| 三聚氰胺-甲醛系凝胶老化过程中的体积收缩影响因素 |
| |
| 引用本文： | 张勇,任洪波,张林,万小波.三聚氰胺-甲醛系凝胶老化过程中的体积收缩影响因素[J].强激光与粒子束,2007,19(8):1299-1302. |
| |
| 作者姓名： | 张勇 任洪波 张林 万小波 |
| |
| 作者单位： | 1. 中国工程物理研究院 激光聚变研究中心， 四川 绵阳 621900; 2. 西南科技大学 材料科学与工程学院， 四川 绵阳 621002 |
| |
| 基金项目： | 国防重点实验室基金;国家高技术研究发展计划(863计划) |
| |
| 摘 要： | 介绍了三聚氰胺-甲醛凝胶老化过程的溶剂效应及其对体积收缩的影响。从凝胶的离浆-溶胀平衡以及溶剂效应等两个方面对湿凝胶老化过程中的体积收缩作了分析，通过测量形状规则的湿凝胶在溶剂交换和老化过程中的体积变化研究湿凝胶组成、交换溶剂的成分及步骤对凝胶体积收缩的影响。结果表明：控制交换溶剂的组成能显著改善湿凝胶后处理过程中的体积收缩。合适的湿凝胶交换步骤是先使用凝胶体内液体和目标溶剂的混合溶剂进行交换，逐次增大目标溶剂的含量，直至最后使用纯目标溶剂进行交换，即可获得体积收缩较小的湿凝胶体系。
|
| 关 键 词： | 三聚氰胺 甲醛 老化 体积收缩 |
| 文章编号： | 1001-4322（2007）08-1299-04 |
| 收稿时间： | 2007/2/28 |
| 修稿时间： | 2007-02-28 |
Solvent effect on volume shrinkage of Melamine-Formaldehyde gel in aging process |
| |
| ZHANG Yong,REN Hong-bo,ZHANG Lin,WAN Xiao-bo.Solvent effect on volume shrinkage of Melamine-Formaldehyde gel in aging process[J].High Power Laser and Particle Beams,2007,19(8):1299-1302. |
| |
| Authors: | ZHANG Yong REN Hong-bo ZHANG Lin WAN Xiao-bo |
| |
| Institution: | 1. Research Center of Laser Fusion, CAEP, P.O.Box 919-987, Mianyang 621900, China;2. School of Material Science and Engineering, Southwest University of Science and Technology, Mianyang 621002, China |
| |
| Abstract: | Solvent effect and volume shrinkage ratio in melamine-formaldehyde gel aging process were discussed.Volume shrinkage ratio was analyzed from two aspects,the aging-swelling balance and solvent effect.The results implied that the solution compositon(water and ethanol) would control the volume shrinkage ratio in aging process.Appropriate exchange steps for wet gel is that the mixture of the liquid in the gel and target solvent(ethand) is firstly used and the target solvent's content gradually rises until it is pure target solvent,then the MF aerogel which has little volume shrinkage is obtained. |
| |
| Keywords: | Melamine Formaldehyde Aging Volume shrinkage |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《强激光与粒子束》浏览原始摘要信息 |
| 点击此处可从《强激光与粒子束》下载免费的PDF全文 |
