Preparation and characterization of fine silver powder with colloidal emulsion aphrons
文献类型：期刊论文
| 作者 | Dai, Yujie; Deng, Tong; Jia, Shiru; Jin, Long; Lu, Fuping |
| 刊名 | JOURNAL OF MEMBRANE SCIENCE
 |
| 出版日期 | 2006-09-15 |
| 卷号 | 281期号:1-2页码:685-691 |
| 关键词 | colloidal emulsion aphron emulsion liquid membrane silver powder nano-porous microsphere fine particles |
| ISSN号 | 0376-7388 |
| 其他题名 | J. Membr. Sci. |
| 中文摘要 | Colloidal emulsion aphrons (CEAs) can be considered as the micrometer- sized water-in-oil emulsion cores encapsulated by a "soapy shell" consisting of multi-layer surfactant molecules. The emulsion core sizes of CEA dispersion are roughly in 10-100 mu m, whereas the sizes of inner phase are in 1-5 mu m. CEAs can be used as a microreactor to synthesize fine powder materials. Silver powders with various sizes and shapes were prepared with di-(2-ethylhexyl) phosphoric acid (D2EHPA) as the mobile carrier in membrane phase, ascorbic acid (V,) as reducing agent in inner phase and cyclohexane as the membrane of CEAs. The linear silver particles were formed under low mobile carrier concentration in membrane phase or low ascorbic acid concentration in inner phase, whereas the granular silver particles with comparatively small sizes were obtained under the high mobile carrier concentration or high ascorbic acid concentration, and also silver powder of "nano-porous microsphere" was prepared with CEAs by adjusting the D2EHPA concentration in membrane phase, ascorbic acid concentration in inner phase and the molar ratio of silver ion to ascorbic acid (n(Ag+/vc)). Compared with emulsion liquid membrane (ELM) method, the silver powder prepared with CEAs was usually in granular form with smaller sizes because of the higher transfer rate, but for that prepared with ELMs was only in linear form. Two kinds of silver powder samples with typical shapes, one is the "nano-porous microsphere" prepared with CEAs and the other is the linear silver powder prepared with ELMs, were characterized by thermogravimetry (TG)-differential thermal analysis (DTA), X-ray powder diffraction analysis and field emission scanning electron microscope (FESEM). (c) 2006 Elsevier B.V. All rights reserved. |
| 英文摘要 | Colloidal emulsion aphrons (CEAs) can be considered as the micrometer- sized water-in-oil emulsion cores encapsulated by a "soapy shell" consisting of multi-layer surfactant molecules. The emulsion core sizes of CEA dispersion are roughly in 10-100 mu m, whereas the sizes of inner phase are in 1-5 mu m. CEAs can be used as a microreactor to synthesize fine powder materials. Silver powders with various sizes and shapes were prepared with di-(2-ethylhexyl) phosphoric acid (D2EHPA) as the mobile carrier in membrane phase, ascorbic acid (V,) as reducing agent in inner phase and cyclohexane as the membrane of CEAs. The linear silver particles were formed under low mobile carrier concentration in membrane phase or low ascorbic acid concentration in inner phase, whereas the granular silver particles with comparatively small sizes were obtained under the high mobile carrier concentration or high ascorbic acid concentration, and also silver powder of "nano-porous microsphere" was prepared with CEAs by adjusting the D2EHPA concentration in membrane phase, ascorbic acid concentration in inner phase and the molar ratio of silver ion to ascorbic acid (n(Ag+/vc)). Compared with emulsion liquid membrane (ELM) method, the silver powder prepared with CEAs was usually in granular form with smaller sizes because of the higher transfer rate, but for that prepared with ELMs was only in linear form. |
| WOS标题词 | Science & Technology ; Technology ; Physical Sciences |
| 类目[WOS] | Engineering, Chemical ; Polymer Science |
| 研究领域[WOS] | Engineering ; Polymer Science |
| 关键词[WOS] | REDUCTION ; NANOCRYSTALS ; DISPERSION |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000240207800073 |
| 公开日期 | 2013-10-24 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/4042]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Tianjin Univ Sci & Technol, Coll Biotechnol, Tianjin Key Lab Ind Microbiol, Tianjin 300222, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China 3.Shijiazhuang Railway Inst, Shijiazhuang 050043, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dai, Yujie,Deng, Tong,Jia, Shiru,et al. Preparation and characterization of fine silver powder with colloidal emulsion aphrons[J]. JOURNAL OF MEMBRANE SCIENCE,2006,281(1-2):685-691. |
| APA | Dai, Yujie,Deng, Tong,Jia, Shiru,Jin, Long,&Lu, Fuping.(2006).Preparation and characterization of fine silver powder with colloidal emulsion aphrons.JOURNAL OF MEMBRANE SCIENCE,281(1-2),685-691. |
| MLA | Dai, Yujie,et al."Preparation and characterization of fine silver powder with colloidal emulsion aphrons".JOURNAL OF MEMBRANE SCIENCE 281.1-2(2006):685-691. |
入库方式： OAI收割
来源：过程工程研究所
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