GOALI: Additive Manufacturing of High Performance Elastomers via Vat Photopolymerization of Aqueous Polymer Dispersions
GOALI:通过水性聚合物分散体的还原光聚合增材制造高性能弹性体
基本信息
- 批准号:1762712
- 负责人:
- 金额:$ 43.98万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-06-15 至 2022-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Additive manufacturing processes, often referred to as 3D Printing, have shown promise as a means for fabricating parts featuring complex geometries that can be tailored to an individual customer and application. Vat Photopolymerization is one method of additive manufacturing that offers superior feature resolution, accuracy, and surface finish. However, despite these advantages relative to other processes, Vat Photopolymerization has seen limited industrial adoption for fabricating end-use products primarily due to the limited diversity and quality of its processable materials. The narrow range of suitable materials can be attributed to process-imposed constraints. For example, the resins must have a low viscosity (flow easily) to aid part recoating prior to printing the next layer. This prevents the use of polymers with high molecular weight, which limits the printed material's strength and elasticity. To overcome this limitation, this Grant Opportunity for Academic Liaison with Industry (GOALI) Program research project plans to use resins that consist of high-molecular weight polymer 'particles' suspended in a low viscosity medium, e.g. water and solvent. Successfully understanding the optimal composition and printability of such resins will enable advanced manufacturing capabilities to realize the printing of rubber and latex parts. This can be beneficial to key US based automotive and aerospace industries by facilitating the printing of tires, gaskets, and bushings. As this is an industry-university collaborative project, the graduate students involved will gain an understanding of industrial challenges and drivers, thus increasing their preparedness for the future workforce. Additional educational opportunities will be provided for undergraduate students and underrepresented minorities to further broaden engagement in advanced manufacturing and material science topics. The research objectives of this GOALI program award are to (i) understand requirements for forming stable aqueous polymer dispersions, (ii) understand how characteristics of dispersions influence green body strength and photocuring kinetics, (iii) model the layerwise photocuring behavior of dispersions, and (iv) map the processable material design space. The research will test three hypotheses based on preliminary experiments: (i) improvement in mechanical properties is due to the coalescence of the dispersed polymer particles and formation of a high molecular weight, entangled network throughout the scaffold upon drying, (ii) the observed sharp increase in strength seen at low strains is attributable to the rigid scaffold created in the continuous, aqueous phase during printing, and (iii) existing Vat Polymerization models for relating scattering phenomena with exposure and cure depth must be adapted to account for the dispersions' dynamically changing refractive index. This research will result in (i) fundamental understanding of structure-property-process relationships of Vat Polymerization dispersions, (ii) a model of the photocuring behavior of polymeric dispersions that accounts for dynamically changing refractive index, and (iii) a series of novel Vat Polymerization elastomers with tunable mechanical properties.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.
增材制造工艺(通常称为3D打印)已显示出作为制造具有复杂几何形状的零件的一种手段的前景,这些零件可以根据个别客户和应用进行定制。还原光聚合是增材制造的一种方法,其提供上级特征分辨率、精度和表面光洁度。然而,尽管相对于其他工艺具有这些优势,但由于其可加工材料的多样性和质量有限,还原光聚合在制造最终用途产品方面的工业应用有限。合适材料的范围狭窄可归因于工艺施加的限制。例如,树脂必须具有低粘度(易于流动),以在打印下一层之前帮助部件重涂。这就阻止了高分子量聚合物的使用,从而限制了印刷材料的强度和弹性。为了克服这一限制,该学术与工业联络资助机会(GOALI)计划研究项目计划使用由悬浮在低粘度介质(例如水和溶剂)中的高分子量聚合物“颗粒”组成的树脂。成功地理解这种树脂的最佳组成和印刷适性将使先进的制造能力能够实现橡胶和乳胶部件的印刷。这可以通过促进轮胎、垫圈和衬套的印刷而有益于美国的汽车和航空航天工业。 由于这是一个产学合作项目,参与的研究生将了解工业挑战和驱动因素,从而为未来的劳动力做好准备。将为本科生和代表性不足的少数民族提供额外的教育机会,以进一步扩大对先进制造和材料科学主题的参与。该GOALI计划奖的研究目标是(i)了解形成稳定的水性聚合物分散体的要求,(ii)了解分散体的特性如何影响绿色体强度和光固化动力学,(iii)模拟分散体的分层光固化行为,以及(iv)绘制可加工材料设计空间。该研究将基于初步实验测试三个假设:(i)机械性能的改善是由于分散的聚合物颗粒的聚结和在干燥时在整个支架上形成高分子量的缠结网络,(ii)在低应变下观察到的强度的急剧增加可归因于在打印期间在连续的水相中产生的刚性支架,和(iii)现有的用于将散射现象与曝光和固化深度相关联的还原聚合模型必须适于解释分散体的动态变化的折射率。这项研究将导致(i)对还原聚合分散体的结构-性能-工艺关系的基本理解,(ii)考虑动态变化的折射率的聚合物分散体的光固化行为的模型,以及(iii)一系列具有可调机械性能的新型还原聚合弹性体。该奖项反映了NSF的法定使命,并通过使用基金会的学术价值和更广泛的影响审查标准。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Polymer-inorganic hybrid colloids for ultraviolet-assisted direct ink write of polymer nanocomposites
- DOI:10.1016/j.addma.2020.101393
- 发表时间:2020-10
- 期刊:
- 影响因子:11
- 作者:Philip J. Scott;D. Rau;J. Wen;M. Nguyen;Christopher R. Kasprzak;C. Williams;T. Long
- 通讯作者:Philip J. Scott;D. Rau;J. Wen;M. Nguyen;Christopher R. Kasprzak;C. Williams;T. Long
3D Printing Latex: A Route to Complex Geometries of High Molecular Weight Polymers
3D 打印乳胶:高分子量聚合物复杂几何形状的途径
- DOI:10.1021/acsami.9b19986
- 发表时间:2020
- 期刊:
- 影响因子:9.5
- 作者:Scott, Philip J.;Meenakshisundaram, Viswanath;Hegde, Maruti;Kasprzak, Christopher R.;Winkler, Christopher R.;Feller, Keyton D.;Williams, Christopher B.;Long, Timothy E.
