140. DOI URL
[5]	RODIANSONO, MD ASTUTI, MUJIYANTI D R, et al. Novel preparation method of bimetallic Ni-In alloy catalysts supported on amorphous alumina for the highly selective hydrogenation of furfural. Molecular Catalysis, 2018, 445: 52-60. DOI URL
[6]	HE Y, LIU S, PRIEST C, et al. Atomically dispersed metal-nitrogen- carbon catalysts for fuel cells: advances in catalyst design, electrode performance, and durability improvement. Chemical Society Reviews, 2020, 49(11): 3484-3524. DOI URL
[7]	CHEN R, LIAN Q, WANG J, et al. A stereolithographic diamond- mixed resin slurry for complex SiC ceramic structure. Journal of the European Ceramic, 2021, 41(7): 3991-3999.
[8]	LAKHDAR Y, TUCK C, BINNER J, et al. Additive manufacturing of advanced ceramic materials. Progress in Materials Science, 2021, 116(2/3): 100736. DOI URL
[9]	BIKAS H, STAVROPOULOS P, CHRYSSOLOURIS G. Additive manufacturing methods and modelling approaches: a critical review. The International Journal of Advanced Manufacturing Technology, 2016, 83(1-4): 389-405. DOI URL
[10]	SALMI M. Additive manufacturing processes in medical applications. Materials, 2021, 14(1): 191. DOI URL
[11]	ZHAO S, SIQUEIRA G, D RDOVA S, et al. Additive manufacturing of silica aerogels. Nature, 2020, 584(7821): 387-392. DOI URL
[12]	XING H Y, ZOU B, LIU X Y, et al. Original Fabrication strategy of complicated Al₂O₃-Si₃N₄ functionally graded materials by stereolithography 3D printing. Journal of the European Ceramic Society, 2020, 40(15): 5797-5809. DOI URL
[13]	ZHOU T, ZHANG L, YAO Q, et al. SLA 3D printing of high quality spine shaped β-TCP bioceramics for the hard tissue repair applications. Ceramics International, 2019, 46(6): 7609-7614. DOI URL
[14]	STRAATHOF M H, DRIEL C, LINGEN J, et al. Development of propellant compositions for vat photopolymerization additive manufacturing. Propellants, Explosives, Pyrotechnics, 2020, 45(1): 36-52.
[15]	XU X, AWAD A, MARTINEZ P R, et al. Vat photopolymerization 3D printing for advanced drug delivery and medical device applications. Journal of Controlled Release, 2020, 329(10): 743-757. DOI URL
[16]	WEI L N, JIA M L, ZHOU M, et al. Vat polymerization-based bioprinting-process, materials, applications and regulatory challenges. Biofabrication, 2020, 12(2): 022001. DOI URL
[17]	QUAN H, ZHANG T, XU H, et al. Photo-curing 3D printing technique and its challenges. Bioactive Materials, 2020, 5(1): 110-115. DOI URL
[18]	BAE C J, RAMACHANDRAN A, HALLORAN J W. Quantifying particle segregation in sequential layers fabricated by additive manufacturing. Journal of the European Ceramic Society, 2018, 38(11): 4082-4088. DOI URL
[19]	LIU Y, CHENG L J, LI H, et al. Formation mechanism of stereolithography of Si₃N₄ slurry using silane coupling agent as modifier and dispersant. Ceramics International, 2020, 46(10): 14583-14590. DOI URL
[20]	SUN J, BINNER J, BAI J. Effect of surface treatment on the dispersion of nano zirconia particles in non-aqueous suspensions for stereolithography. Journal of the European Ceramic Society, 2019, 39(4): 1660-1667. DOI URL
[21]	ZHANG J, WEI L, MENG X, et al. Digital light processing- stereolithography three-dimensional printing of yttria-stabilized zirconia. Ceramics International, 2020, 46(7): 8745-8753. DOI URL
[22]	SHUAI Z, NA S, ZHE Z. Surface modification of α-Al₂O₃ with dicarboxylic acids for the preparation of UV-curable ceramic suspensions. Journal of the European Ceramic Society, 2017, 37(4): 1607-1616. DOI URL
[23]	ZHANG K Q, XIE C, WANG G, et al. High solid loading, low viscosity photosensitive Al₂O₃ slurry for stereolithography based additive manufacturing. Ceramics International, 2019, 45(1): 203-208. DOI URL
[24]	DUFAUD O, MARCHAL P, CORBEL S. Rheological properties of PZT suspensions for stereolithography. Journal of the European Ceramic Society, 2002, 22(13): 2081-2092. DOI URL
[25]	WU X, LIAN Q, LI D, et al. Effects of soft-start exposure on the curing characteristics and flexural strength in ceramic projection stereolithography process. Journal of the European Ceramic Society, 2019, 39(13): 3788-3796. DOI URL
[26]	LI X, ZHANG J, DUAN Y, et al. Rheology and curability characterization of photosensitive slurries for 3D printing of Si₃N₄ ceramics. Applied Sciences, 2020, 10(18): 6438. DOI URL
[27]	GENTRY S, HALLORAN J W. Light scattering in absorbing ceramic suspensions: effect on the width and depth of photopolymerized features. Journal of the European Ceramic Society, 2015, 35(6): 1895-1904. DOI URL
[28]	BADEV A, ABOULIATIM Y, CHARTIER T, et al. Photopolymerization kinetics of a polyether acrylate in the presence of ceramic fillers used in stereolithography. Journal of Photochemistry and Photobiology A-Chemistry, 2011, 222(1): 117-122. DOI URL
[29]	ZHANG Y, XU Y, SIMON-MASSERON A, et al. Radical photoinitiation with LEDs and applications in the 3D printing of composites. Chemical Society Reviews, 2021, 50(6): 3824-3841. DOI URL