CN-121978157-A - Carbon nano tube sensor applied to online manufacturing monitoring and preparation method thereof

CN121978157ACN 121978157 ACN121978157 ACN 121978157ACN-121978157-A

Abstract

The invention relates to a carbon nano tube sensor applied to on-line manufacturing monitoring and a preparation method thereof, which solve the problems that the traditional patch sensor is poor in chemical compatibility, incapable of monitoring a forming process and the like. The carbon nano tube sensor comprises a matrix and a dispersion liquid attached to the matrix, wherein the matrix is a polyimide flexible adhesive tape material resistant to high temperature of 200 ℃, the dispersion liquid comprises 0.1% of carbon nano tubes by mass, 3% of triton by mass and an aqueous solution, and the carbon nano tubes are multi-wall carbon nano tubes with the inner diameter of 10nm, the outer diameter of 20nm and the length of 30 um. The preparation method of the carbon nano tube sensor comprises the step of forming a layer of 100-mu m two-dimensional micro-nano carbon sensing film on the surface of a polyimide flexible adhesive tape material by using a spraying system. The invention can effectively reduce the molding time and the rejection rate of the special phenolic composite material and provide powerful guarantee for the equipment safety and the product quality of the special phenolic composite material.

Inventors

LIANG DEJIAN
XIE YUANJIANG
LI XINGZHONG
LI CHANGXIN
WEI HANPENG
ZHAO XIN
FAN XIGANG
GUO YUJIE
XIONG LIANGTONG
LIU LIANXI
WANG XURAN
LI LIN

Assignees

北京星航机电装备有限公司

Dates

Publication Date: 20260505
Application Date: 20251229

Claims (8)

1. The carbon nano tube sensor applied to on-line manufacturing monitoring is characterized by comprising a matrix and a dispersion liquid attached to the matrix, wherein the matrix is a polyimide flexible adhesive tape material resistant to high temperature of 200 ℃, the dispersion liquid comprises 0.1% by mass of carbon nano tubes, 3% by mass of triton and an aqueous solution, and the carbon nano tubes are multi-wall carbon nano tubes with inner diameters of 10nm, outer diameters of 20nm and lengths of 30 um.
2. The carbon nanotube sensor for on-line manufacturing monitoring of claim 1, wherein the surface of the carbon nanotube sensor is sprayed with graphene sheets.
3. The carbon nanotube sensor for on-line manufacturing monitoring of claim 2, wherein the graphene sheet is 10-30 mg of graphene sheet with a lattice size of 30 nm.
4. The carbon nanotube sensor for on-line manufacturing monitoring of claim 1, wherein the dispersion liquid comprises 10-30 mg of graphene sheets with a lattice size of 30 nm.
5. The preparation method of the carbon nanotube sensor according to any one of claims 1 to 4, which is applied to on-line manufacturing monitoring, is characterized in that a layer of 100-mu m two-dimensional micro-nano carbon sensing film is formed on the surface of a polyimide flexible adhesive tape material by utilizing a spraying system.
6. The method for on-line manufacturing and monitoring of the special phenolic resin composite material is characterized in that special phenolic resin slurry suitable for a diversion process is selected, a curing chamber of the phenolic resin slurry is built according to a VARTM process according to different environment temperatures, a sealing tape (1) is used for sealing, meanwhile, the prepared carbon nanotube sensor (2) is attached to the inside of the VARTM curing chamber, an induction area of the sensor is fully fused with resin in the feeding process of the resin through a feed pipe (3) by a resin collector (4), the integrated fusion of a composite material mold system is realized, the vacuum pressure and the time for regulating and controlling the formation of a mixture ratio of a fast/slow curing agent are regulated by a vacuum pump (5) in the chamber, the curing speed and the curing pressure of the phenolic resin are controlled, the influence on the resin curing and monitoring is generated, and the vacuum pressure under 0.01atm and the resin/curing agent mixture ratio of 111:5 are selected, so that the interference of external environment on the resin curing monitoring is eliminated.
7. The method for on-line manufacturing and monitoring of the carbon nanotube sensor according to any one of claims 1 to 4 is characterized in that a large number of sensor lattices are sprayed on the basis of the carbon nanotube sensor (2), signals are externally transmitted by sensor leads (15), the carbon nanotube sensor (2) is distributed in a mold and used for capturing flowing signals of resin, environmental changes caused by internal curing reaction are captured by the carbon nanotube sensor in real time in the process of resin polymerization until the curing reaction is basically finished, the indication of the carbon nanotube sensor (2) is kept constant, the curing condition of specific resin is obtained by combining the data of the carbon nanotube sensor (2) with the elimination of temperature drift, the curing rate of the resin is calculated, the resin flow and the analysis and acquisition of curing rate information of the resin represented by temperature and pressure are realized, and the temperature and pressure conditions of the conversion of the arrayed carbon nanotube sensor (2), the phenolic resin differential thermal analysis, scanning microscopic structural analysis data and characteristic resin are combined, so that the special phenolic resin is used for constructing a special structure-curing-related performance.
8. The method for detecting and reading the temperature and pressure data of the carbon nano tube sensor (2) is characterized in that before resin injection, the carbon nano tube sensor (2) which is laid is led out through an external electrode (9), an external circuit is connected to a universal meter (7) of a data acquisition system (6), a piezoresistive signal detection and reading module is built through Labview software of a computer, real-time acquisition and data visualization of the temperature and pressure data of the carbon nano tube sensor (2) are achieved, and the carbon nano tube sensor generates an electric signal data map coupled with a temperature and pressure field through temperature and pressure process data change generated by resin flow.

