People are familiar with jelly and contact lenses and other items are made of hydrogel. U.S. researchers reported in a new issue of Nature magazine in the United Kingdom that they have developed hydrogels with high elasticity and high toughness, and they are expected to be used in the production of artificial cartilage and other medical devices in the future.
Hydrogel is a generic name for a group of substances that can absorb a large amount of water and present jelly-like substances. One of its great advantages is that it does not cause rejection reactions when put into the body. However, most hydrogels have poor elasticity and toughness, which limits the use of hydrogels. Range of application.
Researchers at Harvard University and other institutions have developed highly elastic and highly resilient hydrogels composed of alginates and polyacrylamides . The hydrogels formed by these two substances alone are not very elastic, but if they are mixed in a certain proportion and added with water, a new type of hydrogel will be obtained.
Although about 90% of the new hydrogel is water, its elasticity is extremely strong and can be stretched to more than 20 times its original length, and it can also be restored to its original shape afterwards. Its toughness is also very good, breaking a piece of such hydrogel, it takes energy and almost a piece of natural rubber.
Researchers say that such elastic and resilient hydrogels are not the people's impression that a jelly can be easily cut open. Its performance has met the requirements of replacing cartilage and other tissues and can be used to manufacture related medical equipment. For example, it can be used to make artificial discs, its performance is sufficient to withstand the stretching and compression of the spine. (Reporter Huang Hao)
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