▎ 摘　　要

NOVELTY - Non-conductive substrate is partially coated on at least one side with a paint comprising reduced graphene oxide having a surface area below 300 m2. gr-1 and at least one thermosetting polymer. USE - Non-conductive substrate for detecting leak or strain deformation (all claimed) used for mining industry, electronic industry, plastic piping systems, clothing industry and engineering plastics used in automotive or aerospace industry. ADVANTAGE - The non-conductive substrate is very sensitive to strain and is capable of monitoring a state of products for early detecting a defect that occurs in an extreme situation such as a natural disaster (e.g. earthquake) or in a usual situation such as wear which improves the life time of the substrates. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for manufacturing coated non-conductive substrate, which involvs mixing of reduced graphene oxide, a thermosetting monomer, a curing agent and optionally a solvent, depositing the mixture on a non-conductive substrate and curing the mixture; (2) a method for detecting a leak with the coated non-conductive substrate, which involves applying electric voltage to the coated non-conductive substrate using an electronic system and detecting leak when the electrical circuit is formed in the non-conductive substrate; and (3) a method for detecting a strain deformation with the coated non-conductive substrate, which involves applying an electric voltage to the non-conductive substrate using an electronic system and measuring the electrical resistance variation after deformations of the coated non-conductive substrate.