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| 本帖產(chǎn)生 1 個 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看 | ||
paul9979金蟲 (小有名氣)
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[求助]
求助文獻(xiàn)翻譯一段，英譯中，謝謝！
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| The starting materials were synthesized using a sol-gel method with tetraethyl orthosilicate (TEOS) and aluminum nitrate nonahydrate (ANN). Anhydrous ethanol (EtOH) and the other starting materials were mixed at the following molar ratios: Al2O3:SiO2 = 1:1 and EtOH:SiO2 = 20:1. The gel was obtained by the addition of a solution of ANN and EtOH to a solution of TEOS and EtOH with stirring. The gel was sealed in a beaker and placed in a water bath at 70ºC for approximately 13 h until a transparent, homogeneous gel was formed. After aging for 36 h at room temperature, the gel was dried in air at 105ºC for 6 h. The dried gel was calcined at 800ºC for 2 h. A sodium silicate solution (modulus = 1.0) was obtained with the water glass (solid mass fraction = 39%, modulus = 3.15) and sodium hydroxide. The Na-geopolymer specimens were prepared using pure Al2O3-SiO2 powder, sodium silicate solution, and distilled water by mechanically mixing the solid (aluminosilicate powder) with the liquid (sodium silicate solution) at a mass ratio of 1.0. The molar composition of the resulting geopolymer slurry was Al2O3-2SiO2-Na2O. After mechanically stirring the geopolymer slurry, the homogenous geopolymer paste was cast into different molds to fabricate membranes with different shapes. In this work, a disk mold (diameter = 40 mm, thickness = 10 mm) was used. The thickness of the geopolymer membrane can be controlled by different volumes of geopolymer paste casting. The disks mold were sealed and cured at 60ºC for 24 h. The cured geopolymer circular plates were removed from the molds and placed into 100 ml Teflon bottles with 50 ml of water at 90ºC for 6 h. After the hydrothermal process was performed, self-supporting NaA zeolite membranes were obtained. The thickness of zeolite membrane could be decided by casting weight of geopolymer slurry. Different weight slurry could get different thickness. The self-supporting zeolite membranes were found to be supported by crystalline materials (NaA zeolite). The structural characterizations of the geopolymeric materials and the crystalline specimens were conducted using XRD, SEM, and NMR techniques. The micropores and mesopores were measured by both adsorption and desorption isotherm analyses using high-speed surface area and pore size analyzers (NOVA® e Series 2000, Quantachrome Instruments USA). |
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jiangguofeng
金蟲 (著名寫手)
- 翻譯EPI: 248
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- 金幣: 25886.4
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- 蟲號: 72410
- 注冊: 2005-06-04
- 專業(yè): 合成藥物化學(xué)
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paul9979: 金幣+35, 翻譯EPI+1, ★★★★★最佳答案, 謝謝 2015-06-16 21:58:54
paul9979: 金幣+35, 翻譯EPI+1, ★★★★★最佳答案, 謝謝 2015-06-16 21:58:54
| 起始原料是使用正硅酸乙酯( TEOS)和硝酸鋁九水合物(ANN)合成的。無水乙醇(EtOH)和其他起始原料以下列摩爾比進(jìn)行混合：Al2O3:SiO2 = 1:1和EtOH:SiO2 = 20:1。這種凝膠是通過攪拌下向TEOS和EtOH溶液中加入ANN和EtOH的溶液得到的。將凝膠密封于燒杯中于70℃水浴中放置約13小時直到形成透明、均勻的凝膠為止。熟化36小時后，凝膠于105℃空氣干燥６小時。 干凝膠于800℃焙燒２小時。 由這種水玻璃（固體質(zhì)量分?jǐn)?shù)= 39%,模數(shù)= 3.15）和氫氧化鈉得到一種硅酸鈉溶液（模數(shù)= 1.0）。使用純Al2O3 - SiO2粉末、硅酸鈉溶液和蒸餾水通過機(jī)械地攪拌以1.0質(zhì)量比的固體物（鋁硅酸鹽粉末）與液體（硅酸鈉溶液）制備Na地質(zhì)聚合物樣品。 形成的地質(zhì)聚合物漿液的摩爾組成為Al2O3 - 2SiO2 - Na2O。地質(zhì)聚合物漿液經(jīng)機(jī)械攪拌后，將這種地質(zhì)聚合物漿料澆鑄到不同的塑模之中以制作不同形狀的膜板。在本研究中,使用一種圓盤塑模（直徑= 40毫米,厚度= 10）。通過使用不等的澆鑄量的地質(zhì)聚合物漿料能控制地質(zhì)聚合物膜板的厚度。圓盤塑模密封并于60℃固化24小時。 固化的地質(zhì)聚合物圓形板移出塑模并于盛有50毫升水的聚四氟乙烯瓶中于90℃放置６小時。 熱液作用完成之后,得到自承NaA沸石膜板。沸石膜板的厚度可以通過地質(zhì)聚合物漿液的澆鑄重量來判定。不同重量的漿液能夠得到不同的厚度。已發(fā)現(xiàn)這種自承沸石膜板是通過晶體材料（NaA沸石）支撐的。使用X射線衍射、掃描電子顯微鏡和核磁共振方法進(jìn)行這種地聚物材料和晶體樣品的結(jié)構(gòu)表征。使用高速表面積和孔徑分析儀( NOVA & reg; e Series 2000, 康塔儀器公司，美國)，通過吸附及解吸附過程等溫線分析測定微孔和中孔。 |
2樓2015-06-16 10:46:14
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