▎ 摘　　要

NOVELTY - Obtaining carbon nanomaterial ink, comprises: (a) obtaining carbon nanotubes (CNT), through techniques e.g. chemical vapor deposition, electric arc discharge, laser ablation, plasma torch and liquid electrolysis, homogeneously suspending in water/alcohol or water/glycol; (b) obtaining cellulose microfibrils (MFC) with diameters of 20-700 nm and lengths greater than 10 mu m and final concentration of cellulose microfibrils of 0.1-1 mass/vol.%; (c) mixing the materials obtained in steps (a) and (b) in water; (d) centrifuging the suspension obtained in the step (c) at 500-4000 RPM, for 5-60 minutes; (e) removing the precipitate from the material obtained in the step (d), in order to obtain a homogeneous suspension whose final concentration of carbon nanotubes varies at 0.1-1 mass/vol.% and the concentration of cellulose microfibrils varies at 0.1-1 mass/vol.%; and (f) adding plasticizing agent to the suspension obtained in the step (e) and homogenizing. USE - The process is useful for obtaining carbon nanomaterial ink, which is used for monitoring deformations, stresses and impact. ADVANTAGE - The process: is cost-effective; and provides films and sensors which exhibits piezoresistive characteristics and good mechanical properties. DETAILED DESCRIPTION - Obtaining carbon nanomaterial ink, comprises: (a) obtaining carbon nanotubes (CNT), through techniques e.g. chemical vapor deposition, electric arc discharge, laser ablation, plasma torch and liquid electrolysis, with diameters of 10-20 nm, and lengths greater than 3 mu m, homogeneously suspending in water/alcohol or water/glycol, at a concentration of 0.1-2 mass/vol.%, the proportion of water in the solvent being greater than or equal to 50%; (b) obtaining MFC with diameters of 20-700 nm and lengths greater than 10 mu m and final concentration of cellulose microfibrils of 0.1-1 mass/vol.%; (c) mixing the materials obtained in steps (a) and (b) in water, at concentrations of 0.1-10 mass/vol.%, and in the proportion of 30-70% NTC and 30-70% MFC, using a high shear spreader, operating at 500-25000 RPM, for 5-60 minutes; (d) centrifuging the suspension obtained in the step (c) at 500-4000 RPM, for 5-60 minutes; (e) removing the precipitate from the material obtained in the step (d), in order to obtain a homogeneous suspension whose final concentration of carbon nanotubes varies at 0.1-1 mass/vol.% and the concentration of cellulose microfibrils varies at 0.1-1 mass/vol.%; and (f) adding 0.01-0.5 mass/vol.% plasticizing agent to the suspension obtained in the step (e), the plasticizing agent being made up of acrylic-based polymers, e.g. carboxymethylcellulose, and homogenizing. INDEPENDENT CLAIMS are also included for: (1) carbon nanotube ink comprising 0.1-1 mass/vol.% cellulose microfibrils with diameters of 20-700 nm and lengths greater than 10 mu m, 0.1-1 mass/vol.% carbon nanotubes with diameters of 10-20 nm and lengths greater than 3 mu m, and 0.01-0.5 mass/vol.% plasticizing agent comprising carboxymethylcellulose, or polymers derived from cellulose, ethylene glycol or acrylic base; (2) carbon nanotube film obtained from the ink, where the ink is applied to a surface via spray, brush, roller or by immersion (dip coating) and is subsequently dried, and comprising 10-90 mass/vol.% carbon nanotubes, 10-90 mass/vol.% cellulose microfibrils, and 1-50 mass.% plasticizing agent; and (3) carbon nanotube sensors, comprising the film, where the film is deposited on a transfer platform with an engraved pattern and transferred to a final substrate, e.g. a polymeric film with an adhesive layer (primer), e.g. acrylic, polyurethane or polyester, through mechanical contact, e.g. stamping.