All the discussions and research on graphene currently attempt to create composite materials by using the pliable properties of the material. It has been applied to wearable and flexible electronics. This network has also done a lot of coverage, but most of the current graphene composites. There are hard and inflexible problems.
According to reports, the research team from Ireland recently revealed that the combination of graphene and children's toy Silly Putty (color plasticine) instantly ignited the passion of the nanomaterial community. The resulting new composite materials have broad application prospects, and the research team has promised to manufacture high-sensitivity strain gauge sensors for the medical diagnostics industry.
Published in the journal Science, sponsored by the Irish Science Foundation, the AMBER Materials Research Center, based at Trinity College Dublin, found that if you add nanosheets to low-viscosity materials like plasticine, Its electromechanical performance will undergo tremendous changes. You will suddenly find that you have an extremely sensitive strain gauge sensor.
When you apply a voltage to a plasticine that has been infused with graphene, even a very slight touch can make a very large change in current. And this is the principle of strain gauge sensors.
Jonathan Coleman, a professor at Dublin Trinity College, who is in charge of the project, said: "If you stretch the length of the plasticine containing graphene by 1%, the current will be adjusted by a factor of 5. Very small mechanical changes will produce huge current changes."
In a number of tests on graphene plasticine, the researchers placed the conforming material on the person's chest and neck to measure breathing, pulse, and blood pressure. The results show that for strain gauge sensors and pressure sensors, this composite has unprecedented sensitivity, hundreds of times more than existing sensors.
“We found that when you combine graphene with such extremely soft polymers, they are not only fully qualified for the strain sensor, but also a few light-years away from the sensors we create today.†Coleman says: “And, these properties are in fact closely related to these soft polymers.â€
Surprisingly, there has been little research on the combination of graphene and low viscosity polymers in this field. This is mainly because of the misunderstanding of thinking, trying to use the soft properties of graphene to make the material softer. Therefore, in the previous attempted fusion, the hard polymer was often selected, which was not expected after the introduction of graphene, and even some composite materials became harder.
Despite attempts to integrate graphene and soft polymers, graphene has not previously been embedded in soft polymers such as plasticine.
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