Materials Literature
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采用碱辅助的原位水热合成法制备了纳米金属有机骨架材料MIL-101（Cr）NH2,研究了合成液中NaOH加入量对其晶体结构、形貌和孔结构的影响,测定了273.4,298和333K下CO2和N2在MIL-101（Cr）NH2上的等温吸附曲线,并对其性质进行了表征.结果表明,加入适量碱（NaOH：NH2BDC=4：2,摩尔比）可得到粒径约40nm的MIL-101（Cr）NH2纳米颗粒,其BET比表面积可达2594m2/g,孔容为2.11cm3/g,273.4K时CO2的吸附量可达25.9mmol/g,CO2与N2的理想分离系数为19.4.
Ces dernières années la micro-fluidique a développé des techniques qui permettent d’étudier et manipuler des objets déformables micrométriques (gouttes, vésicules, capsules...). Parmi les applications possibles de ces objets on peut citer l'encapsulation des médicaments pour délivrer des substances dans le sang, le pl…
CIGS is currently the subject of numerous studies, having shown high efficiencies both in laboratories and in the industry. This material is polycrystalline, and presents strong spatial property fluctuations. It is admitted that these fluctuations impact the global parameters of the cell, either positively or negative…
New generations of protein-based hydrogels are being developed rapidly over the last several decades for potential applications in biomedicine as well as basic biological studies. Protein-based hydrogels have been explored as synthetic extracellular matrices (ECM) for applications in cell culture and tissue regenerati…
The electronic structure,magnetic and half-metal properties of inorganic-organic hybrid compound [C4N2H12][Fe4Ⅱ（HPO3）2（C2O4）3] are investigated by using the full-potential linearized augmented plane wave （FPLAPW） method within density-functional theory （DFT） calculations.The density of states （DOS）,the total energy of…
Polyethylene (PE) is commonly used for many purposes throughout many industries due to its excellent properties. However, PE has low surface energy, which results in poor interfacial adhesion. One of the solutions to improve the interfacial adhesion will be to modify the surface of PE. There are many methods of surfac…
密炼制备了聚乳酸／聚丙撑碳酸酯／淀粉（PLA／PPC／ST）三元共混物，研究加工方式对材料水蒸气阻隔性、吸水率、力学性能、形貌等的影响。研究发现：C体系中，PPC包裹在ST周围，隔绝ST与水汽接触，材料阻隔性最高。20℃时．C50水蒸气阻隔性较B50与A50分别提高了19．4％与25．2％。C体系吸水率明显低于A和B体系。同时，分散相ST颗粒大小为A体系〉B体系〉C体系，力学性能优劣为C体系〉B体系〉A体系。
Carbon based microporous material is commonly used as sorbent for oil spill incident as they are inexpensive, hydrophobic characteristic, and high sorption capacity. For instance Granular Activated Carbon is commonly used as sorbent in the waste water industry to remove organic contaminant. Exhausted Granular Activate…
采用高温固相反应法制备了Sr2SiO4：xEu2＋荧光粉,研究Eu2＋所占据的 Sr2SiO4中Sr1和Sr2两个不同格位及掺杂浓度和激发波长对格位发光的影响。荧 光粉发射光谱为一双峰的宽发射光谱,可拟合为峰值位置位于480nm 和530nm的两条高斯曲线,分别对应Eu2＋所占据的Sr1和Sr2两 个不同格位的发射。随着 Eu2＋掺杂浓度增加,Sr1和Sr2格位的发光强度均出现浓度猝灭现象,Sr2格位的 长波长发射峰出现明显红移现象,而Sr1格位的短波长发射峰发生红移-蓝移-红 移现象,这与Sr1和Sr2格位的优先占据以及格位间能量传递有关。随着激发波 长的增加,Sr2格位的长波长发射的发光强度与Sr1格位的短波长发射的发光强 度…
Ozet Arastirmacilar, endustriyel malzemelerin dayanim ozelliklerini, gun gectikce artan endustriyel beklentileri karsilamak amaciyla, surekli gelistirme calismalarina devam etmektedirler. Bu calismalarin bircogu; kompozit malzemelerin (KM) gelistirilmesi uzerinedir. Bu malzemeler, gunumuzde geleneksel malzemelerden ay…
