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

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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Experimental studies for the additive manufacturing of continuous fiber reinforced composites using UV-curing thermosets

10.25518/esaform21.3807 ◽

2021 ◽

Author(s):

Eckart Kunze ◽

Michael Müller-Pabel ◽

Oliver Weißenborn ◽

Ron Luft ◽

Johann Faust ◽

...

Keyword(s):

Additive Manufacturing ◽

3D Printing ◽

High Performance ◽

Uv Curing ◽

High Potential ◽

Fiber Reinforced ◽

Continuous Fiber ◽

Print Head ◽

Lightweight Structures ◽

Thermoset Resin

The economical production of lightweight structures with tailor-made properties and load-adapted geometry is limited using conventional technologies. Additive manufacturing processes offer a high potential to meet these requirements, where the established solutions are based primarily on thermoplastics matrix systems. From a process-technological point of view, thermoplastics enable simplified processing, but only a limited range of applications for high-performance components. These limitations are due to their comparatively low heat resistance, low melting temperatures and limited adhesion to embedded reinforcing fibers. In contrast, thermosets show high potential for realization of high- performance lightweight structures with adaptable properties. The present work employs a UV-curing thermoset resin for the impregnation of a continuous filament strand for 3D printing. The main challenge is to reconcile the crosslinking reaction of the thermoset and the process velocity during impregnation and cure. The liquid polymer must provide low initial viscosity to impregnate the filaments and a sufficiently high cure rate and dimensional stability after discharge from the print head to ensure sufficient bonding strength to the substrate. To demonstrate feasibility, a prototypic print head with UV-LED activation was designed and implemented. With a robot-guided printing platform, the 3D-deposition of continuous fiber-reinforcements without additional supporting structures can be realized. To derive initial process parameters, reaction and thermos-mechanical properties are determined by rheometer measurements. Impregnation and cure behavior of the glass fiber reinforced resin is investigated. The presented results provide a reliable process window and a straightforward process monitoring method for further enhancement of the conceived 3D printing process.

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Formulation of a Model Resin System for Benchmarking Processing-Property Relationships in High-Performance Photo 3D Printing Applications

Materials ◽

10.3390/ma13184109 ◽

2020 ◽

Vol 13 (18) ◽

pp. 4109

Author(s):

Jianwei Tu ◽

Kamran Makarian ◽

Nicolas J. Alvarez ◽

Giuseppe R. Palmese

Keyword(s):

3D Printing ◽

High Performance ◽

Mechanical Analysis ◽

Resin System ◽

Processing Property ◽

High Mechanical Strength ◽

Reinforced Composite ◽

And Performance ◽

Tan Δ

A well-defined resin system is needed to serve as a benchmark for 3D printing of high-performance composites. This work describes the design and characterization of such a system that takes into account processability and performance considerations. The Grunberg–Nissan model for resin viscosity and the Fox equation for polymer Tg were used to determine proper monomer ratios. The target viscosity of the resin was below 500 cP, and the target final Tg of the cured polymer was 150 °C based on tan-δ peak from dynamic mechanical analysis. A tri-component model resin system, termed DA-2 resin, was determined and fully characterized. The printed polymer exhibited good thermal properties and high mechanical strength after post-cure, but has a comparatively low fracture toughness. The model resin will be used in additive manufacturing of fiber reinforced composite materials as well as for understanding the fundamental processing–property relationships in light-based 3D printing.

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Rational Design of a High Performance and Robust Solar Evaporator via 3D‐Printing Technology

Advanced Materials ◽

10.1002/adma.202102649 ◽

2021 ◽

pp. 2102649

Author(s):

Sourav Chaule ◽

Jongha Hwang ◽

Seong‐Ji Ha ◽

Jihun Kang ◽

Jong‐Chul Yoon ◽

...

Keyword(s):

3D Printing ◽

High Performance ◽

Rational Design ◽

Printing Technology ◽

3D Printing Technology

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Preparation of fluorine-free superhydrophobic and wear-resistant cotton fabric with a UV curing reaction for self-cleaning and oil/water separation

RSC Advances ◽

10.1039/d0ra10060a ◽

2021 ◽

Vol 11 (8) ◽

pp. 4660-4671

Author(s):

Yaofa Luo ◽

Shuang Wang ◽

Xihan Fu ◽

Xiaosheng Du ◽

Haibo Wang ◽

...

Keyword(s):

Cotton Fabric ◽

Uv Curing ◽

Water Separation ◽

Wear Resistant ◽

Curing Reaction ◽

Oil Water Separation ◽

Oil Water ◽

Self Cleaning

A durable superhydrophobic, self-cleaning cotton fabric based on UV curing was prepared and used in the field of oil/water separation.

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High-Speed 3D Printing of High-Performance Thermosetting Polymers via Two-Stage Curing

Macromolecular Rapid Communications ◽

10.1002/marc.201700809 ◽

2018 ◽

Vol 39 (7) ◽

pp. 1700809 ◽

Cited By ~ 45

Author(s):

Xiao Kuang ◽

Zeang Zhao ◽

Kaijuan Chen ◽

Daining Fang ◽

Guozheng Kang ◽

...

Keyword(s):

3D Printing ◽

High Speed ◽

High Performance ◽

Two Stage ◽

Thermosetting Polymers

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3D printing of high-performance micro-supercapacitors with patterned exfoliated graphene/carbon nanotube/silver nanowire electrodes

Science China Technological Sciences ◽

10.1007/s11431-020-1763-5 ◽

2021 ◽

Author(s):

Lang Liu ◽

JunYong Lu ◽

XinLin Long ◽

Ren Zhou ◽

YingQuan Liu ◽

...

Keyword(s):

Carbon Nanotube ◽

3D Printing ◽

High Performance ◽

Silver Nanowire ◽

Exfoliated Graphene

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Design aspects of (super)hydrophobic mesh based oil-collecting device with improved efficiency

SN Applied Sciences ◽

10.1007/s42452-021-04179-2 ◽

2021 ◽

Vol 3 (1) ◽

Author(s):

Weikang Xu ◽

Zhentao Zhang ◽

Xiaomei Cai ◽

Yazhen Hong ◽

Tianliang Lin ◽

...

Keyword(s):

3D Printing ◽

Water Surface ◽

High Performance ◽

Oil Spills ◽

Real Life ◽

Oily Wastewater ◽

Coating Materials ◽

The Past ◽

Oil Storage ◽

Future Success

AbstractEffective treatment of frequent oil spills and endless discharged oily wastewater is crucial for the ecosystem and human health. In the past two decades, the collection of oil from water surface has been widely studied through the simple fabrication of superhydrophobic meshes with various coating materials, but little attention is paid to the design aspects of the meshes based oil-collecting device and practical oil collection. Here, 3D-printing devices with different configurations of (super)hydrophobic meshes, circular truncated cone (CTC), cylinder and inverted CTC, and the same inverted cone-shaped structure (below the meshes for temporary oil storage) are investigated. Results demonstrate that the CTC meshes based device especially for an oblate one not only shows higher stability and discharge of the collected oils than previous reports, but also allows floating oils to enter the (super)hydrophobic mesh faster. We anticipate that future success in developing high-performance (super)hydrophobic meshes and the further optimization of the CTC mesh-based device parameters will make our proposed device more practical for the treatment of real-life oil spills.

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