羊毛二乙胺预处理及其染色工艺探讨

用二乙胺预处理羊毛,可以改善羊毛的染色性能,达到低温染色的目的,文章主要讨论了二乙胺预处理羊毛的工艺,对预处理后羊毛的染色性能等也进行了研究。     

Co‐Generation of Electric Power and Carbon Nanotubes from Dimethyl Ether (DME)

Coking occurs easily and would significantly degrade the electrochemical performance for hydrocarbon‐fueled solid oxide fuel cells (SOFCs). Here, we report an integrated device combining a SOFC and a stainless steel tubing as catalyst for hydrocarbon pyrolysis in the upstream of the fuel cell. Considerable carbon nanotubes (CNTs) are grown around the outside of the stainless steel tubing when dimethyl ether (DME) is fed to the device, which dramatically reduces the C:O ratio in the fuel reaching the cell anode. Correspondingly, the carbon‐removal reforming significantly prolongs the performance stability of the fuel cell compared to that directly fueled by DME. The present results suggest that hydrocarbons can be utilized more efficiently and economically by combining a SOFC and a fix‐bed reactor containing catalysts for CNTs formation, accompanying with the co‐generation of electric power and CNTs.     

接枝阻燃改性羊毛织物的性能测试

采用化学接枝聚合技术对客舱用羊毛织物进行阻燃接枝改性,分别利用傅里叶变换红外光谱仪、X射线仪、极限氧指数测定仪、热分析仪等对接枝羊毛织物的结构和性能进行分析测试。结果表明:经阻燃接枝处理后,羊毛织物的燃烧性能大大提高,极限氧指数可以达到32%;通过红外光谱和X射线能谱分析可知,乙烯基单体接枝在纤维表面;通过扫描电子显微镜和原子力显微镜也可看出,单体与羊毛织物发生了反应;通过接枝前后羊毛织物的热重分析可知,经阻燃整理后羊毛织物的最大分解处温度降低了近25℃,而且裂解结束时接枝羊毛织物的残渣量远远高于未处理织物。     

基于Packet Driver文件服务器设计

讨论在PacketDriver支持下 ,设计的一个通信协议及基于该协议的Client/Server机制的文件服务器 ,据此在单片机MC6 836 0和微机间实现文件访问     

低分子量双端羟基聚苯醚的合成研究

通过2,6-二甲基苯酚和四甲基双酚A氧化共聚合成低分子量聚苯醚,研究了单体配比、催化剂添加比例对聚合反应的影响,对反应产物进行了红外光谱、比浓黏度、分子量、产率、热失重、差示扫描量热法(DSC)、羟值等性能的表征与测试,成功制备出了分子量范围在1 500～3 000具有双端羟基的聚苯醚并确定了最佳合成工艺,产率均在70...     

防霉剂富马酸二乙酯的制备

以顺丁烯二酸酐和乙醇为原料 ,硫酸氢钠和氯化铝为催化剂合成富马酸二乙酯。考察了影响收率的因素 ,确定最佳工艺条件为 :顺丁烯二酸酐 0 1mol,乙醇 0 3mol,硫酸氢钠 0 5g ,氯化铝 0 6 g ,反应时间 4h ,油浴温度 110～ 12 0℃ ,收率可达 90 %以上。     

二乙基四硫的合成研究

以一氯化硫和乙硫醇为原料,石油醚作溶剂,在0～5℃之间反应5h,经缩合合成了二乙基四硫,实验最佳反应摩尔比(乙硫醇∶一氯化硫)为2 1,收率84 0%,产品纯度为89%。通过IR、1HNMR及高效液相色谱确定产品结构为二乙基四硫。     

Improvement of Poly(lactide) Ductile Properties by Plasticization with Biobased Tartaric Acid Ester

Diethyl l -tartrate (DET) is used as a biobased plasticizer for poly(lactide) (PLA) formulations with improved ductile properties without compromising biodegradation. Different weight percentages (wt.%) of DET in the 0–50 wt.% range are added to PLA by melt compounding and subsequently processed by injection molding. The effect of wt.% DET on mechanical, thermal, thermo-mechanical, morphology, biodegradation, and crystallinity is studied. Addition of 20 wt.% DET leads to a noticeable increase in elongation at break up to values of 567%, which is quite an interesting result considering the extreme brittleness of PLA. These results are verified by field emission scanning electron microscopy (FESEM) images, where filament-like structures are observed, indicative of an effective plasticization. Differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA) show that the glass transition temperature of PLA is drastically decreased down to values of 23 °C for the sample with the highest amount of DET (50 wt.%), thus increasing its ductility and processability. Fourier-transformed infrared spectroscopy (FTIR) spectra show that there exists chemical interactions between PLA and DET. Finally, the biodegradability analysis proves that the developed blends are fully biodegradable, achieving complete disintegration after 49 days. It is observed that DET enhanced the disintegration rate of PLA.     

醇水体积比对Cu-HMS介孔分子筛结构及PdCl_2/Cu-HMS催化性能的影响

通过改变EtOH/H2O体积比,制备了5个不同粒径和比表面积的Cu-HMS分子筛。采用红外、XRD、SEM和BET进行表征,研究不同乙醇/水体积比对Cu-HMS结构和表面形貌的影响。不同粒径的Cu-HMS与活性组分PdCl2结合制成氧化羰基合成碳酸二乙酯(DEC)的催化剂,选择性均达到100%。EtOH/H2O体积比为1.0的Cu-HMS分子筛的比表面积可达1 520.36 m2/g,DEC的时空收率达到110.3 g/(L·h)。