Description

Carbon nano tube sensor applied to online manufacturing monitoring and preparation method thereof Technical Field The invention relates to the technical field of intelligent sensors and intelligent monitoring, in particular to a flexible carbon nano sensor for online monitoring and sensing in a composite material forming process and a preparation technology thereof. Background The special phenolic composite material has been applied in aviation, aerospace, ship, traffic and other fields on a large scale, however, the molding mechanism is complex, the influence factors are numerous, the current molding process is still remained on the level of process control before molding and quality detection after molding, and the data in the molding process is lacking. The complex flowing and dynamic solidifying phenomena of the resin caused by the forming process are extremely easy to cause insufficient infiltration, poor/rich glue, uneven temperature and pressure and other process defects, so that the problems of deformation, layering, mechanical property degradation and the like of the composite structural member are caused, and the service safety of the manufactured product is seriously influenced. The traditional sensor technologies such as piezoelectricity, optical fiber and ultrasound have the problems of weight increment, defect introduction, complex wiring, difficult loading and unloading and the like, and the efficient and accurate online forming monitoring of the special phenolic composite material is difficult to develop. The method has the advantages that the method can be integrated with the complex mold system surface of the composite material simply, rapidly and nondestructively, can accurately and real-time monitor the complex state of the resin curing process and the using process of the composite material, and provides theoretical basis and technical support for developing new-generation intelligent composite material equipment capable of monitoring the full life cycle state of the intelligent composite material equipment and guiding the process improvement of the thermal protection molding process such as temperature setting, infiltration degree adjustment, mold pressure test and the like by utilizing the unique advantages of high strength, low density, high electrical sensitivity, capability of being integrated with any surface/interface and the like of the carbon nano material at the front edge of the carbon nano tube and the like. Disclosure of Invention The invention provides the carbon nanotube sensor applied to the online manufacturing monitoring of the special phenolic resin composite material and the preparation method thereof, which solve the problems that the traditional patch sensor is poor in chemical compatibility, cannot monitor the forming process and the like. The invention is realized by the following technical scheme: The carbon nano tube sensor comprises a matrix and a dispersion liquid attached to the matrix, wherein the matrix is a polyimide flexible adhesive tape material resistant to high temperature of 200 ℃, the dispersion liquid comprises 0.1% by mass of carbon nano tubes, 3% by mass of triton and an aqueous solution, and the carbon nano tubes are multi-wall carbon nano tubes with the inner diameter of 10nm, the outer diameter of 20nm and the length of 30 um. And graphene sheets are sprayed on the surface of the carbon nanotube sensor. The graphene sheets are 10-30 mg graphene sheets with a lattice size of 30 nm. The dispersion liquid comprises 10-30 mg of graphene sheets with the lattice size of 30 nm. The preparation method of the carbon nano tube sensor comprises the step of forming a layer of 100-mu m two-dimensional micro-nano carbon sensing film on the surface of a polyimide flexible adhesive tape material by using a spraying system. The carbon nanotube sensor is applied to an online manufacturing and monitoring method of special phenolic resin composite materials, wherein special phenolic resin slurry suitable for a diversion process is selected, a curing chamber of the phenolic resin slurry is built according to a VARTM process according to different environment temperatures, sealing is carried out by using a sealing tape 1, meanwhile, the prepared carbon nanotube sensor 2 is attached to the inside of the VARTM curing chamber, an induction zone of the sensor is fully fused with resin in the feeding process of the resin through a feeding pipe 3 by a resin collector 4, the integrated fusion of a composite material mold system is realized, the vacuum pressure and the time for regulating and controlling the proportion of fast/slow curing agents in the chamber are regulated and formed by a vacuum pump 5, the curing speed and the curing pressure of the special phenolic resin are controlled, the influence on the resin curing monitoring is generated, and the vacuum pressure under 0.01atm and the resin/curing agent proportion of 111:5 are selected, so that the interference of