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Related Concept Videos

Hydrogen Bonds00:26

Hydrogen Bonds

109.5K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
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Cohesion01:07

Cohesion

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Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
44.9K
Intermolecular Forces03:13

Intermolecular Forces

62.9K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
62.9K
Detergent Purification of Membrane Proteins01:18

Detergent Purification of Membrane Proteins

5.5K
Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
5.5K
Hydrogen Bonds01:04

Hydrogen Bonds

11.9K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
11.9K
Ion Exchange01:17

Ion Exchange

1.6K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.6K

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Related Experiment Video

Updated: May 3, 2026

Preparation of DNA-crosslinked Polyacrylamide Hydrogels
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Preparation of DNA-crosslinked Polyacrylamide Hydrogels

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Self-Polymerized Tough and High-Entanglement Zwitterionic Functional Hydrogels.

Luxing Wei1, Yang Yang2, Xiaoyong Qiu3

  • 1Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, Shandong, 250061, China.

Small (Weinheim an Der Bergstrasse, Germany)
|September 25, 2024
PubMed
Summary
This summary is machine-generated.

This study developed a robust zwitterionic hydrogel using dopamine polymerization. The new sulfobetaine methacrylate-dopamine hydrogel (SBMA-DA-PE) shows significantly enhanced mechanical strength and self-healing properties for biomedical uses.

Keywords:
high entanglementsalt responsiveself‐initiated polymerizationtoughnesszwitterionic hydrogels

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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Polymer Chemistry

Background:

  • Zwitterionic hydrogels offer excellent biocompatibility and antifouling characteristics for biomedical applications.
  • The inherent low toughness and strength of single-network zwitterionic hydrogels restrict their practical use.
  • Developing mechanically robust and functional zwitterionic hydrogels is crucial for advancing biomedical technologies.

Purpose of the Study:

  • To synthesize a novel zwitterionic hydrogel with superior mechanical properties and multi-functionality.
  • To investigate the potential of dopamine oxidative radical polymerization in creating high-performance hydrogels.
  • To explore the applicability of the developed hydrogel in advanced biomedical applications, including 3D scaffolds and electronic devices.

Main Methods:

  • Preparation of a sulfobetaine methacrylate-dopamine hydrogel (SBMA-DA-PE) via dopamine oxidative radical polymerization.
  • Characterization of the hydrogel's mechanical properties, including tensile and compressive stress/strain.
  • Evaluation of self-healing capabilities, fatigue resistance, swellability, antifouling properties, printability, and conductivity.

Main Results:

  • The SBMA-DA-PE hydrogel demonstrated a 5-fold increase in tensile fracture stress and a 10-fold increase in compressive fracture stress compared to regular zwitterionic hydrogels.
  • Achieved excellent mechanical properties with maximum compressive stress ≥4.85 MPa and strain ≥90%.
  • Exhibited remarkable self-healing, fatigue resistance, low swellability, good antifouling properties, printability, and conductivity.

Conclusions:

  • The developed SBMA-DA-PE hydrogel overcomes the mechanical limitations of traditional zwitterionic hydrogels.
  • Dopamine-mediated polymerization provides a viable route to high-performance, multi-functional zwitterionic materials.
  • The unique properties of SBMA-DA-PE hydrogel open new avenues for creating advanced biological 3D scaffolds and electronic devices.