Study on the UV Curing Molding Material in 3D Printing Modification of Expanding Monomer

Most of the phase change materials (PCMs) have been limited to use as functional additions or sealed in containers, and extra auxiliary equipment or supporting matrix is needed. The emergence of 3D printing technique has dramatically advanced the developments of materials and simplified production processes. This study focuses on a novel strategy to model thermal energy storage crystalline gels with three-dimensional architecture directly from liquid resin without supporting materials through light-induced polymerization 3D printing technique. A mask-projection stereolithography printer was used to measure the 3D printing test, and the printable characters of crystalline thermal energy storage P(SA-DMAA) gels with different molar ratios were evaluated. For the P(SA-DMMA) gels with small fraction of SA, the 3D fabrication was realized with higher printing precision both on mili- and micro-meter scales. As a comparison of 3D printed samples, P(SA-DMAA) gels made by other two methods, post-UV curing treatment after 3D printing and UV curing using conventional mold, were prepared. The 3D printed P(SA-DMAA) gels shown high crystallinity. Post–UV curing treatment was beneficial to full curing of 3D printed gels, but did not lead to the further improvement of crystal structure to get higher crystallinity. The P(SA-DMAA) crystalline gel having the highest energy storage enthalpy that reached 69.6 J·g−1 was developed. Its good thermoregulation property in the temperature range from 25 to 40 °C was proved. The P(SA-DMAA) gels are feasible for practical applications as one kind of 3D printing material with thermal energy storage and thermoregulation functionality.

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FabSquare: Fabricating Photopolymer Objects by Mold 3D Printing and UV Curing

IEEE Computer Graphics and Applications ◽

10.1109/mcg.2017.37 ◽

2017 ◽

Vol 37 (3) ◽

pp. 34-42 ◽

Cited By ~ 3

Author(s):

Vahid Babaei ◽

Javier Ramos ◽

Yongquan Lu ◽

Guillermo Webster ◽

Wojciech Matusik

Keyword(s):

3D Printing ◽

Uv Curing

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Modelling the influence of UV curing strategies for optimisation of inkjet based 3D printing

Materials & Design ◽

10.1016/j.matdes.2021.109889 ◽

2021 ◽

pp. 109889

Author(s):

Peng Zhao ◽

Yinfeng He ◽

Gustavo F. Trindade ◽

Martin Baumers ◽

Derek Irvine ◽

...

Keyword(s):

3D Printing ◽

Uv Curing

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Synthesis of diepoxycyclohexylethyl tetramethyldisiloxane and its application to stereolithography 3D printing

Rapid Prototyping Journal ◽

10.1108/rpj-08-2019-0233 ◽

2020 ◽

Vol 26 (9) ◽

pp. 1515-1524

Author(s):

Biwu Huang ◽

Linlin Han ◽

Baolin Wu ◽

Wenbin Zhou ◽

Zhenting Lu

Keyword(s):

