查询词典 solvent

Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane ,trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

利用静电纺丝法制备聚酯纳米纤维，选择苯酚和四氯乙烷，三氟乙酸，三氟乙酸和二氯甲烷3种溶剂分别溶解PET切片进行静电纺丝，通过扫描电子显微镜对纤维表面形态进行观察，结果表明：三氟乙酸和二氯甲烷混合溶剂溶解PET制备的电纺纤维较好。

Preparation of trifluoroacetaldehyde and trifluoroacetic acid by trifluoroethanol catalytic oxidation;2. Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane, trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

利用静电纺丝法制备聚酯纳米纤维，选择苯酚和四氯乙烷，三氟乙酸，三氟乙酸和二氯甲烷3种溶剂分别溶解PET切片进行静电纺丝，通过扫描电子显微镜对纤维表面形态进行观察，结果表明：三氟乙酸和二氯甲烷混合溶剂溶解PET制备的电纺纤维较好。

The nano-silica partrcles are organic-modified by E-MA-GMA elastomer through direct solvent process,the organic-modify process mechanism was studied,and the dispersing of modified nano-silica particles in tetrachloroethane solvent and PBT were investigated.FIRT,TEM,SEM results indicated that the epoxy group of E-MA-GMA could react with the hydroxyl groups of silica surface,helped to reduce the interactions of nano-silica particles particles and improve the dispersion of nano-silica on PBT and the interfacia...

surface modification ；溶液法利用功能化弹性体E-MA-GMA对纳米二氧化硅进行表面有机化修饰改性，分析了表面改性过程机理，同时考察了改性后纳米二氧化硅在四氯乙烷溶剂和PBT基体中的分散情况；FIRT、TEM、SEM测试结果表明，E-MA-GMA的环氧基团与纳米SiO_2的—OH基团发生反应，降低纳米二氧化硅粒子间的相互作用力，改善了纳米二氧化硅在PBT基体中的分散，提高复合材料的相容性。

Two synthetic technologies are em2 p loyed in commercial p roduction: solvent technology using tetrachloromethane as solvent, and no solventtechnology only using dimethyl carbonate itself.

固体光气是近年来迅速发展的绿色化工产品，主要通过碳酸二甲酯的光催化氯化反应合成，有四氯化碳溶剂法和碳酸二甲酯本体法工艺。

Waste oil category: Waste oil, waste hydraulic oil, waste oil, waste oil injection, waste kerosene, waste of white mineral oil, white waste oil, waste oil sparks, the repeal of toluene, waste cutting oil, gear oil, lubricants, batteries oil, spindle oil, zorra, oil, turpentine oil, solvent oil, gear oil, oil rails; waste chemical categories: one, the repeal of toluene, xylene waste, spent 2 pure benzene, acetone waste, waste Ding ketone, cyclohexanone 3 waste, waste dichloromethane, dichloroethane waste, waste Dichloropropane 4, solvent categories: soluble oil 6 #, 120 # dissolving agents, dissolving agents 200 # 5, trichloro ethylene, dichloromethane, trichloroethane; tetrachlorethylene, trichloromethane 6, the repeal of methanol, ethanol, waste, waste alcohol, isopropyl alcohol waste 7, the repeal of ethylene glycol, diethylene glycol waste, spent three 8 glycol, waste butyl acetate, ethyl acetate wastewater, waste acetate 9, the repeal of ethyl ether, acetonitrile waste, waste petroleum ether 10, cleaning categories: cleaning agent, washing machine water, days that water; wash board water,×oil wastewater liquid 11, the supply of tires category: special supply of fuel oil, non-standard oil, burner oil, waste oil and other refined crude oil.

废油类：废机油，废液压油，废柴油，废注塑机油，废煤油，废白矿油，废白电油，废火花机油，废甲苯，废切削油，齿轮油，润滑油，废电池机油，锭子油，索拉油，松节油，溶剂油，齿轮油，导轨油等；废化工类：1、废甲苯、废二甲苯、废纯苯2、废丙酮、废丁酮、废环已酮3、废二氯甲烷、废二氯乙烷、废二氯丙烷4、溶剂类： 6#溶油剂， 120#溶油剂， 200#溶油剂5、三氯乙烯，二氯甲烷，三氯乙烷；四氯乙烯，三氯甲烷6、废甲醇、废乙醇、废丁醇、废异丙醇7、废乙二醇、废二甘醇、废三甘醇8、废醋酸丁酯、废醋酸乙酯、废醋酸甲酯9、废乙醚、废乙腈、废石油醚10、清洗类：清洗剂，洗机水，天那水；洗板水，去渍油等废液废水11、废轮胎类供应：特价供应燃料油，非标油，烧火油，废油提练的原油等。

The technology that synthesizing 3-chlorine-2-hydroxy propyl trimethyl ammonium chloride with ethanol as solvent is simple, the consumption is less than other methods, the solvent can be used many times, the quality of the product is stable.

