Development of low-shrinkage eco-friendly composite materials for the DLP 3D printing technique

IF 5.2 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Wei-Chun Lin, Jui-Fu Tang, Chia-Cheng Cheng, Chia-Chien Kuo and Wei-Hsuan Hung
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Abstract

3D printing technology has emerged as a production method in the past ten years and has attracted great attention in the market. Among various printing systems, digital light processing (DLP) 3D printing has extremely high planar resolution with a smooth sample surface, which is the best advantage of this technology. However, this 3D printing technology currently has three major challenges that urgently need to be improved: (1) the sample has dimensional shrinkage defects after secondary light curing; (2) the mechanical properties of the printed product have a serious tendency to decrease after secondary curing; and (3) the choice of printing materials used lacks diversification. The aforementioned defects will seriously affect the yield of printed products in high-precision manufacturing. In this research, eco-friendly carbon black has been added to the photosensitive resin of DLP to form composites. The mechanical properties of the material, thermogravimetric analysis, material viscosity, surface morphology and size shrinkage were investigated. In the tensile test, the area after the yield point is also significantly prolonged, which indicates better toughness of the composite resins. Adding recycled carbon black to the material can also enhance the heat resistance and thermal stability of the resin without increasing the solution viscosity. The newly synthesized composite resin demonstrated an improved hardness without severe size shrinkage after the post UV curing process, and also provided a new solution to the issue of abandoned tires.

Abstract Image

DLP 3D打印技术低收缩环保复合材料的开发
3D打印技术作为一种生产方式出现在近十年的时间里,在市场上引起了极大的关注。在各种打印系统中,数字光处理(DLP) 3D打印具有极高的平面分辨率和光滑的样品表面,这是该技术的最佳优势。然而,这种3D打印技术目前存在三大亟待改进的挑战:(1)样品在二次光固化后存在尺寸收缩缺陷;(2)印品二次固化后力学性能有严重下降趋势;(3)印刷材料的选择缺乏多样化。在高精度制造中,上述缺陷会严重影响印刷品的良率。本研究将环保炭黑加入到DLP光敏树脂中形成复合材料。考察了材料的力学性能、热重分析、材料粘度、表面形貌和尺寸收缩率。在拉伸试验中,屈服点后的区域也明显延长,表明复合树脂具有较好的韧性。在材料中加入再生炭黑还可以在不增加溶液粘度的情况下增强树脂的耐热性和热稳定性。新合成的复合树脂经紫外光固化后,硬度得到提高,且无明显的尺寸收缩,为废旧轮胎问题提供了新的解决方案。
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来源期刊
Materials Advances
Materials Advances MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
7.60
自引率
2.00%
发文量
665
审稿时长
5 weeks
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