| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-05-25 |
| タイトル |
|
|
タイトル |
Flocculation Mechanism and Microscopic Statics Analysis of Polyacrylamide Gel in Underwater Cement Slurry |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
|
|
言語 |
en |
|
キーワード |
adsorption |
| キーワード |
|
|
言語 |
en |
|
キーワード |
entanglement |
| キーワード |
|
|
言語 |
en |
|
キーワード |
lubrication |
| キーワード |
|
|
言語 |
en |
|
キーワード |
microscopic statics analysis |
| キーワード |
|
|
言語 |
en |
|
キーワード |
PAM |
| 資源タイプ |
|
|
資源タイプ |
journal article |
| アクセス権 |
|
|
アクセス権 |
open access |
| 著者 |
Lu, Hao
Dai, Bo
李, 春鶴
Wei, Hua
Wang, Jinhui
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Zeta potential testing, Fourier infrared spectroscopy, and total organic carbon analysis were employed in this manuscript to explore the flocculation mechanism of polyacrylamide (PAM) on slurry with a high content of polycarboxylate ether (PCE). Through the combination of assessments of chemical bond shifts, adsorption indicators, and intrinsic viscosity of high-molecular-weight polymer systems, the microscale flocculation mechanisms of different PAM dosages in cement suspensions were elucidated, showcasing stages of “adsorption–lubrication–entanglement”. Initially (PAM < 0.3%), with PAM introduction, the polymer primarily underwent adsorption interactions, including hydrogen bonding between the ester group, amine group, and water molecules; chelation between the ester group and Ca2+ and Al3+ on the cement surface; and bridging between PAM’s long-chain structure and cement particles. As the PAM content increased, the cement particles’ adsorption capacity saturated (PAM < 0.67%). The entropy loss of polymer conformation could not be offset by adsorption energy, leading to its exclusion from the interface and depletion attractive forces. Slurry movement shifted from inter-particle motion to high-molecular-weight polymer sliding in interstitial fluid, forming a lubrication effect. With further PAM content no less than 0.67%, the polymer solution reached a critical entanglement concentration, and the contact of the rotation radius of the long-chain molecules led to entanglement domination. By introducing bridging adsorption, depletion attraction, and entanglement forces, the cohesion of cement-based polymer suspensions was subsequently determined. The results showed a linear correlation between cohesion and PAM concentration raised to powers of 0.30, 1.0, and 0.75 at different interaction stages, and a multiscale validation from microscopic flocculation mechanisms to macroscopic performance was finally completed through a comparative analysis with macroscopic anti-washout performance. |
|
言語 |
en |
| bibliographic_information |
en : Gels
巻 11,
号 2,
p. 99,
発行日 2025-02-01
|
| 出版者 |
|
|
出版者 |
MDPI AG |
|
言語 |
en |
| ISSN |
|
|
収録物識別子タイプ |
EISSN |
|
収録物識別子 |
23102861 |
| item_10001_relation_14 |
|
|
関連タイプ |
isVersionOf |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.3390/gels11020099 |
| 権利 |
|
|
権利情報 |
© 2025 by the authors. |
|
言語 |
en |
| 出版タイプ |
|
|
出版タイプ |
VoR |
fulltext (5 MB)
.png)
