绢丝/亚麻/精梳棉混纺针织纱的开发

介绍了绢丝/亚麻/精梳棉3种纤维的性能特点,并对3种纤维混纺纱的生产实践过程进行了分析,探讨了梳棉、并条、粗纱、细纱等工序的纺纱关键技术。各工序通过优化配置工艺参数,保证了纺纱的顺利进行,提高了成纱质量。     

不同混纺比的甲壳素/棉混纺纱性能研究

基于甲壳素纤维在保健方面的优越性能,将其与天然棉纤维进行混纺,纺制出5种不同比例的纱线,分别是纯棉、1∶9、2∶8、3∶7、4∶6甲/棉混纺纱。通过织物性能测试与对比分析,得到最佳混纺比,使棉纤维在发挥自身优良性能的同时,额外获得抗菌方面的保健功效。实验结果表明,随着甲壳素含量的增加,对混纺纱的强伸性能和条干不匀有显著影响,而对纱线毛羽影响不大。     

Enhancing hydrogen gas separation performance of thin film composite membrane through facilely blended polyvinyl alcohol and PEBAX

Polymeric membranes offer economic separation processes but are less explored for H₂ separation application. This work aims to unveil the H₂ separation potential of polymeric membrane by developing PVA-based reverse selective composite membrane. CO₂-selective PEBAX was blended at different PVA:PEBAX ratio. The effect of PEBAX blending on membrane morphology, crystallinity and gas separation behavior was studied. Incorporation of PEBAX at <50 wt% resulted in composite with improved CO₂ permeability but selectivity loss. Blending of >60 wt% PEBAX enhanced both permeance and selectivity of the resulted composite as the host matrix was dominated by this PEO containing material thus greatly enhancing polymer chain mobility and promoting CO₂-solubility. The best composite which contains 60 wt% PEBAX exhibited CO₂ permeability of 20.0 Barrer and CO₂/H₂ selectivity of 7.6. This performance surpasses the Robeson's boundary and unleashes the potential of tailoring the properties of polymeric nanocomposite membrane for H₂ separation application through facile PVA/PEBAX blending.     

Investigation of photovoltaic-hydrogen power system for a real house in Turkey: Hydrogen blending to natural gas effects on system design

In the study, the effects of hydrogen mixing studies at the rate of 20% to the natural gas system which is an ongoing study in Turkey, on the photovoltaic system (PV) is investigated using a real house consumption. Providing the annual electrical energy consumption (1936,83  kWh) and 20% of natural gas consumption (62,4 m³) of a real house with hydrogen is included in the study. A PV-hydrogen system is theoretically investigated to provide the energy required for hydrogen production from solar panels. Hydrogen blending effects on PV size, capacity usage, and carbon footprint are analyzed. Thus, the contribution was also made to the “green hydrogen” works and reduction of the carbon footprint of the house. It was found that the required hydrogen for electricity can be provided 52,5 m² solar panel area and 14,28% increase in this area and installed power can provide an amount of hydrogen that need for 20% hydrogen blending to the natural gas system. The overall system capacity usage decreased when the system is used for 20% hydrogen blending to the natural gas system. The carbon footprint of the house was decreased by 67,5%. If the hydrogen has not been blended with 20% natural gas, this ratio would have been 59,2%.     

掺混甲烷对预混合丙烯火焰碳烟生成的影响

基于当量比为1.79且最高火焰温度为1 829 K的预混合丙烯火焰,研究了燃料掺混对碳烟生成的影响以及协同效应.分别将5％、20％、40％摩尔分数的甲烷混合到丙烯中,形成具有相同当量比和最高火焰温度的预混火焰.使用微孔探针采样技术和扫描电迁移率粒径谱仪,在燃烧器稳定滞止火焰中测量了碳烟粒径分布.研究发现,掺混甲烷后的火...     

Stearns-Noechel模型优化及毛条混色配色系统开发

针对缺少理想的混色模型现状和开发计算机混色配色系统的迫切需要,在对经验Stearns-Noechel模型优化和改善的基础上建立了适用于毛条混色应用需要的计算机配色预测数学模型。分析了基于优化的Stearns-Noechel模型实现混色毛条计算机配色的三刺激值配色原理及算法流程,提出在配方预测中修正误差的方法及配色效果的控制方法。依此开发的计算机混色配色系统,经过实际的配色实验检验,显示出快速、准确提供配方的能力,平均预测色差为0.614 CIELab单位,证明开发的配色系统对毛条混色产品的配色是非常有效的。     

大豆纤维/腈纶混纺产品的定量分析

介绍了REACH法规所涉及化学品的毒性测试要求,分析了纺织行业中常用的致癌染料、致敏染料、有机氯载体等16类有害化学物质的毒性,阐述了致癌、致畸、致突变和过敏性作用及其测试方法。     

灵芝保健酒的研制

灵芝保健酒以灵芝为主，辅以枸杞，经优级食用酒精提取，用优质口子酒勾兑而成。该酒酒度低，营养价值高，是具有独特风味的滋补保健酒。灵芝经粉碎后，先用10倍体积(质量与体积比=1：10)的95％食用优级酒精于60℃提取4h，然后过滤出滤液，将残渣用8倍体积的85％食用酒精在相同温度下继续提取2h，残渣再用6倍体积的70％食用酒精提取2h。合并3次提取液，过滤后，真空浓缩至完全除去食用酒精为止。用55度优质口子酒、灵芝和枸杞提取物、纯净水勾兑成酒度为25度的保健营养酒。(庞晓)     

一种新型绿色纤维—胶原蛋白与壳聚糖共混纤维

废物利用和环境保护已越来越引起全世界人们的关注与高度重视。壳聚糖与胶原蛋白是最重要的2种天然 高分子材料。良好的生物相容性、可生物降解性及可再生性,使其越来越引起人们极大的研究兴趣。本文介绍了一种新型的壳聚糖与胶原蛋白共混纤维,这种新型纤维具有优良的力学性能、抗菌性、生物相容性和可生物降解性等优点。由此纤维制成的内衣织物,可望在激烈的市场竞争中拥有广阔的前景。     

Friedel-crafts烷基化反应就地增容PE/PS合金

在融熔状态下 ,利用Friedel-crafts烷基化反应就地增容HDPE/PS合金 ,考察了催化剂品种 ,用量、温度、时间等对合金性能的影响。结果显示 ,无水三氯化铝为一有效催化剂 ,对于HDPE/PS =70 / 3 0共混物 ,加入 1 2 %无水三氯化铝 ,14 0℃ ,混炼 10分钟 ,可获得较高机械性能的合金