Multimaterial Stereolithography by Crosslinking through Luminescence Excitation

加法制造、快速成型或3D打印指的是以逐层方式制造对象的无数制造技术。它代表着制造业的一场革命，因为它不是特定于一个行业的，而且来自不同行业的许多公司都受益于能够以更低的残留量和二氧化碳排放量在内部高速生产定制样品。因此，3D打印市场正在扩张，预计从2019年到2025年，其全球价值将以21.8%的复合年增长率增长。3D打印技术有很多种，所有这些技术都存在优缺点。只有几种技术是低成本的，这对于使大量用户能够使用它们并产生更高的社会影响至关重要。这是FFF(熔丝制造)和一些光聚合技术的情况，如立体光刻(SLA)、数字光处理(DLP)和液晶显示打印(LCD)。第二个限制是可实现的分辨率，该分辨率决定对象是否对眼睛平滑或层是否可见。第三，很少有技术能够在同一物体上打印多种颜色，或者将不同的材料整合在一起，更不用说在样品中混合导电和非导电材料了。目前，还没有一种技术可以同时克服这三个限制。支持该项目的愿景是开发一种新的3D打印技术，能够首次生产出多材料/多颜色对象，同时保持高分辨率和低成本。为了实现这一雄心勃勃的目标，Musce的目标是开发一种新的光致聚合物3D打印平台，使使用不同树脂连续打印3D部件成为可能。该方法将适用于成本效益高的光致聚合物打印机，只需稍作修改。它将基于工程光学材料的使用和不同波长的打印。

Additive manufacturing, rapid prototyping or 3D printing refer to a myriad of manufacturing techniques that build an object in a layer-by-layer approach. It represents a revolution in manufacturing because it is non-specific for an industry and many companies from different sectors benefit from being able to produce customised samples in-house at high speed and with a lower amount of residues and CO2 footprint. For this reason, the 3D printing market is in expansion, and its global value is projected to increase at a CAGR of 21.8% from 2019 to 2025There are many 3D printing techniques, all of which present advantages and disadvantages. Only a few techniques are low-cost, which is crucial for enabling their use by a high number of users and having a higher societal impact. This is the case of FFF (Fused Filament Fabrication) and some photopolymer techniques such as Stereolithography (SLA), Digital Light Processing (DLP) and Liquid Crystal Display printing (LCD).A second limitation is the achievable resolution that determines whether an object is "smooth-to-eye" or if the layers are visible. Thirdly, few technologies are able to print with more than one colour in the same object, or with different materials integrated in the same piece, let alone mixing conductive and non-conductive materials in a sample. Currently, there is no technique that can overcome these three limitations at the same time.The vision underpinning this project is to develop a new 3D printing technology capable of producing multimaterial/multicolour objects for the first time, while maintaining both high resolution and low cost. For this ambitious target, MUSCLE aims to develop a new platform for photopolymer 3D printing that will enable the sequential printing of 3D pieces with different resins. The method will be applicable to cost-efficient photopolymer printers with minor modifications. It will be based on the use of engineered optical materials and printing at different wavelengths.