| 查看: 422 | 回复: 2 | ||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||
dz4135木虫 (正式写手)
|
[求助]
请大神帮忙翻译成英文，着急，急急急，拜谢！1
|
|
|
3.3 球形药内部孔隙的孔径均匀性控制方法 3.3.1 乳化发泡阶段改善孔结构的途径 通过在各个工艺环节对物料进行取样和结构分析，揭示出了影响成品颗粒中孔结构的影响因素，以及孔结构的形成和发展过程。其中，乳化发泡阶段的分散均匀性和影响最终孔结构的重要因素。由于该阶段是一个通常的乳化分散过程，分散相的分散程度和均匀性主要决定于剪切强度和表面活性剂的作用。通过在乳化发泡过程优化表面活性剂的品种和用量，得到了分散均匀性较高的高分子溶胶，经过分散成球和溶剂驱除后得到了孔隙直径分布均匀的样品。典型的孔结构分布情况如图9所示，通过控制乳化发泡阶段的分散强度和乳液的稳定性可以将内部孔结构的尺度控制到微米级水平。 3.3.2 分散成球阶段改善孔结构的途径 在分散成球过程连续取样，对其内部孔结构分析表明，高分子乳液的二次分散对其内部孔结构基本没有影响。在分散成球阶段只要保持相对稳定的剪切力，就可以保证球形颗粒内部结构不被破坏。 3.3.3 溶剂驱除阶段改善孔结构的途径 在该阶段影响孔结构均匀性的主要因素包括溶剂驱除的方式和溶剂驱除速度。当溶剂去除速度偏快或在较高的真空度条件下进行驱溶时，典型的颗粒孔结构分布情况如图10所示，造成内部孔隙不均匀或孔隙合并的原因在于颗粒内部的溶剂发生了快速气化。当溶剂驱除时间延长到3小时以上，并且控制升温速度平稳情况下，可以保证前期形成的孔隙结构完整地保留下来。 |
回复此楼» 猜你喜欢
表哥与省会女结婚，父母去帮带孩子被省会女气回家生重病了
已经有12人回复
-
依托企业入选了国家启明计划青年人才。有无高校可以引进的。
已经有14人回复
-
江汉大学解明教授课题组招博士研究生/博士后
已经有3人回复
-
AI 太可怕了，写基金时，提出想法，直接生成的文字比自己想得深远，还有科学性
已经有11人回复
-
依托企业入选了国家启明计划青年人才。有无高校可以引进的。
已经有11人回复
dz4135
木虫 (正式写手)
- 应助: 5 (幼儿园)
- 金币: 5623.4
- 散金: 270
- 红花: 12
- 帖子: 904
- 在线: 1242.9小时
- 虫号: 2084292
- 注册: 2012-10-24
- 性别: GG
- 专业: 应用高分子化学与物理
3楼2013-04-12 20:30:19
【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
爱与雨下: 金币+1 2013-04-15 19:34:09
sltmac: 金币+15 2013-05-24 09:17:04
爱与雨下: 金币+1 2013-04-15 19:34:09
sltmac: 金币+15 2013-05-24 09:17:04
| 3.3) the internal pore spherical propellant pore uniformity control method3.3.1) approaches to improving pore structure emulsion foaming stageIn each process on the material analysis sampling and structure, reveal the factors that affect the finished pellet in the pore structure and pore structure, formation and development processes. Among them, emulsification foaming stage dispersible uniformity and influence the pore structure of the important factors. Because the stage is usually an emulsifying process, the degree of dispersion phase and uniformity depends mainly on the shear strength and the role of surfactant. The varieties and dosage of emulsifying and foaming process optimization of surface active agent, the dispersed polymer sol of high, after dispersed into balls and solvent to get the pore diameter distribution of the sample. The typical pore structure distribution as shown in Figure 9, the stability of emulsion dispersion strength and control emulsion foaming stage can control the internal pore structure of the scale to the micron level.3.3.2) dispersed into ways of improving pore structure ball stageIn the decentralized palletizing process continuous sampling, according to an analysis of the internal pore structure of polymer emulsion, two dispersed on the internal pore structure does not affect the basic. In the dispersed into the ball as long as keep the shear stress is relatively stable, can ensure that the internal structure of spherical particles was not damaged.3.3.3) pathway hole structure to improve solvent drive stageIn this stage the main factors affecting the pore structure uniformity including method and solvent away from speed. When the solvent removal rate Piankuai or flooding solution in high vacuum conditions, typical of the pore structure of particles distribution as shown in Figure 10, the cause of the inner pore is not uniform or pore combination is the rapid gasification particles inside the solvent. When the solvent from time to 3 hours or more, and control the heating speed is stable, can ensure that the pore structure of early formation and intact. |
2楼2013-04-12 20:18:20