Abstract
Three-dimensional printing based on the digital light processing (DLP) method offers solution processability, fast printing time, and high-quality printing through selective light curing of photopolymers. This research relates to a method of dispersing polyaniline nanofibers (PANI NFs) and graphene sheets in a polyacrylate resin solution for optimizing the conductive solution suitable for DLP-type 3D printing. Dispersion and morphology of the samples with different filler contents were investigated by field emission scanning electron microscope (FE-SEM) and optical microscope (OM) analyses. The polyacrylate composite solution employing the PANI NFs and graphene was printed well with various shapes and sizes through the 3D printing of DLP technology. In addition, the electrical properties of the printed sculptures have been investigated using a 4-point probe measurement system. The printed sculpture containing the PANI NFs and graphene sheets exhibited electrical conductivity (4.00 × 10−9 S/cm) up to 107 times higher than the pure polyacrylate (1.1 × 10−16 S/cm). This work suggests potential application of the PANI NF/graphene cofiller system for DLP-type 3D printing.
Highlights
Of the various technologies that can contribute to the Fourth Industrial Revolution, 3D printing is becoming a future-oriented manufacturing process because it can produce customized products of desired design, shape and size
Methods for 3D printing are divided into several categories, such as material extrusion, digital light processing (DLP), stereolithography (SLA), powder bed fusion, material jetting, binder jetting, powder jet fusion, and so forth
The PANI NFs used in this experiment were prepared by a chemical oxidation polymerization method which was optimized from our previous work [10]. 1.1 × 10−2 mol of aniline was added to 40 mL of
Summary
Of the various technologies that can contribute to the Fourth Industrial Revolution, 3D printing is becoming a future-oriented manufacturing process because it can produce customized products of desired design, shape and size. 3D printing is considered to be an advanced polymer processing technology, since various polymers including polyurethane (PU), polyacrylate, polylactide (PLA), polystyrene (PS), acrylonitrile butadiene styrene (ABS) resin, and polyvinyl chloride (PVC) are used as raw materials [1,2]
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