N,N′-二(3,4-二甲氧基苄基)-1,2-乙二胺的合成研究

N ,N′ 二 (3,4 二甲氧基苄基 ) 1,2 乙二胺是合成抗癌增效剂SDB 乙二胺等药物的重要中间体。通过研究确证了其真实结构 ,改进了提纯方法 ,提高了后续反应的收率     

乙二胺不同掺杂模式下多孔有机聚合物对CO2的吸附

利用嫁接法和浸渍法分别在以1,3,5-三苯基苯为单体的有机多孔聚合物（nTPB）上成功掺杂乙二胺,分别研究了乙二胺的不同掺杂模式对多孔聚合物的结构性质以及CO₂吸附性能的影响。结果表明,嫁接法和浸渍法皆可在nTPB上均匀掺杂乙二胺,且nTPB的比表面积和孔容均有所下降。在乙二胺掺杂量相同的前提下,由于浸渍法完全利用nTPB的孔道吸收乙二胺,nTPB的孔道堵塞更明显。两种掺杂乙二胺的模式均可显著提升nTPB对CO₂的吸附选择性,但只有嫁接法对nTPB的CO₂吸附量有明显促进（从4.4 mmol/g升高为5.2 mmol/g;0℃,10⁵ Pa）;浸渍法由于过度堵塞nTPB孔道,且乙二胺的吸附位点被包埋,导致CO₂的吸附量反而下降（仅有3.4 mmol/g;0℃,10⁵ Pa）。此外,嫁接法掺杂乙二胺的nTPB表现出与nTPB基质相同的良好重复利用性。     

Mechanochemically assisted synthesis of titanium carbonitride from metal and organic precursor

Ultrafine TiC_0.29N_0.38 powders with a particle size of approximately 170 nm were synthesized by mechanochemical synthesis combined with moderate-temperature annealing using Ti and ethylenediamine as raw materials. Ethylenediamine plays a versatile role in the fabrication of ultrafine TiC_xN_y powders. It can serve as not only carbon and nitrogen sources, but also a process control agent, that facilitates the generation of ultrafine particles. A dense TiC_0.3N_0.39 ceramic with a high hardness of 16.7 GPa was obtained by spark plasma sintering at a considerably reduced temperature of 1100°C. This simple, energy-efficient method is a novel approach to synthesizing valuable TiC_xN_y.     

碳酸二乙酯气固相催化合成N-乙基乙二胺

以碳酸二乙酯和乙二胺为原料,气固相催化合成N-乙基乙二胺。考察了不同催化剂(丝光沸石、β沸石、Y分子筛)、碱金属(Li、Na、K)离子改性的催化剂和反应条件对该烷基化反应的影响。结果表明,在实验所用的催化剂中,Y分子筛具有最高的催化活性;Y分子筛用不同阳离子改性后对反应有显著影响,其中,NaY分子筛催化效果最好;在反应温度为240℃,n(乙二胺)/n(碳酸二乙酯)=2,质量空速为15.8 h-1,氮气流速为120 mL/min的反应条件下,N-乙基乙二胺的产率可达93.1%。     

石墨烯柔性导电改性涤纶织物的制备与性能

采用乙二胺（EDA）和氢氧化钠对涤纶织物进行改性，获得氨基化改性涤纶，再将改性涤纶浸渍氧化石墨烯（GO）溶液，涤纶表面的GO还原成还原氧化石墨烯（RGO）后得到具有导电性能的涤纶织物。采用扫描电镜（SEM）对导电涤纶进行表征，并进行耐洗和耐摩擦性能测试。研究结果表明，涤纶织物经EDA改性后对GO的吸附能力增强，织物导电性增加；改性涤纶的最佳导电整理工艺为GO溶液pH值6，5 g/L保险粉在95℃还原60min可使织物上GO较充分还原，改性涤纶织物的导电性随GO浓度的增大、还原温度的增加和还原时间的延长而增强，当GO为2g/L时，改性涤纶的表面电阻值降低至14.575 KΩ/cm。由SEM结果可知未经改性的涤纶织物表面光滑，经导电整理后织物表面覆盖一层石墨烯薄膜。     

含有弱金属-氮键的磷钼酸有机衍生物的研究

［（ＥＤＴＢ）Ｍ］（ＣＨ３ＣＯＯ）２和Ｈ３ＰＭｏ１２Ｏ４０在无水乙醇中反应得到［（ＥＤＴＢ）Ｍ］（ＨＰＭｏ１２Ｏ４０）,Ｍ为Ｃｕ、Ｃｏ,ＥＤＴＢ为Ｎ,Ｎ,Ｎ′,Ｎ′－四［（２－苯并咪唑）甲基］－１,２－乙二胺。测定了它们的ＩＲ、ＨＮＭＲ、紫外－可见光谱和元素分析以及对酯化和乙酸环己酯热消除反应的催化活性。     

Poly(vinyl alcohol)/ZIF‐8‐NH2 mixed matrix membranes for ethanol dehydration via pervaporation

Ethanediamine‐modified zeolitic imidazolate framework (ZIF)‐8 particles (ZIF‐8‐NH₂) is synthesized and incorporated in the poly(vinyl alcohol) (PVA) matrix to fabricate novel PVA/ZIF‐8‐NH₂ mixed matrix membranes (MMMs) for pervaporation dehydration of ethanol. The PVA/ZIF‐8‐NH₂ MMMs exhibit enhanced membrane homogeneity and separation performance because of the higher hydrophilicity and restricted agglomeration of the particles, as compared to corresponding MMMs loaded with unmodified particles. The effect of ZIF‐8‐NH₂ loading in the MMMs is studied and the MMM with a 7.5 wt % ZIF‐8‐NH₂ loading shows the best pervaporation performance for ethanol dehydration at 40°C. Various characterization techniques (Fourier transform infrared, scanning electron microscope, contact angle, sorption test, etc.) are used to investigate the MMMs loaded with ZIF‐8 and ZIF‐8‐NH₂ particles. The impact of operation conditions on pervaporation performance is also performed. The performance benchmarking shows that the MMMs have superior separation factors and comparable flux to most other PVA hybrid membranes. © 2016 American Institute of Chemical Engineers AIChE J, 62: 1728–1739, 2016