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3D printed - Wiley Online Library

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Last Updated: 10 May 2022

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Charge Transfer Complexes (CTCs) with Pyridinium Salts: Towards Efficient Dual Photochemical/Thermal Initiators and 3D Printing Applications

Charge Transfer Complexes is considered as a useful way to increase visible chemistry reaction in both organic and polymer synthesis. We report herein on the construction of a range of useful CTCs using pyridinium salts as effective electron acceptors in order to achieve a multi-wavelength LED photopolymerization process under mild conditions. Both optical absorption spectra and molecular modeling confirmed the UV’s potential absorption wavelength range in the UV spectrum. These latest pyridinium salt acceptors extend the applicability of visible photopolymerizable resins and additive-containing formulations for efficient surface and deep curing.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/marc.202200314


Patent law and 3D printing applications in response to COVID‐19: Exceptions to inventor rights

Additive manufacturing, which converts digital 3D models' data into tangible physical objects, is uniquely well-positioned to solve the shortage of critical medical equipment by allowing the manufacture and repair of medical devices in a timely and cost-effective manner. During the COVID 19 crisis, this paper explores the issue of patent rights being at odds with access to essential 3D printable health products. It also considers the exception for experimental use and demands that a defense of an experimental use extends to repairs.

Source link: https://onlinelibrary.wiley.com/doi/10.1111/jwip.12224


Surrogate‐assisted optimization of 3D printed ceramic nonuniform nonplanar microstrip filter

In a cost-effective and low-cost manner, herein, by using 3D printing technology and a data-driven optimization strategy, the development of a ceramic material-based nonplanar microstrip filter is considered. To generate a map between inputs and outputs of the unit element model, Then commonly used state-of-the-art regression algorithms had been used to produce precise and fast surrogate models. Since then, the Grey Wolf Optimization algorithm had been used for the design optimization of a bandpass filter.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/mop.33295


Experimental and numerical investigation on the mechanical and electrical properties of multiwalled carbon nanotube/waterborne polyurethane coated 3D printing carbon fiber reinforced composites

To create a performance monitoring system for composites, mechanical characteristics and failure behavior of 3D printed carbon fiber reinforced composite composites coated with multiwalled carbon nanotube /waterborne polyurethane conductive coating were investigated. The connection between the stress of composite part's strain and the coating's electrical resistance change rate is confirmed. Moreover, multi-scale tests reveal the failure mechanism including compositecoating debonding, brittle fracture of polyamide matrix, fiber cracking, and pull-out in the composite part, as well as longitudinal fracture of WPU matrix and MWCNT pullout in the coating component.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/pc.26699


Microscopic structure, viscoelastic behaviour and 3D printing potential of milk protein concentrate‐hydrocolloid complex coacervates

This article investigated the effect of a large variety of hydrocolloids on the microstructures, viscoelastic characteristics, and 3D printing results of milk protein concentrate ink for extrusion-based 3D food printing. The presence of hydrocolloids enhanced MPC 3D printability by creating a complex network of protein particles and hydrocolloids, according to the authors, guar gum, pectin, and carrageenan help maintain the deposited 3D structures of MPC ink greater than xanthan.

Source link: https://onlinelibrary.wiley.com/doi/10.1111/ijfs.15775


Effects of printing direction on quasi‐static and dynamic compressive behavior of 3D printed short fiber reinforced polyamide‐based composites

The compressive characteristics of cylindrical specimens were affected by printing directions closely associated with the fiber orientation, according to the study. Because the fabric direction was parallel to the application loading direction, the introduction of short fiber reinforced specimens had the highest elastic modulus and yield strength. Different failure modes were observed with increasing strain rates, short fiber reinforced polyamide with different fiber orientations.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/pat.5696


Free and forced vibration analysis of 3D printed bioinspired sandwich beam using HSDT: Numerical and experimental study

The bioinspired PLA core is 3D printed by fused deposition modeling, and a GFRP skin is created using hand layup methods. The complexity of the bioinspired core and the skin's elastic modulus is assessed using the alternative dynamic method and ASTM E1876, respectively. The natural frequencies change dramatically by the pattern of the core in the bioinspired sandwich beam. Using Higher Order Shear Deformation Theory, a parametric investigation of the sandwich beam for four different 3D printed bioinspired PLA cores and ply configuration of the GFRP skin has been published.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/pc.26644


Full color 3D printing of anatomical models

In reaction to the shortage of cadaver specimens and poor simulation results of anatomical specimen substitutes, we propose an efficient method for fabricating human anatomical specimens. To create digital models and corresponding mapped textures, high precision was used by digital human data with high accuracy. Based on the anatomical structures' histological properties, the digital models were printed with full-color and multimaterial 3D printing methods. Anatomy researchers and surgeons were then invited to compare the 3D printed models with authentic anatomical specimens in terms of morphological appearance, anatomical detail, and textural properties. Flexible and hard materials were mixed in the skull model, and the brain and hand muscles models used hard plastic. Full-color and multi-material 3D printed anatomical models have the same physical and tactile characteristics as anatomical specimens, and they can be used to complement or supplement anatomy instruction to compensate for cadaver shortages.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/ca.23875

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions