カチオン型ポリアクリラミド水溶液の粘度特性
Mamdouh T Ghannam1, Mohamed Y E Selim2, Ahmed Thaher2
1Department of Chemical and Petroleum Engineering, College of Engineering, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates.
Polymers
|February 13, 2026
まとめ
この研究では,カチオンのポリアクリルアミド (CPAA) 溶液が200s−1未満のシーア薄化行動を示し,より高い速度でシーア厚化に移行することを示しています. 粘性はCPAA濃度とともに増加するが,温度と電解質の存在によって減少する.
科学分野:
- ポリマーサイエンスの科学
- 整形外科医 整形外科医 整形外科医 整形外科医
- 材料科学 材料科学とは
背景:
- カチオン型ポリアクリルアミド (CPAA) は,流体改変を必要とする工業用途で広く使用されています.
- CPAA溶液のリオロギーを理解することは,さまざまな条件下でパフォーマンスを最適化するために不可欠です.
- 高塩分と高温の環境は,ポリマー溶液の安定性や流動性に対して大きな課題をもたらす.
研究 の 目的:
- CPAA溶液のレオ学的性質を調査する.
- CPAA濃度,切断率,温度,電解質 (NaCl,CaCl2) が粘度および流量性能に与える影響を評価する.
- シーア薄化からシーア厚化行動への移行の臨界シーア速度を決定する.
主な方法:
- アントン・パアの回転レオメーターを使用して,フロー行動分析を行いました.
- 500-5000ppmの濃度範囲で試験されたCPAA溶液.
- 調査した温度は20°C間隔で20°Cから80°Cで,電解質濃度は0~10Wt%のNaClとCaCl2.
主要な成果:
- CPAA溶液は200s−1未満の非ニュートン式切削薄化行動を示し,この速度の上では切削厚化に移行する.
- 動的粘性は,CPAA濃度とともに著しく増加する (例えば,10秒−1で500〜5000ppmに対して2.4〜33.8mPa·s).
- 温度の上昇に伴い粘度が大幅に低下する (例えば,温度20°Cから80°Cまでの10秒−1で5000ppmで33.8から18.3mPa·s),NaClとCaCl2の存在により減少する.
結論:
- CPAAの溶液は,濃度,切断率,温度,電解質に敏感な複雑なレオロジック行動を示しています.
- 識別された切断速度の移行は,産業環境における流動性能を予測するために重要である.
- 発見は,高塩分度および高温のアプリケーションに挑戦するCPAA製剤の最適化のための貴重な洞察を提供します.
キーワード:
カルシウム塩化物とはカチオン性ポリアクリルアミド切断率 (shear rate) とは,切断率 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とは,切断速度 (shear rate) とはシェアストレスのストレス塩化ナトリウム塩化物粘度 粘度 粘度 粘度 粘度 粘度 粘度 粘度さらに関連する動画
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