Patent ID: 11939338
Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A sensitivity-enhanced spiropyran composite comprising:
(a) spiropyran; and a polymer, an inorganic material or a mixture thereof covalently bound to the spiropyran thereby forming a spiropyran composite, and
(b) a sensitivity enhancing agent to improve sensitivity to mechanical stimulation, partially or totally impregnated at the inner part or the surface of the spiropyran composite which converts the spiropyran composite into a non-polar state thereby forming the sensitivity-enhanced spiropyran composite,
wherein the sensitivity enhancing agent induces isotropic expansion such that the volume ratio of the spiropyran composite prior to impregnation and the sensitivity-enhanced spiropyran composite after impregnation is 1:1.1-2.0;
wherein the sensitivity enhancing agent is selected from a non-polar solvent, an organic material, and an inorganic material and has a relative dielectric constant of 33 or less; and
wherein the sensitivity enhancing agent is impregnated by wet filtration into the spiropyran composite for 1-15 minutes.