A study of the developing strategy of Xiamen Xianglu chemical fiber Co., Ltd

投产于1995年的厦门翔鹭化纤股份有限公司，是中国化纤行业内最大的外商投资企业，历经了中国化纤工业从起步、发展到剧烈竞争的整个过程。企业如何在竞争中生存并发展，本文希望能借助相关管理理论，探寻翔鹭化纤持续发展的竞争战略。本文依据战略分析、战略选择、战略实施的战略管理过程基本模型，首先简要介绍了翔鹭化纤基本概况，然后对其外部环境（宏观环境、行业概况、产业环境）和内部资源能力进行层层深入分析，进而建立外部因素评价（EFE）矩阵和内部因素评价（IFE）矩阵；尔后再以EFE和IFE矩阵为基础，建立SWOT矩阵得出各种备选战略，从而分析得出企业的总体发展目标与发展战略，最后以总体发展战略为基础，分解制定...Xiamen Xianglu Chemical Fiber Co., Ltd founded in 1995 is the largest foreign-invested chemical fiber enterprise, which has experienced the whole process of starting up, development and fierce competition. How do enterprises survive and develop in the competition? This article aims to seek a competition strategy for sustainable development of Xiamen Xianglu Chemical Fiber Co., Ltd. with relevant m...学位：工商管理硕士院系专业：管理学院工商管理教育中心（MBA中心）_工商管理硕士(MBA)学号：20021509

专题:软物质研究进展

编者按在物理学研究的早期历史上,很多享誉世界的大科学家,如爱因斯坦、朗缪尔、弗洛里等,都对软物质物理的发展做出过开创性贡献.自de Gennes 1991年正式提出"软物质"概念以来,软物质物理学发展更为迅猛,不仅极大地丰富了物理学的研究对象,还对物理学基础研究,尤其是与复杂体系、非平衡现象(如生命现象)密切相关的物理学提出了重大挑战.作为物理学与数学、化学、生物学、工程等学科的重要交叉点,软物质物理的研究无疑对推动多学科的交集协同发展有着极其重

专题:软物质研究进展

编者按在物理学研究的早期历史上,很多享誉世界的大科学家如爱因斯坦、朗缪尔、弗洛里等,都对软物质物理的发展做出过开创性贡献.自de Gennes 1991年正式提出"软物质"概念以来,软物质物理学发展更为迅猛,不仅极大地丰富了物理学的研究对象,还对物理学基础研究,尤其是与复杂体系、非平衡现象(如生命现象)密切相关的物理学提出了重大挑战.作为物理学与数学、化学、生物学、工程等学科的重要交叉点,软物质物理的研究无疑对推动多学科的交集协同发展有着极其重要的作用

