Micropatterned polymer-derived ceramic catalysts and sensors

微图案聚合物衍生陶瓷催化剂和传感器

基本信息

批准号：
280588859
负责人：
Professor Dr. Aleksander Gurlo
金额：
--
依托单位：
Fraunhofer-Einrichtung für Wertstoffkreisläufe und Ressourcenstrategie IWKS
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2015
资助国家：
德国
起止时间：
2014-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/280588859?language=en
关键词：
Micropatterned polymer derived ceramic catalysts

项目摘要

Polymer-derived ceramics (PDCs) are materials which have been intensively studied in the last four decades. They describe a new class of ceramics which can be prepared without any additives by thermal handling of appropriate precursors in inert or reactive atmosphere. Since the precursors are of polymeric nature, they can be subjected to a large variety of different shaping techniques to fabricate monoliths, coatings, fibers, porous parts as well as micro parts. PDCs present exceptional properties such as oxidation and corrosion stability as well as crystallization and creep resistance up to very high temperatures. They have been also shown to possess interesting and intriguing functional properties such as optical properties, tunable electrical properties, as well as catalytic and photocatalytic activity.Within the present proposal, a fundamental study on the feasibility of polymer-derived ceramic nanocomposites to be used as micro components in devices for catalytic and sensing applications will be performed. The first main goal will be to select polymer-derived ceramic systems with catalytic and sensing properties (i.e., SiOC/MOx, SiCN/M(N), and SiCN/MSix; M = transition metal) and to assess their processability with respect to photolithographic micropatterning. Photolithography of selected polymeric precursors followed by cross-linking and ceramization will be used to generate ceramic microcomponents with tailored properties profile. A second aim which will be addressed in the frame of the present proposal is related to the integration of the target ceramic microcomponents within micro devices for catalytic and sensing purposes. Thus, three model micro devices have been defined as primary target: microstructured catalytic arrays, pellistors, and chemiresistors. The processing technology which will be developed within the present proposal will provide a facile/novel access to MEMS-type devices to be operated at high temperatures and in harsh environmental conditions.

聚合物衍生陶瓷（PDC）是过去四十年得到深入研究的材料。他们描述了一种新型陶瓷，无需任何添加剂，可以通过在惰性或反应性气氛中热处理适当的前体来制备。由于前体具有聚合性质，因此它们可以采用多种不同的成型技术来制造整体材料、涂层、纤维、多孔部件以及微型部件。 PDC 具有优异的性能，例如氧化和腐蚀稳定性以及在极高温度下的抗结晶性和抗蠕变性。它们还被证明具有有趣和有趣的功能特性，例如光学特性、可调电特性以及催化和光催化活性。在本提案中，对聚合物衍生的陶瓷纳米复合材料用作陶瓷纳米复合材料的可行性进行了基础研究。将进行催化和传感应用装置中的微型组件。第一个主要目标是选择具有催化和传感特性的聚合物衍生陶瓷系统（即 SiOC/MOx、SiCN/M(N) 和 SiCN/MSix；M = 过渡金属），并评估其在以下方面的可加工性：光刻微图案。选定的聚合物前体经过光刻，然后进行交联和陶瓷化，将用于生成具有定制特性的陶瓷微组件。本提案框架中将要解决的第二个目标涉及将目标陶瓷微型元件集成到微型设备中以用于催化和传感目的。因此，三种模型微型器件被定义为主要目标：微结构催化阵列、催化燃烧器和化学电阻器。本提案中将开发的处理技术将为在高温和恶劣环境条件下运行的 MEMS 型器件提供一种简便/新颖的方法。