Flexible polymer-based PTC material for normal-temperature thermal control, and preparation method thereof

Abstract

The invention discloses a flexible polymer-based PTC material for normal-temperature thermal control, and a preparation method thereof. The material comprises a block copolymer, a phase change matrixand a conductive filler, wherein a mass of the block copolymer to the phase change matrix is (20:80) to (40:60), and the mass proportion of the conductive filler is less than 80%. The block copolymeris added to a composite material of paraffin and graphite powder or conductive carbon black as a as a supporting material, and the formula of all components is adjusted to make the prepared material have a PTC effect generating Curie temperature of -10-40 DEG C, have good flexibility and realize film formation, so the material can be applied to the fields of active temperature control and other normal-temperature thermal controls of electronic devices, and makes up for a main deficiency that existing normal-temperature thermal control PTC materials are not flexible and cannot be processed intofilms.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to View More

AI Technical Summary

Benefits of technology

This patented technology allows for creation of thermally controlled switches that have improved performance compared with existing ones due to its ability to change their resistance based on changes made within certain temperatures (T). These switches also allow for easier manufacturing process than previous designs because they only require two components - one being an organic compound called poly(styrene)-grafted polystyreneglycerate) resin mixed into another type of plastic known as liquid crystal elastomer), which makes it easy to mold them around tiny particles inside. By adding these blockscopopolymers along with other supporting materials like paraffine wax/graphite powders or conductivity carbon Black, this new composition becomes more flexible but still maintains excellent properties over time when heated above 100 degrees Celsius.

Problems solved by technology

This patented technical solution described by Cathayne et al describes how certain types of plastic called thermally sensitive semiconducers made up of crystal particles that expand upon exposure to specific temperatures show negative values indicating their ability to absorb energy during expansion. These plates may then undergo transformation back again after they reach these conditions - causing another increase in electrical resistance over time. By measuring both voltage levels and ambient air temperatures accurately, we found out what caused instabilities and leaks within the device' s circuitry. Additionally, there was no way to use existing methods like liquid nitrogen injection inside the devices without affecting their properties.

Images