Preparation of Crack-free Inverse-opal Films by Template/Matrix Co-assembly

近年来,由于在光学、电学和生化等领域具有广泛的潜在应用,有序多孔反蛋白石结构薄膜的研究引起了人们的广泛关注.但是其在制备过程中常常会形成一些无法; 控制的缺陷,限制了这类材料的普及和实际应用.通过使用两种基质前驱体(正硅酸乙酯或丝素蛋白)与胶体小球混合共组装,探究了二元体系共组装法制备无裂痕; 反蛋白石结构薄膜的可行性.并用扫描电镜和可见光谱对薄膜结构进行了表征.结果表明,对于正硅酸乙酯体系,在不影响胶体小球有序排列的条件下,正硅酸乙酯; 在小球间的空隙中发生溶胶凝胶转变,与微球共同组装成有序致密的整体,去除微球模板后,可以得到大规模(>200; mum)无缺陷有序的反蛋白石结构薄膜.而对于大分子丝素蛋白体系,由于它和胶体小球有较强的相互作用力,会抑制胶体小球的有序组装,导致无法形成有序结; 构薄膜.对两种二元共组装体系进行了实验探索,实验结果不仅有助于人们了解共组装方式的适用范围,而且为设计和制备无缺陷反蛋白石薄膜提供了新的途径.Recently, there has been a significant interest in utilizing well-ordered, porous inverse-opal films for applications in optical, electronic and (bio) chemical fields. However, uncontrolled defects are always formed during their preparation process, which limit their practical applications. In this work, we examine the feasibility of using template/matrix co-assembly strategies to fabricate crack-free inverse opal thin films. Polystyrene spheres (PS) are chosen as a colloidal template, and two matrix precursors [tetraethoxysilane (TEOS) precursor and regenerated silk fibroin solution] are used for the current study. Our scanning electron microscope (SEM) and optical spectrum results show that, for the TEOS-based system, the resulting silica gel due to the sol-gel transition of TEOS can effectively fill the gap between particles, but cannot affect the self-assembly of PS colloidal particles. After selective removal of the PS template, centimeter-scale crack-free and well-ordered inverse opal films can be obtained. In addition, for a constant concentration of TEOS, the film thickness and order degree of structure can be simply tuned by adjusting the concentrations of colloidal spheres. In comparison with indirect approach through template self-assembly and liquid infiltration, such a co-assembly approach can effectively minimize the associated cracking and avoid the need for matrix infiltration into the preassembled colloidal spheres. On the other hand, macro-molecule silk fibroin has a relatively strong interaction with PS colloidal particles, which is demonstrated by SEM and confocal images. Due to their interaction, silk fibroin molecules are preferably adsorbed on the surface of PS spheres, which can restrain the self-assembly of colloidal particles. As a result, it cannot form well-ordered silk film based on such co-assembly strategy. That is to say, the co-assembly approach is not suitable for systems that matrices have strong interactions with templates. These findings pave the way to use the template/matrix co-assembly strategy for rationally designing and developing crack-free inverse opal films and to apply such well-ordered and porous materials in a variety of fields.National Natural Science Foundation of China [21401154, U1405226]; 111; Project [B16029]; Natural Science Foundation of Guangdong Province; [2014A030310005]; Fundamental Research Funds for the Central; Universities of China [20720170011

Experimental modelling of single-particle dynamic processes in crystallization by controlled colloidal assembly

National Natural Science Foundation of China [11374218]In the last few decades, the controlled colloidal assembly was adopted as a new modelling technology for the study of the crystallization mechanism. In colloidal systems, the movement of particles is slow enough to follow and the particle dynamics can be monitored at the single-particle level using normal optical microscopes. So far, the studies of colloidal crystallization have produced a number of insights, which have significantly improved our understanding of crystallization. In this review, we summarize the recent advances in understanding the mechanism of crystallization, which were achieved using colloidal model systems, i.e., the kinetics of nucleation, growth and defect formation. Such model systems allow us to not only visualize some "atomic'' details of nucleation and surface processes of crystallization, but also quantify previous models to such an extent that has never been achieved before by other approaches. In the case of nucleation, the quantitative observation of the kinetic process was made at the single-particle level; the results include the ideal case and the deviations from classical theories. The deviations include multi-step crystallization, supersaturation-driven structural mismatch nucleation, defect creation and migration kinetics, surface roughening, etc. It can be foreseen that this approach will become a powerful tool to study the fundamental process of crystallization and other phase transitions

蚕丝和蜘蛛丝多级结构对力学性能的影响

家蚕丝和蜘蛛丝具有力学性能优异、生物可相容和生物可降解等诸多优点。本文阐述了蚕丝和蜘蛛丝的一级结构、二级结构、β-折叠晶体网络(纳米纤维)结构及其形成过程,综述了丝蛋白亲疏水域、分子量和晶体网络结构对力学性能的影响。其中,晶体网络结构的强度是影响力学性能的关键,由拓扑结构、相关长度、取向度和连接(或者相互作用的强度)这4个因素决定。本文为力学性能的控制及提高提供了指导。高等学校学科创新引智计划(B16029);;国家自然科学基金(51773171,U1405226);;福建省科技厅自然科学基金(2017J06019);;中央高校基本科研业务费专项资金(20720160088,20720150218

