Pseudomorphic Conversion of Cellulose-based Paper to Functionalized Ceramic Papers

纤维素纸向功能化陶瓷纸的赝形转化

基本信息

项目摘要

Within the applied project, the pore space of cellulose-based paper materials is used for in-situ production of functional ceramic papers with hierarchical porosity and morphology. One of the main objectives is the pseudomorphic conversion of morphological and topological features of pulp-based paper to ceramic systems by utilization of suitable polymer-based single-source precursors (SSPs). In addition, the morphology of the cellulose paper should be equipped with in-situ grown 1D nanostructures affecting the properties of the ceramic paper such as pore structure, high temperature stability, or flexibility. For the production of ceramic papers, pulp papers are first surface-modified via condensation reactions with metal-containing preceramic polymers and, in a further thermal step, are converted into ceramic papers (perimorphoses), having a hierarchical multiscale porosity and morphology. In this case, preferentially metal-modified SiOC, Si(C)N-based ceramic papers are produced, which provide hierarchical macro/meso porosities at conversion temperatures of 700–900 °C. The modification with suitable metal-containing polymers leads to local precipitation of metal or metal silicide nanoparticles within the polymer matrix. Ceramization at higher temperatures (i.e., between 1100–1500° C) results in the in-situ formation of SiC or Si3N4-based 1D nanostructures containing functional metal or metal silicide tips (such as Fe, Ni, Ti, Fe3Si). Here, questions concerning the surface functionalization of pulp paper and the effects of the hierarchical paper pore space on the ceramization behavior of the SSPs are of great importance.In addition to the preparation of the ceramic papers, the 1D nanostructures produced in the pore space are characterized in detail by electron-optical methods. The central question here is how the microstructure, the phase structure and the topology of the ceramic papers and the functional 1D nanofibers are obtained after successful pseudomorphic transformation. Therefore, detailed material characterization is performed from the micrometer (SEM) to the nanometer scale (TEM). The overall goal is to obtain an understanding of the paper morphology across scales as well as about the resulting intrinsic nanostructures in order to generate tailored property profiles. Another important aspect is the question to what extent the intrinsic structure of the individual paper fiber is maintained (perimorphose), or what type of porosity and phase assemblage is present upon conversion within the original fiber filament. Furthermore, the question should be considered to what extent a mechanical flexibility of the produced ceramic papers can be achieved.
在应用项目中,纤维素基纸材料的孔隙空间用于原位生产具有分级孔隙率和形态的功能陶瓷纸。主要目标之一是通过利用合适的基于聚合物的单源前体(SSP),将纸浆纸的形态和拓扑特征假晶转化为陶瓷系统。此外,纤维素纸的形态应该配备有原位生长的1D纳米结构,其影响陶瓷纸的性质,例如孔结构、高温稳定性或柔性。为了生产陶瓷纸,首先通过与含金属的陶瓷前体聚合物的缩合反应对纸浆纸进行表面改性,并在进一步的热步骤中转化为具有分级多尺度孔隙率和形态的陶瓷纸(perimorphoses)。在这种情况下,优先生产金属改性的SiOC、Si(C)N基陶瓷纸,它们在700-900 °C的转化温度下提供分级的宏观/介孔孔隙率。用合适的含金属聚合物进行改性导致金属或金属硅化物纳米颗粒在聚合物基质内局部沉淀。在较高温度下的陶瓷化(即,在1100-1500° C之间)的热处理导致原位形成含有功能性金属或金属硅化物尖端(如Fe、Ni、Ti、Fe 3Si)的SiC或Si 3 N4基1D纳米结构。在这里,有关的纸浆纸的表面功能化和分层的纸张孔隙空间上的陶瓷化行为的SSP的影响的问题是非常重要的。除了陶瓷纸的制备,在孔隙空间中产生的一维纳米结构的特征在于详细的电子光学方法。这里的中心问题是如何获得的微观结构,相结构和拓扑结构的陶瓷纸和功能的一维纳米纤维后,成功的赝晶转变。因此,从微米(SEM)到纳米尺度(TEM)进行详细的材料表征。总体目标是获得跨尺度的纸张形态的理解,以及关于所得到的内在纳米结构,以生成定制的属性配置文件。另一个重要方面是单个纸纤维的固有结构被保持到何种程度(周晶)的问题,或者在原始纤维长丝内转化时存在何种类型的孔隙率和相组合。此外,应考虑所生产的陶瓷纸的机械柔性可达到何种程度的问题。

