GO (graphene oxide) and nano mineral powder synergistically dispersed CNT (carbon nanotube) modified nano building material as well as preparation method and application thereof

A building material and nanotechnology, applied in the field of nanomaterials, can solve the problems of weak bonding surface between CNT deposition layer and cement base layer, weak bonding interface between CNT and cement, and a large number of bubbles in surfactants, so as to achieve good piezoresistive transmission. Sensitive characteristics, excellent mechanical toughness, good durability

Active Publication Date: 2017-12-15
QINGDAO TECHNOLOGICAL UNIVERSITY
View PDF11 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents ZL200810064075.0, ZL200810064522.2, and ZL200810064501.0 respectively attempt to use surfactants to disperse CNTs in cement-based materials through ultrasonic, high-speed shear, and electric field induction processes; however, surfactants often have a lot of air bubbles, which may Affect the hydration of cement, and at the same time make the bonding interface between CNT and cement weak; on the one hand, the high-speed shearing method may shear the CNT, on the other hand, the sample processing amount is relatively small; on the one hand, the electric field induction method consumes a large amount of organic solvent, on the other hand Corresponding CNT deposition layer and cement base layer bonding surface is weak
International patent ZL200980125145.1 uses cement clinker as the substrate for anchoring transition metal nanoparticles, allowing continuous and large-scale synthetic

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • GO (graphene oxide) and nano mineral powder synergistically dispersed CNT (carbon nanotube) modified nano building material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation steps of the GO and nano-mineral powder synergistically dispersed CNT modified nano-building materials are as follows:

[0051] (1) Preparation of GO synergistically dispersed CNT suspension

[0052] Step 1: Add 0.1g of GO dispersion with 30% oxygen content into 300mL water dissolved in 5g of polycarboxylate superplasticizer, then add 1g of CNT powder with a diameter of 10-20nm and a length of 5-15μm, and then carry out Ultrasonic treatment, the corresponding process is to stop for 1s every 10s of ultrasound; through testing the GO / CNT / water reducer mixture in GO, The UV absorbance at the characteristic peaks (230nm, 220nm) of CNT's UV spectrum, combined with the consumed ultrasonic energy and the peak absorbance, comprehensively weighed and obtained the optimal ultrasonic treatment energy of 60KJ. Using the optimized ultrasonic energy treatment process, the ink-like GO / CNT dispersion mother liquid was finally prepared for future use.

[0053] Step 2: ...

Embodiment 2

[0065] The preparation steps of the GO and nano-mineral powder synergistically dispersed CNT modified nano-building materials are as follows:

[0066] (1) Preparation of GO synergistically dispersed CNT suspension

[0067] Step 1: Add 0.1g of GO dispersion with 30% oxygen content into 300mL of water dissolved in 5g of naphthalene sulfonate superplasticizer FDN, then add 50g of CNT dispersion with a concentration of 2wt%, and then perform ultrasonication Treatment, the corresponding process is to stop for 1s every 10s of ultrasound; by testing the GO / CNT / water reducer mixture under the ultrasonic treatment energy of 0KJ to 100KJ (step 10KJ), the corresponding GO / CNT / water reducer mixture is in GO, CNT The UV absorbance at the characteristic peaks (230nm, 220nm) of the UV spectrum, combined with the consumed ultrasonic energy and the peak absorbance, comprehensively weighed and obtained the optimal ultrasonic treatment energy of 60KJ. Using the optimized ultrasonic energy treat...

Embodiment 3

[0078] The preparation steps of the GO and nano-mineral powder synergistically dispersed CNT modified nano-building materials are as follows:

[0079] (1) Preparation of GO synergistically dispersed CNT suspension

[0080] Step 1: Add 25mL of GO dispersion with a concentration of 4mg / mL and an oxygen content of 41-50% into 300mL of water dissolved in 5g of aliphatic superplasticizer, and then add 1g of GO dispersion with a diameter of 1-2nm and a length of 2- The single-walled CNT powder of 8 μm is then subjected to ultrasonic treatment, and the corresponding process is to stop for 1 second every 10 seconds of ultrasonic treatment; by testing the GO / CNT / water reducer mixture, the corresponding GO / CNT is treated under the ultrasonic treatment energy from 0KJ to 100KJ (10KJ is taken in steps). The UV absorbance of the water-reducing agent mixture under the characteristic peaks (230nm and 220nm) of the UV spectrum of GO and CNT, combined with the consumed ultrasonic energy and ab...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Fracture toughnessaaaaaaaaaa
Fracture toughnessaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of nanomaterials and particularly relates to a GO (graphene oxide) and nano mineral powder synergistically dispersed CNT (carbon nanotube) modified nano building material as well as a preparation method and an application thereof. The GO and nano mineral powder synergistically dispersed CNT modified nano building material comprises CNT powder or a CNT dispersion liquid, GO powder or a GO dispersion liquid, nano mineral powder, a superplasticizer, water, cement and a defoamer. The prepared nano building material can realize the effect of synergistic dispersion of CNTs by GO and the nano mineral powder and solves the problem that GO is prone to deoxidation and agglomeration in an alkaline system. A prepared piezoresistive sensor based on the nano building material has good piezoresistance sensing performance, is excellent in mechanical toughness and high in compatibility with a concrete matrix, and has good application prospect in the fields of frame-shear coupling beams of high-rise buildings, energy-consuming nodes, high-strength/high-toughness joint seams between traffic bridges and pavement structures as well as large engineering health monitoring sensors.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to GO and nanometer mineral powder synergistically dispersed CNT modified nanometer building material and its preparation method and application. Background technique [0002] Cement-based composite materials have become the most widely used building materials in infrastructure construction due to their advantages such as convenient material acquisition, good plasticity of slurry, high compressive resistance of hardened body, and good durability. However, it has disadvantages such as low tensile strength and poor fracture toughness, which easily make the corresponding structural system based on cement-based composite materials fail. Solving these problems has very important application and economic value, and will further expand its application range. In the last century, people mainly improved the tensile strength and fracture toughness of cement-based materials by com...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B28/06C04B28/34C04B28/08C04B28/02G01B7/16
CPCC04B28/021C04B28/06C04B28/08C04B28/34G01B7/18C04B14/06C04B2103/302C04B22/002C04B14/026C04B14/024C04B24/42C04B14/062C04B14/303C04B24/32C04B14/308
Inventor 罗健林张春巍李秋义金祖权侯东帅张鹏张纪刚王鹏刚
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap