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"Aero-Fib" - Investigation of synthesis, characterization and spinning of highly porous aero-cellulosic fibers for applications in technical textiles

“Aero-Fib” - 研究用于产业用纺织品的高孔隙率航空纤维素纤维的合成、表征和纺丝

基本信息

批准号：
179080540
负责人：
Professor Dr.-Ing. Thomas Gries
金额：
--
依托单位：
DWI - Leibniz-Institut für Interaktive Materialien e.V.
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/179080540?language=en
关键词：
Aero Fib Investigation synthesis characterization

项目摘要

Spinning non-porous fibers from cellulose dissolved in ionic liquids has recently aroused the interest of fundamental and industrial research. It has been demonstrated that the production of highly porous and mechanically strong bulk materials from cellulosic aerogels using the salt-hydrate melt route is feasible. Yet, neither have ionic liquids been used for the production of highly porous fibers, nor has the salt-hydrate melt route been investigated systematically for fiber production.The two procedures for dissolution of cellulose – using salt-hydrate melts or ionic liquids – will be investigated with respect to the production and the properties of aero-cellulosic fibers. The developed porous fibers are then processed into adequate textiles, which will be analyzed subsequently. Hence a new fibrous material for filtration, superabsorbers in hygiene products and/or composites has been highlighted. A high level of porosity and mechanical strength is a combination that enhances liquid and particle absorption, thermal insulation and lightweight performance. Preliminary experiments of ITA and DLR have already demonstrated the feasibility of this approach.The investigation will start with the production of cellulosic aerogels by preparing solutions of salt-hydrate melts or ionic liquids with varying cellulose concentrations which subsequently will be dried as bulk materials. The properties of the aerogels (e.g. viscosity, concentration) and the dried aero-cellulosic monoliths (e.g. mechanical strength, porosity) will result in a selection of recipes for fiber spinning trials. Subsequently, an application-specific spinning equipment for processing the recipes will be developed and implemented. The selected recipes will be tested on spinnability. Spinnable recipes will be processed into fibers under varying process parameters (e.g. drawing speed, spin bath temperature) and dried into aero-cellulosic fibers. The properties of fibers (e.g. mechanical strength, morphology) will be analyzed to generate possibilities for textile applications, mainly for filtration or hygiene products.The second stage of this proposal investigates the capability of producing different textile structures (e.g. nonwoven, knitting or woven) with aero-cellulosic fibers. Additionally, the possibility to improve the aero-cellulosic fibers mechanically (e.g. using crosslinking agents) can expand the application of these fibers into the area of composites.The project is expected to provide insights on how to control cellulose arrangement in aerogels and to exhibit the potential of this material for fibers and textiles.

用溶解在离子液体中的纤维素纺丝无孔纤维最近引起了基础和工业研究的兴趣。事实证明，使用盐-水合物熔融路线从纤维素气凝胶生产高度多孔且机械强度高的散装材料是可行的。然而，离子液体既没有被用于生产高多孔纤维，也没有系统地研究水合物熔融路线用于纤维生产。纤维素溶解的两种程序——使用水合物熔融物或离子液体——将针对航空纤维素纤维的生产和性能进行研究。然后将开发的多孔纤维加工成足够的纺织品，随后进行分析。因此，用于过滤的新型纤维材料、卫生产品和/或复合材料中的超级吸收剂已受到关注。高水平的孔隙率和机械强度的结合可以增强液体和颗粒的吸收、隔热和轻质性能。 ITA和DLR的初步实验已经证明了这种方法的可行性。研究将从制备纤维素气凝胶开始，通过制备具有不同纤维素浓度的盐水合物熔体或离子液体溶液，随后将其干燥为散装材料。气凝胶的特性（例如粘度、浓度）和干燥的航空纤维素整体材料（例如机械强度、孔隙率）将导致纤维纺丝试验配方的选择。随后，将开发和实施用于处理配方的专用纺丝设备。所选配方将进行可纺性测试。可纺配方将在不同的工艺参数（例如拉伸速度、纺丝浴温度）下加工成纤维，并干燥成航空纤维素纤维。将分析纤维的特性（例如机械强度、形态），以产生纺织应用的可能性，主要用于过滤或卫生产品。该提案的第二阶段研究用航空纤维素纤维生产不同纺织结构（例如非织造、针织或机织）的能力。此外，从机械角度改进航空纤维素纤维（例如使用交联剂）的可能性可以将这些纤维的应用扩展到复合材料领域。该项目预计将提供有关如何控制气凝胶中纤维素排列的见解，并展示这种材料在纤维和纺织品方面的潜力。