期刊論文
| 學年 | 98 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2010-01-01 |
| 作品名稱 | Studies on the self-assembly of neat DBS and DBS/PPG organogels |
| 作品名稱（其他語言） | |
| 著者 | Lai, Wei-Chi; Wu, Chia-Hui |
| 單位 | 淡江大學化學工程與材料工程學系 |
| 出版者 | Hoboken: John Wiley & Sons, Inc. |
| 著錄名稱、卷期、頁數 | Journal of Applied Polymer Science 115(2), pp.1113-1119 |
| 摘要 | The self-assembly behavior of neat 1,3:2,4-dibenzylidene-d-sorbitol (DBS) and DBS/poly(propylene glycol) (PPG) organogels has been investigated by scanning electron microscopy, polarizing optical microscopy, and rheological measurements. DBS molecules are capable of self-organizing into fibrils and exhibit the birefringent spherulitic textures during cooling from the melt. On the other hand, DBS can self-assemble into a fibrillar network in PPG to produce organogels. DBS/PPG organogels also reveal a spherulite-like morphology. When a small amount of DBS is dispersed into a PPG matrix, we find that the spherulite sizes are much smaller than those of neat DBS. This is because the dilution of DBS causes DBS to self-assemble in PPG at a lower temperature. Therefore, more nucleation sites and smaller spherulite sizes are found in the DBS/PPG organogel system. The rheological measurements demonstrate that the elastic modulus (G′) in DBS/PPG organogels increases as the DBS concentration increases. However, the increase in G′ is less obvious, as the DBS content exceeds 3 wt %. suggesting that the DBS networks become saturated. Also, it is found that these organogels require a certain period of time to reach thermodynamic equilibrium, depending on DBS concentrations. |
| 關鍵字 | self-assembly; gels; spherulite |
| 語言 | en |
| ISSN | 0021-8995; 1097-4628 |
| 期刊性質 | 國外 |
| 收錄於 | SCI EI |
| 產學合作 | |
| 通訊作者 | Lai, Wei-Chi |
| 審稿制度 | |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/53720 ) |