How amid bond in acrylamid can increase equlibrum swelling ratio of hydrogel base pva/mba/pei/aps/amps?
Best insight from top research papers
The amid bond in acrylamide plays a crucial role in enhancing the equilibrium swelling ratio of hydrogels based on PVA/MBA/PEI/APS/AMPS. Research has shown that the swelling behavior of hydrogels is significantly influenced by the composition and structure of the polymers used. Acrylamide, as a key component, contributes to the swelling properties of the hydrogel by forming crosslinks with other monomers like MBA, leading to increased swelling capacity. Additionally, the presence of acrylamide in the polymer matrix affects the spatial homogeneity of the hydrogel, further impacting its swelling behavior. Therefore, the amid bond in acrylamide plays a vital role in promoting the equilibrium swelling ratio of hydrogels by influencing the crosslinking density and overall structure of the polymer network.
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
4 Citations | The amid bond in acrylamide increases the equilibrium swelling ratio of hydrogels by providing more sites for hydrogen bonds, leading to enhanced water absorption capacity near phase transition. |
| The amid bond in acrylamide can influence the equilibrium swelling ratio of hydrogels by altering the molar ratio of anionic to cationic moieties, affecting polyampholyte behavior and swelling capacity. | |
| Increasing the amid bond in acrylamide can enhance the equilibrium swelling ratio of hydrogels due to the formation of imide functional groups, as seen in P(AAm-MBAA) hydrogels. | |
| The incorporation of amid bonds in acrylamide-based hydrogels can increase the equilibrium swelling ratio, as shown in the study with Montmorillonite/Aam hydrogels exhibiting higher swelling compared to other hydrogel types. | |
23 Jul 2021 1 Citations | Not addressed in the paper. |
Related Questions
Why is swelling important in hydrogels bone repair?5 answersSwelling in hydrogels is crucial for bone repair as it allows for the absorption of water, mimicking the high water content of native tissue, which is beneficial for tissue regeneration. Additionally, swelling properties of hydrogels can be leveraged to control intraspinal pressure after spinal cord injury, aiding in injury management. Furthermore, the ability of hydrogels to swell is essential for loading antibacterial drugs and biomolecules, which is important for treating infected bone defects while promoting bone repair. Swelling also enhances the mechanical properties of hydrogels, making them suitable for use as scaffolds in tissue engineering applications, including bone regeneration. Therefore, swelling plays a vital role in ensuring the effectiveness of hydrogels in bone repair by facilitating water absorption, drug loading, and mechanical support.
What factors affect the swelling behavior of polymer gels?5 answersThe swelling behavior of polymer gels is influenced by various factors such as the presence of macromolecules in the surrounding liquid, the type of functional groups incorporated into the gel structure, the temperature, pH, and ionic strength of the solution, and the degree of finite extensibility in the elastic free energy of the gel. Additionally, the kinetics and degree of swelling depend on the physicochemical properties of both the polymer network and the aqueous solvent. The swelling equilibrium can be affected by the reduction in osmotic pressure and changes in effective solvent quality due to the presence of macromolecules within the gel network. Understanding these factors is crucial for tailoring the swelling behavior of polymer gels for various applications such as controlled drug delivery systems and sensors.
What are the factor that influences the swelling degree of hydrogels?4 answersThe swelling degree of hydrogels is influenced by several factors. The network variables, such as polyethylene glycol (PEG) molecular weight and weight fraction, are positively correlated with the swelling ratio. The presence of ions, such as those found in phosphate-buffered saline (PBS), has a significant influence on the equilibrium water content and swelling ratio of hydrogels. The stiffness and toughness of hydrogels can be improved by reinforcing them with hydrogel microparticles, which affects the connectivity and stiffness of the fully swollen hydrogels. The elastic modulus and swelling of superabsorbent hydrogels (SAHs) are affected by temperature, pH, and ionic strength of the solution. The presence of dissolved macromolecules in the background liquid can reduce the degree of swelling of hydrogels by exerting an additional external osmotic pressure. The concentrations of monomer, crosslinking agent, and reinforcing agent also affect the swelling and viscoelastic properties of hydrogels.
What are the health effects of acrylamide?5 answersAcrylamide is a harmful chemical that is produced during the cooking methods of certain carbohydrate-rich foods at high temperatures. It has been reported to cause various health problems, including neurotoxicity, carcinogenicity, genotoxicity, reproductive toxicity, immunotoxicity, hepatotoxicity, cardiotoxicity, hematotoxicity, nephrotoxicity, and developmental toxicity. Acrylamide is formed as a by-product of the Maillard reaction in high-carbohydrate foods prepared at high temperatures. The primary concern about human exposure to acrylamide was in the occupational setting, where it was found to be toxic to the nervous system and a carcinogen in laboratory animals. Acrylamide has been classified as a carcinogen in humans, leading to progressive degeneration of the nervous system. Acrylamide exposure can also lead to neurodegenerative disorders like Alzheimer's and Parkinson's. Additionally, acrylamide has been shown to induce cytotoxic, genotoxic, and carcinogenic effects on lung cells, potentially increasing the risk of lung cancer.
How does crosslinking affect swelling ratio of a hydrogel?4 answersCrosslinking affects the swelling ratio of a hydrogel. In the case of alginate-based hydrogel microspheres, the combination of external crosslinking using calcium chloride and internal crosslinking using transglutaminase allows for tailoring the swelling behavior of the hydrogel. The swelling ratio of hydrogel polymers prepared from polyvinyl alcohol (PVA) and urea decreased with increasing concentration of the crosslinking agent glutaraldehyde. Crosslinked chitosan hydrogels synthesized with different crosslinking agents showed varying swelling ratios, with the hydrogel crosslinked by acetaldehyde exhibiting the highest swelling ratio. The ability of hydrogels synthesized using corncobs cellulose and acrylate-acrylamide to swell was influenced by the concentration of cellulose and acrylamide, with an optimum swelling ability observed at a cellulose ratio of 10% and an acrylamide ratio of 16%. The nature of the chemical crosslinker used in cationic hydrogels based on N-acryloyl-N′-propyl piperazine affected the swelling and solubility parameter of the hydrogels, with hydrogels containing a hydrophilic crosslinker exhibiting a higher solubility parameter.
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.