Functionalization of Silkworm Silk Materials in Optics

家蚕蚕丝是一种天然的蛋白质纤维,蚕丝及其衍生物(凝胶、蚕丝薄膜和海绵等)具有独特的力学性能、良好的生物相容性和生物降解性,已经被应用在纺织、生物医学等领域。最近,利用蚕丝独特的性质制备光学功能化蚕丝吸引了研究者的兴趣。基于对蚕丝的丝胶和丝素结构组成的总结,介绍了目前蚕丝结构的相关研究进展,综述了近年来对光学功能化蚕丝的研究,具体包括光学功能化蚕丝的重要种类、制备和应用。重点介绍了荧光性功能蚕丝基因工程、喂食法和复合等制备方法,该种材料用于生物支架成像、药物缓释载体和光学器件等领域。总结了利用生物仿生技术制备具有光子晶体结构色的蚕丝材料,这为化妆品,变色服饰和生物光控器件开辟了新方向;此外,蚕丝材料还可以应用于非线性光学领域,如光限幅和激光防护。As a kind of nature protein,silkworm silk and its derivatives( gels,silk fibroin foams and films) possess the unique mechanical properties,biocompatibility and biodegradability,which have been applied to textile and biomedical industry.Recently,there is a growing interest in introducing optical functionalities into silk.Based on the structure of sericin and fibroin,functionalization of silk was summarized in optics,specifically including the important species,preparation and application of fluorescent silk.This paper highlighted that the fluorescent silk can be produced by genetic engineering,feeding,and compositing etc.,which can be applied in scaffold imaging,drug delivery,and optical devices.In addition,this paper reviewed the fabrication of silk fabrics with photonic crystals structure colors using biomimetic techniques,which opens up a new direction of cometic,color dress,various devices and biological optical devices.At last,silk materials can also be applied in nonlinear optics,such as optical limiting and laser protection.厦门大学中组部千人计划项目配套经

PEDOT∶PSS掺杂丝素蛋白复合薄膜的半导体性能

为了揭示丝素蛋白与有机半导体聚合物聚3,4-乙撑二氧噻吩:聚苯乙烯磺酸(PEDOT∶PSS)复合薄膜作为有源层的场效应,采用旋涂制膜法在重掺杂氧化硅片上制备了厚度均一、表面平整度较好的场效应...国家自然科学基金(11404272);; 中央高校基础研究基金项目(20720140514);; 福建省自然科学基金(22171024);; 国家教育部博士点专项基金(20130121110018)~

银纳米线涂层的编链结构纱线拉伸应变传感器

为制备柔性纱线拉伸应变传感器,将蚕丝加捻得到的蚕丝纱编织为闭口编链组织结构;通过多元醇还原硝酸银的方法制备银纳米线,在银纳米线的乙醇分散液中通过浸渍方法对基底纱线进行导电修饰,最终得到银纳米线涂层的编链组织拉伸应变传感器,研究了该组织结构拉伸应变传感器的应变-电阻传感性能。结果表明:编链组织结构的传感器具有显著的拉伸应变传感性能,该纱线传感器的电阻随着应变量的增加而减小;在拉伸应变小于5%的范围内,拉伸应变系数高达20. 14;传感器在0. 01～1. 00 Hz的拉伸频率范围内有稳定的响应,且传感器具有很好的循环稳定性。国家重点研发计划项目(2016YFC0802802

纳米金簇复合丝素薄膜的性能及其在生物成像中的应用

具有荧光性能的丝素薄膜可用于生物体内外实时的、无损伤的生物成像,为直观监测体内生物材料及其化学环境的变化提供了新思路。采用浇铸法制备纳米金簇复合丝素薄膜,研究了纳米金簇、甘油和制备过程中pH值对纳米金簇复合丝素薄膜结构和性能的影响。结果表明:纳米金簇和甘油的加入都会提高纳米金簇复合丝素薄膜β-折叠和结晶度,从而提高其断裂强度;在碱性条件下制备的纳米金簇复合丝素薄膜在680nm处可发射较强荧光;细胞能在制备的薄膜上正常黏附和生长,实现薄膜和细胞同时荧光成像。国家自然科学基金资助项目(51773171,U1405226)福建省科技厅自然科学基金资助项目(2017J06019)高等学校学科创新引智计划资助项目(B16029)厦门大学校长基金资助项目(20720160088,20720150218