Photocurable modification of inorganic fillers and their application in photopolymers for 3D printing

Liu, Yang; Lin, Yucong; Jiao, Ting; Lu, Gang; Liu, Jie

doi:10.1039/c9py01445d

Cited by 48 publications

(33 citation statements)

References 52 publications

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“…On the one hand, it was reported in several studies that the incorporation of additives to pristine resins, even in low percentages, can modify tensile strength, Young modulus, flexural strength, fracture toughness, and hardness significantly [23]. In this sense, the shape, size, and other properties of the additive play a decisive role in the modification of these properties [24,25]. On the other hand, the dispersed particles can scatter the light, and thus the penetration of the UV light can be reduced by affecting the processability [26].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterisation of Acrylic Resin-Al Powder Composites Suitable for Additive Manufacturing

et al. 2020

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Stereolithography is an additive manufacturing technology commonly used to build either prototypes or final parts. Nevertheless, the manufacture of structural parts has been ruled out owing to the poor mechanical properties of conventional UV-curable resins. Moreover, the inventory of available commercial resins is still limited and they exhibit low thermal and electrical conductivity values. In this work, some composite materials were designed using Al microparticles dispersed within an SLA commercial resin matrix. These composites overcame the difficulties caused by the light scattering effect during the photopolymerisation process in the SLA technology. Dispersion of the filler was characterised by means of SEM/EDX and AFM. The composites exhibited improved thermal and mechanical behaviour in comparison with the pristine resin. The simplicity of the synthesis method used to prepare the composites provides a convenient starting point to explore new ways of designing composites for SLA with improved mechanical and functional properties.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterisation of Acrylic Resin-Al Powder Composites Suitable for Additive Manufacturing

et al. 2020

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“…[17][18][19][20] Pure polymer products obtained by 3D printers are only often used for conceptual prototypes, due to their inherent lack of appropriated mechanical properties and functionality. [13,21] To improve the mechanical properties and enhance functionalities of 3D printed objects, different types of filler are selected to polymers to form different kinds of composite materials, such as fibers [22,23] , particles [24][25][26] and nanomaterials [27,28] .There are also many researchers developing UV-curable particle-free ceramic compositions for stereolithography-based 3D printing technologies, which is a potential alternative to the common particle-based compositions. [29] For example, SiOC ceramics with varied lattice structures can be produced using different polysiloxanes as preceramic polymers (PCPs) via photopolymerisation-based digital-light-processing 3D printing and pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Photopolymerization of Zeolite Filler‐Based Composites for Potential 3D Printing Application and Gas Adsorption Applications

Zhang

Gao

Josien

et al. 2021

Adv Materials Technologies

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In recent years, photopolymerization has been found wide applications in industry and daily life, while many defective properties of polymers limit their development, including compressive strength, mechanical properties and functions. Furthermore, zeolites are microporous solids with many industrial applications.As fillers they can improve mechanical properties of zeolite/polymer composite and transfer their properties to composites. Here we reported the fabrication of composites with very high filler contents (80-95 wt%) under mild photopolymerization conditions (visible LED light irradiation, room temperature, under air). Compared to pure poly(ethylene glycol) diacrylate (PEGDA) polymer, mechanical properties have been greatly improved, and the storage modulus increased by nearly 20-fold compared to that of pure polymer. After debinding/sintering of composites by high temperature treatment, zeolite porosity is preserved with good adsorption capacities. Some step-like object with 3D structure was also obtained by an original 3D printing technique noted "layer by layer Molding/Curing". Hence, as a great breakthrough, this work is expected to lead to a valuable development in the field of photopolymerization in quite highly filled composites. This also will expand their potential applications for 3D printing in the fields of high-performance lightweight materials and adsorption, and opens the door to a new process of zeolite shaping.

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“…Meanwhile, this 3D printing technology requires highly active photoinitiating systems developed to give access to thick or filled samples upon visible LED irradiation. [6][7][8][9][10] However, until now, many photopolymerization reactions are still limited to UV irradiation, although the UV light with high intensity is usually harmful and dangerous. 11,12 Therefore, the exploration for photopolymerization sensitive to visible light with low ecological impact is becoming the research subject of huge interest.…”

Section: Introductionmentioning

confidence: 99%

Allyloxy ketones as efficient photoinitiators with high migration stability in free radical polymerization and 3D printing

Noirbent

Brunel

et al. 2021

Dyes and Pigments

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Five ketone derivatives (ketone-1~ketone-5) never synthesized in the literature and containing the same peripheral 1,3-bis(allyloxy)benzene substituting group but different central cyclohexanone cores were designed and proposed as highperformance photoinitiators for the free radical polymerization of acrylates under mild conditions. In combination with an amine and an iodonium salt (Iod), these ketones could initiate the photopolymerization of di(trimethylolpropane) tetraacrylate (TA), a tetrafunctional acrylates monomer, upon visible LED irradiation at room temperature in both thick films (1.4 mm) and thin films (25 μm) conditions. The distinct photopolymerization profiles of acrylates were studied by real time Fourier transform infrared spectroscopy, which indicated that the ketone-2/amine/Iod system could induce the highest final conversion of acrylates in thick films condition, while ketone-5/amine/Iod system could induce the highest final conversion of acrylates in thin films condition. Photoreactivity of ketone-2 and ketone-5 was systematically investigated by steady state photolysis and fluorescence quenching experiments in the presence of an amine and an iodonium salt, respectively. Moreover, eminent migration stability of ketones in photocured TA was observed. Finally, the ketone-2 and ketone-5-based three-component photoinitiating systems were applied for the laser writing experiments of TA, and macroscopically tridimensional patterns were fabricated with an excellent spatial resolution.

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Photocurable modification of inorganic fillers and their application in photopolymers for 3D printing

Abstract: The reinforcement of photo-crosslinkable calcium sulfate whiskers and their reaction mechanism in photopolymers for 3D printing technology.

Cited by 48 publications

References 52 publications

Synthesis and Characterisation of Acrylic Resin-Al Powder Composites Suitable for Additive Manufacturing

Synthesis and Characterisation of Acrylic Resin-Al Powder Composites Suitable for Additive Manufacturing

Photopolymerization of Zeolite Filler‐Based Composites for Potential 3D Printing Application and Gas Adsorption Applications

Allyloxy ketones as efficient photoinitiators with high migration stability in free radical polymerization and 3D printing

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