- 通讯作者:Long, Timothy E.
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Christopher Williams其他文献
Towards Stratified Space Learning: Linearly Embedded Graphs
迈向分层空间学习:线性嵌入图
- DOI:
10.3934/fods.2021026 - 发表时间:
2021 - 期刊:
- 影响因子:0
- 作者:
Yossi Bokor Bleile;Katharine Turner;Christopher Williams - 通讯作者:
Christopher Williams
Production of Sustainable Aromatics from Biorenewable Furans
- DOI:
10.7275/f55e-b536 - 发表时间:
2014 - 期刊:
- 影响因子:0
- 作者:
Christopher Williams - 通讯作者:
Christopher Williams
Experiential Learning and Innovation in Offshore Outsourcing Transitions
离岸外包转型中的体验式学习和创新
- DOI:
10.1108/s1571-502720140000027005 - 发表时间:
2014 - 期刊:
- 影响因子:0
- 作者:
Christopher Williams;Maya Kumar - 通讯作者:
Maya Kumar
Approximations to the Fisher Information Metric of Deep Generative Models for Out-Of-Distribution Detection
用于分布外检测的深度生成模型的 Fisher 信息度量的近似
- DOI:
10.48550/arxiv.2403.01485 - 发表时间:
2024 - 期刊:
- 影响因子:0
- 作者:
Sam Dauncey;Chris Holmes;Christopher Williams;Fabian Falck - 通讯作者:
Fabian Falck
Innovativeness in the Professional Services Industry: A Practice Level Analysis
专业服务行业的创新:实践水平分析
- DOI:
- 发表时间:
2021 - 期刊:
- 影响因子:0
- 作者:
Christopher Williams;S. Triest - 通讯作者:
S. Triest
Christopher Williams的其他文献
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{{ truncateString('Christopher Williams', 18)}}的其他基金
Constructions and properties of p-adic L-functions for GL(n)
GL(n) 的 p 进 L 函数的构造和性质
- 批准号:
EP/T001615/2 - 财政年份:2022
- 资助金额:
$ 43.98万 - 项目类别:
Fellowship
I-Corps: Multi-axis Additive Manufacturing Process for Performance-Optimized Composites
I-Corps:性能优化复合材料的多轴增材制造工艺
- 批准号:
2140020 - 财政年份:2021
- 资助金额:
$ 43.98万 - 项目类别:
Standard Grant
REU Site: CO2 Chemical Engineering: Opportunities and Challenges
REU 网站:CO2 化学工程:机遇与挑战
- 批准号:
2050956 - 财政年份:2021
- 资助金额:
$ 43.98万 - 项目类别:
Standard Grant
CPS: TTP Option: Medium: Collaborative Research: Cyber-Physical System Integrity and Security with Impedance Signatures
CPS:TTP 选项:中:协作研究:具有阻抗签名的网络物理系统完整性和安全性
- 批准号:
1932213 - 财政年份:2019
- 资助金额:
$ 43.98万 - 项目类别:
Continuing Grant
Constructions and properties of p-adic L-functions for GL(n)
GL(n) 的 p 进 L 函数的构造和性质
- 批准号:
EP/T001615/1 - 财政年份:2019
- 资助金额:
$ 43.98万 - 项目类别:
Fellowship
I-Corps: High-temperature 3D Printer for High-Performance Polymers
I-Corps:用于高性能聚合物的高温 3D 打印机
- 批准号:
1934465 - 财政年份:2019
- 资助金额:
$ 43.98万 - 项目类别:
Standard Grant
Computational Design of Graphene-Based Materials for Challenging Nuclear Decommissioning Applications
具有挑战性的核退役应用的石墨烯基材料的计算设计
- 批准号:
EP/R033366/1 - 财政年份:2018
- 资助金额:
$ 43.98万 - 项目类别:
Fellowship
GOALI/Collaborative Research: Topology Optimization for Additively Manufactured Metal Castings
GOALI/合作研究:增材制造金属铸件的拓扑优化
- 批准号:
1462089 - 财政年份:2015
- 资助金额:
$ 43.98万 - 项目类别:
Standard Grant
UNS: Selective Catalytic Conversion of Syngas-Derived Dimethyl Oxalate to Ethylene Glycol: Mechanistic Insights from In-Situ Surface Vibrational Spectroscopy
UNS:合成气衍生的草酸二甲酯选择性催化转化为乙二醇:来自原位表面振动光谱的机理见解
- 批准号:
1510157 - 财政年份:2015
- 资助金额:
$ 43.98万 - 项目类别:
Standard Grant
EAGER/Collaborative Research/Cybermanufacturing: Just Make It: Integrating Cybermanufacturing into Design Studios to Enable Innovation
EAGER/协作研究/网络制造:Just Make It:将网络制造集成到设计工作室以实现创新
- 批准号:
1546985 - 财政年份:2015
- 资助金额:
$ 43.98万 - 项目类别:
Standard Grant
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