Shape Memory Hydrogel based on a Hydrophobically-Modified Polyacrylamide (HMPAM)/α-CD Mixture via a Host-Guest Approach

2015 ◽  
Vol 36 (9) ◽  
pp. 845-851 ◽  
Author(s):  
Akram Yasin ◽  
Wanfu Zhou ◽  
Haiyang Yang ◽  
Huazhen Li ◽  
Yin Chen ◽  
...  
Keyword(s):  
Shape Memory ◽  
Hydrophobically Modified Polyacrylamide ◽  
Hydrophobically Modified ◽  
Modified Polyacrylamide

scholarly journals Interaction and Adsorption of Hydrophobically Modified Polyacrylamide on Silica and Asphaltene Surfaces

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Wenjie Zou ◽  
Zichuan Fang ◽  
Zhijun Zhang ◽  
Zhenzhen Lu
Keyword(s):  
Oil Recovery ◽  
Adhesion Force ◽  
Interaction Mechanism ◽  
Surface Force ◽  
Industrial Applications ◽  
Oil Sand ◽  
Continuous Adsorption ◽  
Hydrophobically Modified Polyacrylamide ◽  
Hydrophobically Modified ◽  
Modified Polyacrylamide

The adsorption of polymers affects the cost and oil recovery in oil reservoir exploitation and the flocculation effect in the treatment of oil sand tailings. The adhesion and adsorption of a hydrophobically modified polyacrylamide (HMPAM), i.e., P(AM-NaAA-C16DMAAC), on silica and asphaltene were investigated using surface force measurements, thermodynamic analysis and quartz crystal microbalance with dissipation (QCM-D) measurement. Our study indicates that HMPAM polymer has strong interaction with both silica and asphaltene. The adhesion force of HMPAM on silica was stronger than that on asphaltene surface. Consistently, the adsorption of HMPAM was also greater on silica surface, with a more rigid layer formed on the surface. For HMPAM/silica system, the attractive interaction and the strong adhesion are mainly driven by the hydrogen bonding and electrostatic interaction. For HMPAM/asphaltene system, it is mainly due to hydrophobic interaction between the long hydrocarbon chains of HMPAM and asphaltene. Furthermore, continuous adsorption of HMPAM was detected and multiple layers formed on both silica and asphaltene surfaces, which can be attributed to the hydrophobic chains of HMPAM polymers. This work has illustrated the interaction mechanism of HMPAM polymer on hydrophilic silica and hydrophobic asphaltene surfaces, which provide insight into the industrial applications of hydrophobically modified polymer.

scholarly journals Waste activated sludge (WAS) dewatering properties of an original hydrophobically modified polyacrylamide containing a cationic microblock structure

RSC Advances ◽  
2017 ◽  
Vol 7 (46) ◽  
pp. 28733-28745 ◽  
Author(s):  
Yuhao Zhou ◽  
Huaili Zheng ◽  
Baoyu Gao ◽  
Yingpeng Gu ◽  
Xiang Li ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Waste Activated Sludge ◽  
Hydrophobically Modified Polyacrylamide ◽  
The Core ◽  
Hydrophobically Modified ◽  
Modified Polyacrylamide

Chemical conditioning, as one of the core technologies used for the dewatering pretreatment of sludge, can efficiently improve the dewaterability of WAS and hence reduce the expense of the transportation and disposal of WAS.

Boundary lubricating properties of hydrophobically modified polyacrylamide

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5695-5702 ◽  
Author(s):  
Heng Su ◽  
Xiang Wang ◽  
Miao Du ◽  
Yihu Song ◽  
Qiang Zheng
Keyword(s):  
Significant Role ◽  
Boundary Lubrication ◽  
Adsorption Layer ◽  
Hydrophobically Modified Polyacrylamide ◽  
Hydrophobically Modified ◽  
Intermolecular Association ◽  
Modified Polyacrylamide ◽  
Lubricating Properties

Intermolecular association rather than the robust adsorption layer plays a significant role in boundary lubrication.

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