3D Printing ◽

Testing Machine ◽

Tensile Modulus ◽

Uv Curing ◽

Mechanical And Thermal Properties ◽

The Novel ◽

Elongation At Break ◽

Content Type ◽

Ft Ir ◽

Cycloaliphatic Epoxy Resins

Purpose The purpose of this study is to synthesize a new kind of a cationic-type UV-curing prepolymer diepoxycyclohexylethyl tetramethyldisiloxane, which is used to replace the current prepolymers’ common cycloaliphatic epoxy resins to prepare a novel 3D printing stereolithography material. Design/methodology/approach Diepoxycyclohexylethyl tetramethyldisiloxane was characterized and analyzed by FT-IR and 1HMR. Diepoxycyclohexylethyl tetramethyldisiloxane was compounded with a polycaprolactone polyol, some acrylates and photoinitiators to prepare a novel 3D printing stereolithography resin (3DPSLR11). Optical properties of 3DPSLR11 were investigated by HRPL-150A stereolithography apparatus and INITELLI-RAY400 UV-curing system. Tensile mechanical properties of printed 3DPSLR11 specimens were tested by WDW-50-type universal testing machine, and the glass transition temperature (Tg) was determined by DMA. Rectangle plates and double-cantilever parts were fabricated by using the stereolithography apparatus with 3DPSLR11 as the printing material, and the dimension shrinkage factors and the curl factors of the parts were investigated. Findings The experimental results showed that the critical exposure (Ec) of the 3D printing 3DPSLR11 was 11.6 mJ/cm2, its penetration depth (Dp) was 0.18 mm, the tensile strength of the cured 3DPSLR11 was 40.1 MPa, the tensile modulus was 1,741.4 MPa, the elongation at break was 15.3%, Tg was 113°C, the dimension shrinkage factor was less than 0.85% and the curl factor was less than 8.00%. Originality/value In this work, a novel 3D printing 3DPSLR11 was prepared with diepoxycyclohexylethyl tetramethyldisiloxane as a main prepolymer. The novel 3DPSLR11 possessed excellent photosensitivity, and its cured products had good mechanical and thermal properties. The accuracy and resolution of the fabricated parts were high with 3DPSLR11 for stereolithography in 3D printing, which showed that 3DPSLR11 has potential application value as 3D printing material.

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Design and Synthesis of Free-Radical/Cationic Photosensitive Resin Applied for 3D Printer with Liquid Crystal Display (LCD) Irradiation

Polymers ◽

10.3390/polym12061346 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1346

Author(s):

Junyang Shan ◽

Zijun Yang ◽

Guoguang Chen ◽

Yang Hu ◽

Ying Luo ◽

...

Keyword(s):

Liquid Crystal ◽

Free Radical ◽

3D Printing ◽

Liquid Crystal Display ◽

Uv Curing ◽

Interpenetrating Polymer Network ◽

Radical Mechanism ◽

Covalent Bonds ◽

Photosensitive Resin ◽

Heating Treatment

In this work, aiming at a UV-curing 3D printing process with liquid crystal display (LCD) irradiation, a novel free-radical/cationic hybrid photosensitive resin was designed and prepared. After testing, the results showed that the acrylate monomers could be polymerized through a free-radical mechanism, while the epoxides were polymerized by a cationic curing mechanism. During the process of UV-curing, the acrylate and epoxide polymers were crosslinked and further locked together by non-covalent bonds. Therefore, an interpenetrating polymer network (IPN) structure could be formed through light-curing 3D-printing processes. Fourier transform infrared spectroscopy (FT-IR) revealed that the 3,4-epoxy cyclohexyl methyl-3,4-epoxy cyclohexyl formate and acrylic resin were both successfully involved in the UV-curing process. Furthermore, in order to make the 3D-printed objects cured completely, post-processing was of great importance. The results from the systematic study of the dynamic mechanical properties of the printed objects showed that the heating treatment process after UV irradiation was very necessary and favorable for the complete cationic polymerization of UV-6110 induced by Irgacure 261. The optimum heating treatment conditions were achieved at a temperature of 70 °C for 3 h.

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Research on the composition of UV curing modified compounds for 3D printing based on HyperChem simulation

Journal of Physics Conference Series ◽

10.1088/1742-6596/2076/1/012052 ◽

2021 ◽

Vol 2076 (1) ◽

pp. 012052

Author(s):

Weicheng Bai ◽

Mengxiao Tao ◽

Xianfeng Zhang ◽

Jun Dong

Keyword(s):

3D Printing ◽

Theoretical Basis ◽

High Performance ◽

Reaction System ◽

Uv Curing ◽

Ceramic Materials ◽

Energy Calculation ◽

Resin System ◽

Reaction Enthalpy ◽

Curing Reaction

Abstract The precursor conversion method provides the possibility of 3D printing ceramic materials, and the resin system with polysilazane as the precursor is expected to prepare high-performance ceramic materials for aviation. In this paper, the UV curing reaction system of polysilazane for 3D printing is taken as the research object, and hyperchem8.0 software is used as the research means. The model construction, chemical bond energy calculation, reaction enthalpy calculation and other modules in the software are used to simulate and predict the reaction process and mechanism of UV curing, which provides a theoretical basis for the selection and optimization of the subsequent UV curing reaction system for 3D printing.

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