Stereolithography 3D Printing from Suspensions Containing Titanium Dioxide
- PDF / 1,436,505 Bytes
- 7 Pages / 612 x 792 pts (letter) Page_size
- 37 Downloads / 220 Views
GANIC MATERIALS AND NANOMATERIALS
Stereolithography 3D Printing from Suspensions Containing Titanium Dioxide D. A. Kozlova, b, S. A. Tikhonovaa, P. V. Evdokimova, b, V. I. Putlyaeva, and A. V. Garsheva, * a
bKurnakov
Moscow State University, Moscow, 119991 Russia Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991 Russia *e-mail: [email protected] Received July 27, 2020; revised August 3, 2020; accepted August 4, 2020
Abstract—In view of the wide use of titanium dioxide, more and more approaches to 3D printing of materials based on it have recently been developed, the most promising if which remains stereolithography 3D printing owing to high resolution and low power consumption. It was studied how the degree of crystallinity of titanium dioxide affects both the properties of the obtained suspensions for stereolithography 3D printing, and the sinterability of the printed bulk materials. It was shown that the use of amorphous titanium dioxide as a precursor increases the fraction of the inorganic phase in the suspension, which leads to a significantly smaller shrinkage in sintering. Despite the high critical energy of polymerization and the low photosensitivity of the produced suspensions, the use of amorphous titanium dioxide enabled one to completely remove the polymer binder by high-temperature annealing without significant deformation of the printed samples. Keywords: titanium dioxide, amorphous phase, stereolithography, 3D printing DOI: 10.1134/S0036023620120098
INTRODUCTION Owing to high chemical and heat resistance, and also low cost and simplicity of synthesis, titanium dioxide and materials based on it are widely used in catalysis and heterogeneous photocatalysis [1–6], as materials for sorption and purification [7, 8], and in biomedicine [9–12]. In many applications, important aspects are not only the phase and chemical compositions of such materials, but also their geometry, specific surface area, and micro- and macroporosities. In such cases, the geometric parameters of materials are best controlled by 3D printing [13–18]. This approach gave a good account of itself for producing materials based on titanium dioxide for photocatalytic and biomedical purposes [19–26]. The most developed of the methods of 3D printing of materials based on titanium dioxide are thermal extrusion [19, 20] and robocasting [21–24]. Although the materials produced by thermal extrusion have high photocatalytic [20] and bioactive [12] properties, this method has such a significant disadvantage as a low resolution in 3D printing. The main advantages of the production of materials based on titanium dioxide by robocasting are high specific surface area and the possibility of the complete removal of the organic binder. The thus obtained materials have high sorption and photocatalytic activity [23–26]. However, this method does not allow one to vary widely the geometry of the fabricated materials.
Alternative methods are the method of selective laser melting of titanium with subsequent o
Data Loading...
