Separation Process Comparison of Hydrogel Film and PTFE Film in Vat Photopolymerization

IF 1 Q4 ENGINEERING, MANUFACTURING

Journal of Micro and Nano-Manufacturing Pub Date : 2022-06-27 DOI:10.1115/msec2022-85380

F. Yang, Aamer A. Kazi, Caleb Liu, Bruce Tai

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引用次数: 0

Abstract

In constrained surface vat photopolymerization, the separation process between a newly printed layer and the vat film has long been a limiting factor for printing speed and feature size. This paper aims to compare the performance of a hydrogel film and a conventionally used polytetrafluoroethylene (PTFE) in terms of separation forces, vertical separation distances, and dimensional accuracies of the printed parts. PTFE is commonly adopted because of its low surface energy and thus low separation force, while the hydrogel film is hypothetically effective because of its repelling nature to the non-polar characteristic in most photopolymers. A custom-designed building platform with an integrated sensor is used to continuously sample the force at 1,000Hz with 0.1N resolution. The separation distance is calculated based on the ascending and descending force profiles. The results show a 26% reduction in separation forces and a 60% reduction in vertical separation distances, with 95% statistical significance when comparing the hydrogel film to the PTFE film. The dimensional accuracies of produced parts in both films are similar.

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还原光聚合中水凝胶膜与聚四氟乙烯膜分离工艺的比较

在受限表面还原光聚合中，新打印层与还原膜之间的分离过程一直是影响打印速度和特征尺寸的限制因素。本文旨在比较水凝胶膜和常规使用的聚四氟乙烯(PTFE)在分离力、垂直分离距离和打印部件尺寸精度方面的性能。聚四氟乙烯通常被采用，因为它的表面能低，因此分离力低，而水凝胶膜是假设有效的，因为它对大多数光聚合物的非极性特性具有排斥性质。使用定制设计的集成传感器的建筑平台，以0.1N分辨率连续采样1000hz的力。分离距离是根据上升和下降的力分布计算的。结果表明，与聚四氟乙烯膜相比，水凝胶膜的分离力减小了26%，垂直分离距离减小了60%，具有95%的统计学意义。在这两种胶片中，生产零件的尺寸精度是相似的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Micro and Nano-Manufacturing ENGINEERING, MANUFACTURING-

CiteScore

2.70

自引率

0.00%

发文量

期刊介绍： The Journal of Micro and Nano-Manufacturing provides a forum for the rapid dissemination of original theoretical and applied research in the areas of micro- and nano-manufacturing that are related to process innovation, accuracy, and precision, throughput enhancement, material utilization, compact equipment development, environmental and life-cycle analysis, and predictive modeling of manufacturing processes with feature sizes less than one hundred micrometers. Papers addressing special needs in emerging areas, such as biomedical devices, drug manufacturing, water and energy, are also encouraged. Areas of interest including, but not limited to: Unit micro- and nano-manufacturing processes; Hybrid manufacturing processes combining bottom-up and top-down processes; Hybrid manufacturing processes utilizing various energy sources (optical, mechanical, electrical, solar, etc.) to achieve multi-scale features and resolution; High-throughput micro- and nano-manufacturing processes; Equipment development; Predictive modeling and simulation of materials and/or systems enabling point-of-need or scaled-up micro- and nano-manufacturing; Metrology at the micro- and nano-scales over large areas; Sensors and sensor integration; Design algorithms for multi-scale manufacturing; Life cycle analysis; Logistics and material handling related to micro- and nano-manufacturing.