喷丝头组合花板的真空熔炼

化纤生产行业的粘胶，经过装在组合花板上的喷丝头在酸浴里形成化学纤维。粘胶为碱性物质，酸浴的化学成份为稀硫酸、磷酸，酸浴温度为57℃左右，组合花板内压力为10kg／cm^2，要求组合花板材料在有足够的强度下，具有高耐腐蚀性能。     

FFC-1离子交换纤维对酸碱有害气体吸附性能的研究

系统考察了不同直径及反离子形式的FFC-1聚羧酸离子交换纤维对酸碱有害气体的穿透吸附,各种温、湿度条件下的吸水率,以及作为有害气体吸附滤除材料的重复使用与再生性能。研究表明:FFC-1纤维直径的减小有利于提高对有害气体的动态吸附容量。在体系温度、相对湿度分别为15℃、50%时,以3D腈纶为起始原料的钠型FFC-1离子交换纤维的吸水率≥350mg/g.纤维;对SO2的穿透吸附容量可达200mg/g.纤维。FFC-1离子交换纤维具有良好的重复使用与再生能力,经20次再生循环使用后,纤维交换容量未见明显变化。     

STUDIES ON THE PREPARATION OF ZINC-CONTAINING ACTIVATED CARBON FIBERS AND THEIR ANTIBACTERIAL ACTIVITY

1. INTRODUCTION Microbial pollution will bring about various problems in industry and other vital fields, such as causing decomposing of materials, harming people抯 health. In order to reduce these problems, new antibacterial materials have been demanded. Recently, much attention has been paid to inorganic materials including zinc oxide [1~4]. These inorganic antibacterial materials are now substituting for organic materials to avoid releasing noxious organic molecules harmful to humans;…     

超大比表面石油沥青基碳纤维微电极研究

作者研制了一种以石油沥青基碳纤维为电极材料的微电极,基于此种材料的特殊性能,经氧化处理后可获得较一般微电极为大的比表面积,因而其电流响应亦较一般微电极为大。且由于其表面在一定条件下可生成大量的碳氧基团,故其电极电位会随溶液ｐＨ值而线性变化,以至该电极亦可用作测量ｐＨ值的微电极。     

Effect of take-up speed on physical properties and permeation performance of cellulose acetate hollow fibers

Cellulose acetate (CA) ultrafiltration hollow fibers were spun via the dry-jet wet spinning technique. The effect of the take-up speed on the mechanical properties, morphology, thermal properties, pure water permeation, retention, and surface characterization of hollow fiber membranes were investigated. Both the inner and outer diameters of the hollow fiber decreased with the increase of take-up speed. Macrovoids were observed on the inner surface of the drawn hollow fibers. The d-space decreased with the increase of the take-up speed. The ultimate tensile stress (UTS) increased and the breaking elongation decreased with the increase of take-up speed. The permeation performance was measured. The hydraulic permeability increased and the retention decreased slightly with the increase of the take-up speed. The surface roughness increased with the increase of the take-up speed. The thermal analysis results showed that the endothermic peak shifts to the higher temperature region and coefficient of thermal expansion (CTE) decrease for a higher take-up speed.     

Dehydration of tetrafluoropropanol (TFP) by pervaporation via novel PBI/BTDA-TDI/MDI co-polyimide (P84) dual-layer hollow fiber membranes

A novel PBI/P84 co-polyimide dual-layer hollow fiber membrane has been specifically fabricated through the dry-jet wet phase inversion process, for the first time, for the dehydration pervaporation of tetrafluoropropanol (TFP). Polybenzimidazole (PBI) was chosen as the outer selective layer because of its superior hydrophilic nature and excellent solvent-resistance together with robust thermal stability, while P84 co-polyimide was employed as the inner supporting layer because of its good solvent-resistance and thermal stability. The PBI/P84 membrane exhibits superior water selectivity and relatively high permeation flux. At 60 °C, the PBI/P84 dual-layer hollow fiber membrane shows a permeation flux of 332 g/(m² h) and a separation factor of 1990 for a feed solution containing of 85 wt% TFP. The preferential water sorption and the significant diffusivity difference between TFP and water are the main causes of high separation factor. However, an increase in feed temperature will greatly increase the permeation flux but seriously decrease the water selectivity. The activation energy data verify that water can preferentially permeate the PBI membrane due to the strong water affinity of PBI and a much smaller molecular size of water.     

碳纤维布提高高强混凝土柱抗震能力评估方法

针对利用碳纤维布加固既有建筑中的高强混凝土柱，以及加固后抗震性能的评估问题，对7根高强混凝土柱进行试验研究，分析了碳纤维布约束高强混凝土的影响因素和约束机理．通过理论推导和统计回归的方法．提出了碳纤维布加固高强混凝土柱位移延性比的理论计算方法和基于两个回归公式的简化计算方法．两种计算方法概念清晰，简便适用，分析结果与试验值的相对误差控制在20％左右，可以满足抗震加固设计的要求．两个回归公式的决定系数R^2分别为0．97和0．99，具有很高的拟合精度，可用于碳纤维布约束混凝土柱的相关研究．     

二醋酯纤维的结构特性

采用DSC、X-射线衍射和密度梯度管等技术研究了二醋酯纤维的结晶、取向等结构特性，初步探讨了不同纺丝工艺对纤维结构特性的影响，发现：二醋酯纤维存在两种晶型结构，结晶度和取向度都较低；以相同二醋片为原料时，纺丝工艺对纤维的结构特性有影响但不明显，而烟用纺丝工艺和纺织用纺丝工艺之间的差别对纤维结构特性的影响则相对较大。     

涤纶的酶法改性研究进展

从涤纶纤维自身的特性和其改性研究的现状、理想的涤纶表面改性应满足的要求以及酶在纺织工业中的应用现状等方面出发,综述了涤纶纤维及其织物酶法改性的背景和国内外研究现状,介绍了涤纶酶法改性研究中所用的酶以及酶的筛选方法,探讨了涤纶酶法改性研究中存在的若干问题,并对涤纶酶法改性的前景做了展望.