项目成果

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Professor Dr. Hans-Joachim Kleebe其他文献

Professor Dr. Hans-Joachim Kleebe的其他文献

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{{ truncateString('Professor Dr. Hans-Joachim Kleebe', 18)}}的其他基金

Formation mechanisms of calcium phosphate plaques and attached calcium oxalate kidney stones
磷酸钙斑块及附着草酸钙肾结石的形成机制
  • 批准号:
    415094771
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Design of Novel Buffer Layers for Excellent Performance UHTCs; Investigation of Diffusion Mechanisms
新型缓冲层设计,实现卓越性能的 UHTC;
  • 批准号:
    323778385
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Mechanically tunable conductivity in piezoelectric semiconductors
压电半导体中的机械可调电导率
  • 批准号:
    317658731
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Hydrothermal conversion of porous Ca carbonate biominerals into antibiotic and antiosteoporotic Ca phosphate bone implant materials containing Mg, Sr, Zn and Ag ions
多孔碳酸钙生物矿物水热转化为含镁、锶、锌和银离子的抗生素和抗骨质疏松磷酸钙骨植入材料
  • 批准号:
    261597544
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Antibacterial Properties of Ag-modified Ca-Phosphate Scaffolds for Bone Implant Applications
用于骨植入应用的银修饰磷酸钙支架的抗菌性能
  • 批准号:
    233288654
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Development of B6O-based materials for wear applications
开发用于磨损应用的 B6O 基材料
  • 批准号:
    231419978
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Precipitation mechanisms of Ca-oxalate in the presence of Ca-phosphates and osteopontin molecules related to kidney stone formation
磷酸钙和骨桥蛋白分子存在下草酸钙与肾结石形成相关的沉淀机制
  • 批准号:
    194435755
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Nanostructure and Calorimetry of Amorphous SiCN and SiBCN Ceramics
非晶 SiCN 和 SiBCN 陶瓷的纳米结构和量热学
  • 批准号:
    131173649
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Investigation of strengthened hydroxyapatite/ß-tricalcium phosphate composites with tailored porosity
具有定制孔隙率的强化羟基磷灰石/磷酸三钙复合材料的研究
  • 批准号:
    101394211
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Synthese und Hochtemperaturstabilität amorpher Keramiken im System Si-B-C-N aus polymeren Vorstufen und deren Anwendung für die Kohlenstofffaserbeschichtung über Fluid-Coating-Verfahren
聚合物前驱体 Si-B-C-N 体系非晶陶瓷的合成和高温稳定性及其在流体涂层碳纤维涂层中的应用
  • 批准号:
    5393667
  • 财政年份:
    1997
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes

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Machine learning-driven preparation of high-performance bio-derived carbon catalyst for conversion of cellulose
机器学习驱动制备用于纤维素转化的高性能生物衍生碳催化剂
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森林资源干法粉碎转化纤维素纳米纤维促进区域振兴研究
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纤维素电化学氧化分解的精确分析及其在能量转换装置中的应用
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Methods and Processes Starting from Pyrolysis for Fast Conversion of Cellulose to Valuable Chemicals
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将纤维素直接转化为化学品的环境友好型系统
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Development of catalytic process for the conversion of woody biomass (cellulose) to the raw materials of polymers
开发木质生物质(纤维素)转化为聚合物原料的催化工艺
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Conversion of Cellulose into bio-fuels of next generation by acidic ionic liquids-sillica gel haybrid catalysis
酸性离子液体-硅胶 haybrid 催化将纤维素转化为下一代生物燃料
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