Electret and electrostatic induction conversion device comprising the same
View Patent ↗To provide an electret whose surface potential is improved and an electrostatic induction conversion device comprising the same, an electret is formed by spin-coating a fluorine-containing polymer composition for coating which contains a fluorine-containing polymer having a ring structure in its main chain, a silane coupling agent, an aprotic fluorine-containing solvent, and a fluorine-containing alcohol as a protic fluorine-containing solvent on a copper substrate and baking it.
1. An electret comprising:
a mixture of a fluorine-containing polymer having a carboxyl group in an end of its main chain or in its side chain and a ring structure in its main chain, and a silane coupling agent having an amino group or an epoxy group; or
a mixture of a fluorine-containing polymer having an ester group in an end of its main chain or in its side chain and a ring structure in its main chain, and a silane coupling agent having an amino group or an aminophenyl group.
2. The electret according to claim 1 , wherein the fluorine-containing polymer having a ring structure in its main chain includes a carboxyl group as an end group.
3. The electret according to claim 1 , wherein the silane coupling agent is a silane compound, and the silane coupling agent is bonded to the carboxyl group of the fluorine-containing polymer.
4. The electret according to claim 1 , wherein the fluorine-containing polymer having a ring structure in its main chain is a fluorine-containing aliphatic polymer having a ring structure in its main chain.
5. The electret according to claim 1 , wherein the fluorine-containing polymer having a ring structure in its main chain is a fluorine-containing aliphatic polymer having a ring structure including an ethereal oxygen atom in its main chain.
6. An electrostatic induction conversion device comprising the electret according to claim 1 .
7. An electrostatic induction conversion device comprising the electret according to claim 2 .
8. An electrostatic induction conversion device comprising the electret according to claim 3 .
9. An electrostatic induction conversion device comprising the electret according to claim 4 .
10. An electrostatic induction conversion device comprising the electret according to claim 5 .