Stereolithography is a solid freeform technique (SFF) that was introduced in the late 1980s Although many other techniques have been developed since then, stereolithography remains one of the most powerful and versatile of all SFF techniques It has the highest fabrication accuracy and an increasing number of materials that can be processed is becoming available In this paper we discuss the characteristic features of the stereolithography technique and compare it to other SFF techniques The biomedical applications of stereolithography are reviewed, as well as the biodegradable resin materials that have been developed for use with stereolithography Finally, an overview of the application of stereolithography in preparing porous structures for tissue engineering is given

A review on stereolithography and its applications in biomedical engineering

Melt electrospun fibers of poly(ϵ-caprolactone) are accurately deposited using an automated stage as the collector. Matching the translation speed of the collector to the speed of the melt electrospinning jet establishes control over the location of fiber deposition. In this sense, melt electrospinning writing can be seen to bridge the gap between solution electrospinning and direct writing additive manufacturing processes.

Direct writing by way of melt electrospinning

Additive manufacturing of continuous fiber reinforced polymer composites: Design opportunities and novel applications

Applications of electrospinning in human health: From detection, protection, regulation to reconstruction

https://onlinelibrary.wiley.com/doi/pdf/10.1002/mame.202100410

Electrospun Nanofibers: Materials, Synthesis Parameters, and Their Role in Sensing Applications

A novel 3D printing strategy for continuous glass fiber reinforced polylactic acid (CGF/PLA) composites was proposed. CGF/PLA filament was prepared by a melting impregnation device, and then CGF/PLA filament was directly supplied to the self-modified 3D printing device. The impregnation process was optimized systematically, and the fiber content reached up to 45 wt%. A specific compatibilizer was used and the amount of compatibilizer was optimized to enhance the interfacial bonding between fiber and polymer. The effects of printing parameters such as nozzle diameter, edge width, layer thickness, printing speed and temperature on the mechanical properties and microstructure of the final printed products were studied. The flexural strength and flexural modulus of the printed products reached 312 MPa and 21.5 GPa, respectively. The fabrication strategies proposed in this study can provide a low-cost and high-strength method for the industrial application of 3D printed continuous fiber reinforced thermoplastic composites.

Optimization of printing parameters of 3D-printed continuous glass fiber reinforced polylactic acid composites

Nanofibers or nanofibrous membranes prepared by electrospinning possess many attractive properties, including excellent mechanical properties, high specific surface area and high porosity, making them attractive for sensor application, especially for the electrochemical sensors. Many nanomaterials are used as additives to improve the conductivity, sensitivity and selectivity of sensors. Based on the different modifiers of electrode materials, electrochemical sensors can be divided into enzyme sensors and non-enzyme sensors. In this review, we summarize the recent progress of the electrochemical sensors fabricated by electrospinning, including hydrogen peroxide (H2O2) sensors, glucose sensors and other sensors. In addition, the sensing mechanisms of various electrochemical sensors are introduced in detail. Finally, future research directions of electrochemical sensors based on electrospinning and the challenges faced by large-scale applications of electrospun electrochemical sensors are presented.

Electrochemical Sensors Fabricated by Electrospinning Technology: An Overview

Impregnation modeling and preparation optimization of continuous glass fiber reinforced polylactic acid filament for 3D printing

In order to improve the throughput and plasticizing capability of traditional single screw extruder (SSE), grooves at the inner surface of barrel were extended from the feeding zone to the melting zone of the extruder. However, the melting behavior and plasticizing quality of polymers in the grooved SSE can not be observed and measured intuitively because of the closed structure of the extruder. In this study, four types of detection techniques, including visualization technology, ultrasound testing, melt pressure on-line detecting and mechanical properties analysis, were developed to characterize the plasticizing capability of SSE with grooved melting zone. Four screws with different compression ratios were also utilized to investigate the plasticizing performance of SSE with grooved melting zone. The procedure conditions, such as barrel temperature and screw speed, were also analyzed. The experimental results showed that cooperating with an anti-compression ratio screw, SSE with grooved melting zone had a reasonable melt pressure, improved throughput and great plasticizing performance, which was very promising in the polymer processing industry.

Characterization of plasticizing process of single screw extruder with grooved melting zone

Vacuum bagging (VB) technology has become an important method for low-cost preparation of advanced composites materials. In this work, continuous glass fiber-reinforced polyamide-6 (GF/PA-6) composites were successfully manufactured bt VB process, utilizing the anionic polymerization of caprolactam (a monomer of PA-6). The effects of vacuum pressure, curing temperature, curing time on the monomer conversion, crystallinity, and mechanical properties of the composites were investigated by the self-made experimental platform. The results indicated that the number of fiber layers affected the properties of products by affecting the thickness of composites. Vacuum pressure mainly affected the impregnation process of resin on fiber, and the product performance was the best at 1 bar. The flexural strength and flexural modulus of the composites reached the highest when the curing temperature was 150°C and the curing time was 90 min, which were 273.92 MPa and 14.04 GPa respectively, while the interlaminar shear strength (ILSS) was highest at 170°C, up to 42.73 MPa. 

Optimization of process parameters for the preparation of continuous glass fiber‐reinforced Nylon 6 composites by vacuum bagging process

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