以乙醇法合成3-氯－2-羟丙基三甲基氯化铵工艺简单，耗能较少，溶剂可循环使用，产品性能优良，使用效果好。

It is shown that solvents may be classified by its effect into the active solvent and unactive solvent, and then, according to change of cold crystal peak area, effects of unactive solvents on the PET may be classified into three types: unchanged, reduced behind time and quickly reduced.

同时，对于非反应性的作用，依冷结晶峰面积的变化，又可分为三种类型：冷结晶峰面积不变，经诱导期后下降，无诱导期而迅速下降。

The sizes of the self-assembly micelles of the amphiphilic block copolymers and the effects werestudied by dynamic light scattering and UV-visible spectrophotometer. The micelle sizes werelargely influenced bythe hydrophobic chain content in the copolymer, the properties of the solvent and the copolymer concentration in the organic phase. The morphology of the micelles was investigated by transmission electron microscopy. Theresults showed that the micelles appeared spheres with inner core and outer shell. The critical association concentrations were determined by pyrene monomer fluorescence probe technology. The degradability of copolymer was studied by the loss of the intrinsic viscosity in the degradation process. The results indicated that the degradation rate of PECL was slower thanthat of PELLA and PEDLLA. The stability of the copolymer micelle dispersion was examined by measuring the critical flocculation concentration, which gradually decreased with increasing the content of thehydrophobic chain in the copolymer. The rheological results showed thatthe viscosity ofthe micelle dispersion with higher content of PEG segments was firstly decreased and then increased with the increasingthe temperature. Otherwise, the variation of viscosity was irregular. The viscosity of the micelle dispersion increased with the increase of the electrolyte (Na 2SO 4) concentrations. Polymer micelles paclitaxel was prepared by self-emulsification/solvent evaporation method and solid dispersion technique with amphiphilic block polymers as the carrier material.

运用动态光散射和紫外分光光度计研究了两亲性嵌段共聚物自组装胶束的粒径及其影响因素，结果表明，自组装胶束的形成机理受制备方式的控制，胶束的粒径随着共聚物相对分子质量或疏水嵌段相对分子质量和有机相中共聚物浓度的增大而增大，随着有机溶剂的水溶性的增强而减小；采用透射电镜观察胶束的形态结构，发现胶束呈具有核壳结构的均匀球形；采用芘荧光探针法测两亲性嵌段共聚物的临界聚集浓度；通过降解过程中共聚物特性粘度的变化研究两亲性共聚物的降解性能，发现与PELLA和PEDLLA的相比，PECL 降解速率较慢；随着共聚物中疏水嵌段含量的增大，纳米分散液的稳定性逐渐下降；PEG含量高的PEDLLA纳米分散液随着温度的升高，纳米分散液的粘度先下降然后增大，反之，没有规律性，且随着电解质Na 2SO 4浓度的增大，体系粘度增大。

In addition, a further study was made of the technique of extraction, isolation and purification of GLA. The factional extraction used in the laboratory with n-hexane and ethanol was changed into the whole extraction of 6〓 solvent, which simplified production technique and reduced cost of production. The fungal lipid extracted from the fermentation in the medium-scale test was concentrated by the urea adducting method with methanol as solvent, at 75～80℃ for 3 hours. After GLA had been adducted twice, the content of GLA came up to 84. 25%, around a twelfth as much as the original concentration.

并对γ—亚麻酸的提取和分离纯化工艺进行了研究，将实验室中用正己烷和乙醇分步抽提的工艺改为用6〓溶剂一步抽提技术，从而简化了生产工艺，降低了生产成本；采用脲素包合法，以甲醇作为溶剂，温度控制在75～80℃，包合时间为3h，对中试发酵所提取的菌油进行了浓缩，γ—亚麻酸两次包合后，GLA含量达到84.25%，比原浓度浓缩了近十二倍。

Based on the retention and Z (the number of solvent molecules involving in t he displacement from stationary-phase surface ), log I (a constant relating t o the affinity of 1 mol of solute to the bonded stationary phase ), and j (a const ant r elating to the affinity of 1 mol of solvent to the bonded stationary phase ), th e elution strength of acetic acid-water mobile phase was found to be stronger th a n that of methanol-water-TFA.

用参数Z （1 mol溶剂化溶质被溶剂化固定相吸附时从两者接触表面释放出置换剂的摩尔总数），log I （与1 mol溶质对固定相亲和势有关的常数）和j（与1 mol溶剂对固定相亲和势有关的常数）对9种蛋白质在此流动相体系中的保留进行了表征。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