Nowadays, while human requirements are extending, producing nanofibers and nanofiber based products are progressing rapidly. Nanofibers have received considerable study in recent years using various polymers and metho...Nowadays, while human requirements are extending, producing nanofibers and nanofiber based products are progressing rapidly. Nanofibers have received considerable study in recent years using various polymers and methods. PAN (Polyacrylonitryle) nanofibers have shown a great potential in producing nanofibers and nanofibre yarn as precursor polymers for making high performance carbon fiber. There is a lack of information about yarn and woven fabrics made out of nanofibers. Current research is aiming to manufacture yarn using well-known electrospinning technique and converting it to woven fabric. A continuous yarn was produced by changing production parameters and using simultaneous twisting and collecting. Values of twist and rate of fiber collecting made it possible to prepare yarn from nanofibres. Consequently, the yarns were used for producing plain weave fabric manually. Some characteristics of the yarn, such as diameter and its distribution along the yarn, specific density, thin and thick places were assessed using image processing technique. Also, characteristics of fabric appearances were investigated.展开更多
Development of miniaturized separation system consisted of microscale extraction and liquid phase separation processes has been reviewed. Various types of novel bonded stationary phases have been developed on the basi...Development of miniaturized separation system consisted of microscale extraction and liquid phase separation processes has been reviewed. Various types of novel bonded stationary phases have been developed on the basis of the systematic analysis for the retention behavior of polycyclic aromatic hydrocarbons on experimentally synthesized phases.In this review,the miniaturization of microscale sample preparation technique and the effective on-line coupling to microcolumn liquid phase separations are also described especially focusing on the approach by the author’s group.The novel use of synthetic polymer filaments as the stationary phase and extraction media in those microscale separation systems will be introduced along with the applications in gas chromatographic separation.展开更多
原子转移自由基聚合反应(Atom transfer radical polymerization,ATRP)是一种活性/可控的自由基聚合反应,是大分子设计的有效工具,利用ATRP可以合成不同成分组成和结构的高分子聚合物。近年来,ATRP还被用于各种纺织材料的功能改性。该...原子转移自由基聚合反应(Atom transfer radical polymerization,ATRP)是一种活性/可控的自由基聚合反应,是大分子设计的有效工具,利用ATRP可以合成不同成分组成和结构的高分子聚合物。近年来,ATRP还被用于各种纺织材料的功能改性。该方法不仅可以保持纺织材料原有骨架的完整性,还可以得到不包含均聚物的纯接枝共聚物,而且接枝链的长度及分子量分布均可控。但是,传统的ATRP也存在着催化体系引发效率低和容易氧化失活等问题。本文重点介绍原子转移自由基聚合方法在纺织材料改性中的应用。展开更多
文摘Nowadays, while human requirements are extending, producing nanofibers and nanofiber based products are progressing rapidly. Nanofibers have received considerable study in recent years using various polymers and methods. PAN (Polyacrylonitryle) nanofibers have shown a great potential in producing nanofibers and nanofibre yarn as precursor polymers for making high performance carbon fiber. There is a lack of information about yarn and woven fabrics made out of nanofibers. Current research is aiming to manufacture yarn using well-known electrospinning technique and converting it to woven fabric. A continuous yarn was produced by changing production parameters and using simultaneous twisting and collecting. Values of twist and rate of fiber collecting made it possible to prepare yarn from nanofibres. Consequently, the yarns were used for producing plain weave fabric manually. Some characteristics of the yarn, such as diameter and its distribution along the yarn, specific density, thin and thick places were assessed using image processing technique. Also, characteristics of fabric appearances were investigated.
文摘Development of miniaturized separation system consisted of microscale extraction and liquid phase separation processes has been reviewed. Various types of novel bonded stationary phases have been developed on the basis of the systematic analysis for the retention behavior of polycyclic aromatic hydrocarbons on experimentally synthesized phases.In this review,the miniaturization of microscale sample preparation technique and the effective on-line coupling to microcolumn liquid phase separations are also described especially focusing on the approach by the author’s group.The novel use of synthetic polymer filaments as the stationary phase and extraction media in those microscale separation systems will be introduced along with the applications in gas chromatographic separation.
基金supported by the Australian Research Council(ARC)and the Australian Wool Innovation(AWI)the support from the Common-wealth Government and the State Government of Victoria for the establishment of the Australian Future Fibres Research and Innovation Centre
文摘原子转移自由基聚合反应(Atom transfer radical polymerization,ATRP)是一种活性/可控的自由基聚合反应,是大分子设计的有效工具,利用ATRP可以合成不同成分组成和结构的高分子聚合物。近年来,ATRP还被用于各种纺织材料的功能改性。该方法不仅可以保持纺织材料原有骨架的完整性,还可以得到不包含均聚物的纯接枝共聚物,而且接枝链的长度及分子量分布均可控。但是,传统的ATRP也存在着催化体系引发效率低和容易氧化失活等问题。本文重点介绍原子转移自由基聚合方法在纺织材料改性中的应用。
