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paul9979金虫 (小有名气)
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[求助]
求助文献翻译一段，英译中，谢谢！
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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
金虫 (著名写手)
- 翻译EPI: 248
- 应助: 41 (小学生)
- 金币: 25806.4
- 红花: 25
- 帖子: 2084
- 在线: 567.1小时
- 虫号: 72410
- 注册: 2005-06-04
- 专业: 合成药物化学
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paul9979: 金币+35, 翻译EPI+1, ★★★★★最佳答案, 谢谢 2015-06-16 21:58:54
paul9979: 金币+35, 翻译EPI+1, ★★★★★最佳答案, 谢谢 2015-06-16 21:58:54
| 起始原料是使用正硅酸乙酯( TEOS)和硝酸铝九水合物(ANN)合成的。无水乙醇(EtOH)和其他起始原料以下列摩尔比进行混合：Al2O3:SiO2 = 1:1和EtOH:SiO2 = 20:1。这种凝胶是通过搅拌下向TEOS和EtOH溶液中加入ANN和EtOH的溶液得到的。将凝胶密封于烧杯中于70℃水浴中放置约13小时直到形成透明、均匀的凝胶为止。熟化36小时后，凝胶于105℃空气干燥６小时。 干凝胶于800℃焙烧２小时。 由这种水玻璃（固体质量分数= 39%,模数= 3.15）和氢氧化钠得到一种硅酸钠溶液（模数= 1.0）。使用纯Al2O3 - SiO2粉末、硅酸钠溶液和蒸馏水通过机械地搅拌以1.0质量比的固体物（铝硅酸盐粉末）与液体（硅酸钠溶液）制备Na地质聚合物样品。 形成的地质聚合物浆液的摩尔组成为Al2O3 - 2SiO2 - Na2O。地质聚合物浆液经机械搅拌后，将这种地质聚合物浆料浇铸到不同的塑模之中以制作不同形状的膜板。在本研究中,使用一种圆盘塑模（直径= 40毫米,厚度= 10）。通过使用不等的浇铸量的地质聚合物浆料能控制地质聚合物膜板的厚度。圆盘塑模密封并于60℃固化24小时。 固化的地质聚合物圆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小时。 热液作用完成之后,得到自承NaA沸石膜板。沸石膜板的厚度可以通过地质聚合物浆液的浇铸重量来判定。不同重量的浆液能够得到不同的厚度。已发现这种自承沸石膜板是通过晶体材料（NaA沸石）支撑的。使用X射线衍射、扫描电子显微镜和核磁共振方法进行这种地聚物材料和晶体样品的结构表征。使用高速表面积和孔径分析仪( NOVA & reg; e Series 2000, 康塔仪器公司，美国)，通过吸附及解吸附过程等温线分析测定微孔和中孔。 |
2楼2015-06-16 10:46:14