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Stereolithography: Enabling Polymer Network and Multi-Scale Structure Control

立体光刻：实现聚合物网络和多尺度结构控制

基本信息

批准号：
2007909
负责人：
Catalin Picu
金额：
$ 53.14万
依托单位：
Rensselaer Polytechnic Institute
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-01-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2007909&HistoricalAwards=false
关键词：
Stereolithography Enabling Polymer Network Multi

项目摘要

This award supports fundamental research that integrates material chemistry and mechanics to define a technology which can lead to advanced manufacturing of 3D printed thermosets with enhanced mechanical properties. Thermoset structures containing stiff and soft domains that mimic the hierarchical structure of bone, nacre, bamboo and pearlite steels will be developed by using stereolithography 3D printing in conjunction with phase separation. The experimental work will be guided by modeling to optimize the network structure and the multiscale architecture of the material, in order to achieve strength and toughness of the additive manufactured (AM) parts superior to those of the structurally homogeneous thermosets used today. Polymer nanocomposite AM parts are increasingly important for applications in dental, biomedical, wearable electronics, aerospace, and automotive industries. Therefore, results from this research will benefit the U.S. economy and society. This project integrates research with an education plan, which encompasses course development, education of graduate students, integration of undergraduate students in research, outreach to K-12 and the promotion of STEM. The objective of this research is to innovate the photopolymerization 3D printing technique called stereolithography (SLA) to allow for the production of thermosets with network structure and architecture modulated on multiple scales. The project aims to develop material design rules for heterogeneous thermosets and to establish new SLA methods by combining photo-crosslinking with phase separation. This activity will (i) develop SLA as an additive manufacturing method for thermosets with structure controlled on multiple length scales, including on scales finer than the printing resolution, and (ii) develop the concept and the methods to design the multiscale structure so as to enhance its toughness without compromising the strength and stiffness of the thermoset. This will be achieved by integrating modeling and experimentation. The developed technologies will be applicable to other polymeric systems to control these and other sets of properties, such as the thermal and electrical conductivities. This research will also provide education in advanced manufacturing, materials modeling and polymer research to graduate and undergraduate students, while dissemination and outreach to K-12 will increase the impact of the project activities.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项支持将材料化学和力学相结合的基础研究，以定义一种可以导致具有增强机械性能的3D打印热固性的先进制造技术。通过使用立体光刻3D打印与相分离相结合，将开发出包含硬磁区和软磁区的热固性结构，这些结构模仿骨、珍珠层、竹子和珠光体钢的分层结构。实验工作将通过建模来指导，以优化材料的网络结构和多尺度结构，以便获得比目前使用的结构均匀的热固性更好的添加剂制造(AM)部件的强度和韧性。聚合物纳米复合材料AM部件在牙科、生物医学、可穿戴电子产品、航空航天和汽车工业中的应用日益重要。因此，这项研究的结果将有利于美国的经济和社会。该项目将研究与教育计划结合起来，其中包括课程开发、研究生教育、本科生融入研究、与K-12的联系以及促进STEM。这项研究的目的是创新被称为立体平版印刷(SLA)的光聚合3D打印技术，以允许生产具有多个尺度的网络结构和体系结构的热固性树脂。该项目旨在制定异质热固性材料的设计规则，并通过将光交联与相分离相结合来建立新的SLA方法。这项活动将(I)开发SLA作为一种添加剂制造方法，用于在多种长度尺度上控制结构的热固性，包括在比印刷分辨率更精细的尺度上控制结构，以及(Ii)开发设计多尺度结构的概念和方法，以便在不影响热固性的强度和硬度的情况下增强其韧性。这将通过将建模和实验相结合来实现。开发的技术将适用于其他聚合物体系，以控制这些和其他组性质，如热导率和电导率。这项研究还将为研究生和本科生提供先进制造、材料建模和聚合物研究方面的教育，而对K-12的传播和推广将增加项目活动的影响。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。