NanoThermal Analyzer (NanoTA) Module for Atomic Force Microscopy (AFM) for Effective Characterization and Assessment of the Properties and Long-Term Performance of Novel FRP Materials

用于原子力显微镜 (AFM) 的纳米热分析仪 (NanoTA) 模块，可有效表征和评估新型 FRP 材料的特性和长期性能

• 批准号: RTI-2020-00476
• 负责人: Benmokrane, Brahim
• 金额: $ 10.9万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693671
• 关键词: NanoThermal; Analyzer; NanoTA; Module; Atomic

Fiber reinforced polymers (FRPs) are used increasingly as concrete reinforcement as a cost effective alternative to steel bars. Given their corrosion resistance, light weight, and high strength, FRP bars have a 25year history in Canada in infrastructure such as bridge decks, parking garages, and continuous pavements. The lack of appropriate data about the long-term durability poses a major obstacle to broader acceptance and mass implementation of FRP bars. Moreover, the applicants are conducting new research on the development of FRP ecomaterials based on natural fibers and biosourced resins. These activities require detailing research work involving the characterization of fibersurface chemical treatments, and fiber/resin interface analysis. To address these concerns, the applicants will conduct research investigating the effects of various environmental/load/synergetic parameters on the long-term performance of new materials and FRP products incorporating a new class of fibers, resin systems with low diffusion, natural fibers, and control and conditioned (environmental exposure, loaded) FRP samples to assess degradation mechanisms (fiber, matrix, and interface dominated). In particular, matrix & fibermatrix interface degradation will be studied by Nano Thermal Analyzer (NanoTA) Module coupled with Atomic Force Microscope (AFM) technology. Moreover, projects involving the use of natural fibers or biosourced resins in ecocomposites will strongly benefit from this equipment for characterizing resin surface modification, surface microstructure and properties of reinforcing materials and interphase/interface behaviour of materials subjected to moist environments and aggressive media. Moreover, our new projects (Tier1 and Tier2 CRC of the coapplicants) involving natural fibers in ecocomposites will strongly benefit from this equipment for characterizing fibersurface modification, and fiber/resin chemical resistance in aggressive media. The proposed research will (1) provide new knowledge and scientific insights into the factors controlling the chemical resistance and durability of FRPs containing a new class of fibers and resins, modified natural fibers, and biosourced resins or nanomaterials such as nanocellulose or carbon nanotubes; (2) provide reliable models to predict the service life based on short-term laboratory aging tests and field test data from inservice structures; (3) validate natural fiber surface treatments and their effect on the behavior and durability of FRP ecocomposites; (4) yield new durability guidelines; and (5) influence upcoming codes and materials specifications nationally and internationally. 22 HQP (16 PhD and 2 MASc students, 4 postdoctoral fellows and 2 technicians) will receive advanced training on FRP composites and nanomaterials on this equipment. It is worth mentioning that the requested equipment will be used in accordance with NSERC's Statements on EDI.

纤维增强聚合物 (FRP) 越来越多地用作混凝土增强材料，作为钢筋的经济高效替代品。由于其耐腐蚀、重量轻、强度高，FRP筋在加拿大用于桥面、停车场和连续路面等基础设施方面已有25年的历史。缺乏有关长期耐久性的适当数据对 FRP 筋的更广泛接受和大规模应用构成了主要障碍。此外，申请人正在对基于天然纤维和生物源树脂的FRP生态材料的开发进行新的研究。这些活动需要详细的研究工作，涉及纤维表面化学处理的表征以及纤维/树脂界面分析。 为了解决这些问题，申请人将开展研究，调查各种环境/负载/协同参数对新材料和 FRP 产品长期性能的影响，这些新材料和 FRP 产品包含新型纤维、低扩散树脂系统、天然纤维以及控制和调节（环境暴露、负载）FRP 样品，以评估降解机制（纤维、基质和界面主导）。特别是，基质和纤维基质界面退化将通过纳米热分析仪（NanoTA）模块与原子力显微镜（AFM）技术相结合进行研究。此外，涉及在生态复合材料中使用天然纤维或生物来源树脂的项目将极大地受益于该设备，用于表征树脂表面改性、增强材料的表面微观结构和性能以及潮湿环境和腐蚀性介质下材料的相间/界面行为。此外，我们涉及生态复合材料中的天然纤维的新项目（共同申请人的 Tier1 和 Tier2 CRC）将极大地受益于该设备，用于表征纤维表面改性以及侵蚀性介质中纤维/树脂的耐化学性。 拟议的研究将（1）为控制含有新型纤维和树脂、改性天然纤维以及生物源树脂或纳米材料（例如纳米纤维素或碳纳米管）的玻璃钢的耐化学性和耐久性的因素提供新的知识和科学见解； （2）根据短期实验室老化试验和在役结构的现场试验数据，提供可靠的模型来预测使用寿命； (3) 验证天然纤维表面处理及其对 FRP 生态复合材料性能和耐久性的影响； (4) 产生新的耐久性准则； (5) 影响国内和国际即将出台的规范和材料规范。 22名总部人员（16名博士生、2名硕士生、4名博士后和2名技术人员）将在该设备上接受FRP复合材料和纳米材料的高级培训。值得一提的是，所请求的设备将按照 NSERC 的 EDI 声明使用。