Le dialkyldithiophosphate de zinc ( ZDDP ) est un additif anti-usure habituellement utilise dans les lubrifiants moteurs. Dans des conditions severes de frottement, les molecules de ZDDP forment sur les surfaces metalliques un film, appele tribofilm, qui protege ces surfaces de l'adhesion et de l'abrasion. Les tribofi…
以邻苯二甲酸二丁酯（DBP）和N,N-二甲基乙酰胺（DMAc）为混合稀释剂,采用热致相分离法（TIPS）制备了聚偏氟乙烯（PVDF）/酚酞型聚醚砜（PES-C）共混膜,考察了不同凝固浴温度对膜结构和性能的影响。采用扫描电镜观察了膜的结构,测试了膜的纯水通量。运用DSC和XRD方法检测了膜的结晶性能。将制备的膜在膜生物反应器（MBR）中运行测试了膜的污水通量和出水指标。随凝固浴温度的升高,共混膜的最高熔融温度上升,膜中α晶型的含量增加。在凝固浴温度为25℃时,膜形成了较为致密的皮层结构和较为疏松的支撑层结构,此时共混膜的纯水通量和污水通量达到最大值,且MBR出水COD和NH4＋-N含量达到排放要求。
To introduce the special issue this paper reviews the use of protists as bioindicators. Seven key advantages of protist bioindicators are highlighted, namely: environmental sensitivity, functional importance, distribution, size and numbers, response times, ease of analysis and preservation potential. Protist bioindica…
Diamond has always been well known for their beauty and the extreme tribological properties it possessed. Diamond-like carbon (DLC) is much less famous, but over the years researchers discovered its potential and placed more emphasis on it. This leads to the significant improvement to DLC film property. This project w…
In this work, inhibition efficiency of two sets of tested inorganic and organic corrosion inhibitors was investigated using PM6 semiempirical and B3LYP/6-31G* levels. The experimental inhibition of both sets were investigated qualitatively to seek a correlation with computed quantum mechanical descriptors including en…
以乙二胺四乙酸（H4edta）、三氧化二锑、氧化钆为主要原料，在水溶液中反应合成了锑（III）和钆（III）的三核杂金属配合物[Sb：（edta）：Gd（H2O）。]NO3·3H2O，用元素分析、红外光谱、x射线粉末衍射和热分析等方法对配合物的组成和结构进行了表征。x射线粉末衍射数据指标化计算结果证实该配合物晶体结构属于单斜晶系，晶胞参数为：a=11．259A，b=9．689A，c=20．489A，β=94．099°。其热分解过程包括失水、配体及NO3的氧化分解过程，最后完全形成金属氧化物。
采用高温固相反应法制备了KSrBP：O6：RE（RE=Eu2＋，Tb3＋，Eu3＋）系列荧光粉。利用X射线衍射仪对样品的物相结构进行了分析，结果表明：稀土离子的掺人没有改变荧光粉的主晶相。利用荧光光谱仪对样品的发光性能进行了测试，发现在近紫外光激发下掺杂Eu2＋离子的样品具有宽带发射峰，最强发射位于450nm左右，对应于Eu2＋离子的4f65d1→4f7辐射跃迁。随着Eu2＋掺杂量的增加，发射光从蓝光逐渐转变到蓝白光。另外，KSrBP208：Tb3＋和KSrBP208：Eu3＋能够在近紫外光激发下分别发射出绿光和红光，其最佳掺杂浓度分别为0．04％和0．08％（摩尔分数）。
The family of triphenylamine (TPA) derivatives has attracted intense research interest during the last few decades due to their excellent charge transporting properties. We attempted to introduce triphenylamine derivatives into poly(N-vinylcarbazole) to improve the performance of PLED. Polymeric hole-transport materia…
低温烧结制备了添加晶核剂S（CaCO3，H3BO3，SiO2为原料）的CaO-B203-Si02（cBs）玻璃陶瓷。研究了晶核剂S对所制CBS的主晶相及其性能的影响。结果表明：在CBS玻璃陶瓷中，包含β-CaSi03、α-Si02和CaB2O4三种晶相，晶核剂S能促进主晶相的形成，提高析晶度。S的添加量为质量分数8％时，所得到CBS性能最好：er=6．11，tanδ=0．0009，弯曲强度δf≥220Mpa。
在MP2水平上,采用全电子基组,对C2H2与HX（X=F,Cl,Br,I）相互作用进行了研究.构型优化同时进行频率验证,得到4个T型结构的稳定复合物,相互作用能在-12.761～-7.086kJ/mol之间.自然键轨道（NBO）与分子中的原子（AIM）理论分析表明,形成复合物分子间的电荷转移量都很少,最大仅为0.009a.u.,作用强度与氢键类似.对称性匹配微拢理论（SAPT）能量分解数据表明,对于C2H2…HX（X=F,Cl,Br,I）体系,从F到I,静电作用逐渐减弱,色散作用逐渐增强;相互作用能中对吸引能的贡献主要为静电能和色散能,二者之和占到80%以上,诱导能所占的比例很小,卤化氢与乙炔分子间相互作用的本质为静电作用和色散作…