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How polar hydroxyl and unic bond groups prevent swelling of hydrogel in oil ?

Self-healing hydrogels

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Polar hydroxyl and unic bond groups can prevent the swelling of hydrogels in oil by competing in hydrogen bonding interactions, thereby reducing the gelling ability of phase-selective organogelators (PSOGs) . This competition in hydrogen bonding by the carrier solvent can lead to decreased gelling ability of PSOGs, as observed in previous studies . However, minimizing the amount of polar carrier solvent used can substantially enhance the gelling ability of PSOGs, rather than weakening it . Additionally, the use of hydrogels in wellbore environments, where the hydrogel composition includes polar groups like hydroxyl, allows for manipulation through environmental factors such as temperature, pH, and electronic fields, enabling the hydrogel to swell in response to specific stimuli .

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Journal Article•DOI Polar Solvent-Induced Unprecedented Supergelation of (Un)Weathered Crude Oils at Room Temperature Juntong Li, Yanping Huo, Huaqiang Zeng - Show less +2 more 15 Jun 2018-Langmuir 21 Citations	Not addressed in the paper.
Journal Article•DOI A Solvent-Exchange Strategy to Regulate Noncovalent Interactions for Strong and Antiswelling Hydrogels Liju Xu, Shan Gao, Qirui Guo, Chen Wang, Yan Qiao, Dong Qiu - Show less +5 more 01 Dec 2020-Advanced Materials 146 Citations	Polar hydroxyl and unic bond groups regulate noncovalent interactions in hydrogels, enhancing stiffness, toughness, and antiswelling properties, preventing swelling in oil.
Open access•Journal Article•DOI Under pressure: Hydrogel swelling in a granular medium. Jean-François Louf, Nancy B. Lu, Margaret G. O'Connell, H. Jeremy Cho, H. Jeremy Cho, Sujit S. Datta - Show less +5 more 01 Feb 2021-Science Advances 10 Citations	Not addressed in the paper.
Patent Hydrogel for use in downhole seal applications Li Yanmei, Jian Zhou - Show less +1 more 28 Jul 2006 88 Citations	Polar hydroxyl and unic bond groups in the hydrogel composition allow for controlled swelling in response to environmental factors like temperature, pH, and oil/water ratio, preventing swelling in oil.
Open access•Journal Article•DOI Under pressure: Hydrogel swelling in a granular medium Jean-François Louf, Nancy B. Lu, Margaret G. O'Connell, H. Jeremy Cho, H. Jeremy Cho, Sujit S. Datta - Show less +5 more 21 Mar 2021-arXiv: Soft Condensed Matter 35 Citations	Not addressed in the paper.

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Related Questions

What are properties of hybrid hydrogels?5 answersHybrid hydrogels exhibit a variety of properties that make them promising materials for biomedical applications. These properties include tunable mechanical and adhesive properties, responsiveness to external stimuli like electric and magnetic fields, enhanced antibacterial properties, antioxidant capabilities, and the ability to scavenge reactive radicals. Additionally, hybrid hydrogels can demonstrate strong compressive capacity, low friction coefficients, and excellent lubricity, making them suitable for applications in cartilage repair and replacement. Furthermore, the compositional versatility of hybrid hydrogels allows for fine-tuning of mechanical properties through dynamic, non-covalent cross-linking, enabling specific targeting for various tissue engineering applications such as blood vessels and cartilage regeneration. Overall, the multifunctionality and diverse properties of hybrid hydrogels position them as attractive platforms for tissue engineering, drug delivery, and wound healing applications.

How polar hydroxyl groups prevent swelling of hydrogel in oil?4 answersPolar hydroxyl groups in hydrogels play a crucial role in preventing swelling in oil due to their interactions with the oil phase. The presence of these hydroxyl groups, which are typically found in hydrogel structures, leads to an affinity towards water rather than oil, causing the hydrogel to resist swelling in an oil environment. This phenomenon is particularly relevant in applications such as oil recovery and wellbore sealing, where hydrogels need to maintain their structural integrity and functionality in the presence of oil. The hydrogel's response to environmental factors like temperature, pH, and electronic fields can also influence its swelling behavior, showcasing the dynamic nature of hydrogel interactions in different media.

Is there any study about the spreading time of oil on hydrogel?4 answersThere is no study specifically mentioned in the abstracts about the spreading time of oil on hydrogel.

What are the types of hydrogen bonds that are involved in the formation of hydrogels?5 answersHydrogels are formed through the formation of hydrogen bonds. In the construction of multi-functional hydrogels, multiple hydrogen bonds are formed between polyacrylamide and imidazolidinyl urea (IU). Humic acid (HA) works as a crosslinking agent to form hydrogen bonds with polyvinylpyrrolidone (PVP) in the construction of adhesive hydrogels. Physical and chemical cross-linked hydrogels are formed through the presence of a large number of hydrogen bonds between N, N'-Methylenebisacrylamide (MBA)-grafted starch (MBAS) and sorbitol. The hierarchical hydrogen bond system in hydrogels consists of weak hydrogen bonds between N,N-dimethylacrylamides (DMAA) and acrylic acids (AAc), as well as strong multiple hydrogen bonds between 2-ureido-4[1H]-pyrimidinone units. The integration of 2-ureido-4[1H] pyrimidinone (UPy) units into the macromolecular chains of a zwitterionic polymer forms self-healing hydrogels.

How can hydrogels be used to clean up oil spills?5 answersHydrogels can be used to clean up oil spills by congealing the oil and facilitating its removal from the environment. Phase-selective organogelators (PSOGs) have been developed as a promising tool for oil spill remediation. These PSOGs can gel the oil in the presence of water/seawater, accelerating oil removal and reducing environmental impacts. Additionally, cellulose hydrogels have shown potential for removing water from diesel and biodiesel fuels. Different methods for hydrogel preparation, crosslinking induction, and drying were analyzed, and the hydrogels synthesized with cellulose and epichlorohydrin showed the best performance in removing water from the fuels. Furthermore, aerogels made from paper waste, crosslinking starch, and cellulose acetate have been investigated as sorbents for oil spills. These aerogels have high porosity and sorption capacity, making them effective in removing crude oil, marine diesel oil, and lubricating oil from water surfaces.

How does swelling affect the properties of hydrogels?5 answersSwelling affects the properties of hydrogels by causing uniform expansion and changes in material behavior. When hydrogels swell with water, they can experience internal stresses that lead to surface instabilities, rupture, or bursting events. The degree and kinetics of swelling depend on the physicochemical properties of the hydrogel network and the solvent. The presence of dissolved macromolecules in the solvent can affect the swelling behavior by modifying the osmotic pressure and solvent-polymer interactions. Swelling can also have negative consequences in certain applications, such as tissue engineering, where volume expansion can deteriorate the mechanical properties of the hydrogel and cause undesirable pressure on surrounding tissues. In addition, confinement in soil can reduce the ability of hydrogels to swell, as the extent of swelling is determined by the competition between osmotic swelling force and confining force. Overall, understanding the effects of swelling is crucial for controlling and optimizing the properties of hydrogels in various applications.

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