Carbon Nanotube Construction Material Dispersion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing construction materials face challenges in achieving high compression strength and reducing drying and consolidating times, while also being economically viable and maintaining the efficiency of carbon nanotubes due to their tendency to coagulate and require high concentrations that are not economically feasible.
Innovation Solution
A construction material composition comprising a binder, filler, and stabilized aqueous carbon nanotube dispersion with a specific proportion of carbon nanotubes (0.1 ppm to 150 ppm by mass) and fly ash (30 to 85% by mass), where the carbon nanotubes are treated using pulsed electrostatic fields and superplasticizers to prevent agglomeration and enhance dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high concentrations of carbon nanotubes are added to improve compressive strength, then the mechanical properties are enhanced, but the cost increases significantly and economic viability is lost
Solution Approach 1:
The patent changes the concentration parameter of carbon nanotubes from high levels (typically >1 wt%) to ultra-low levels (0.01-0.5 wt%), achieving comparable or superior compressive strength through optimized dispersion quality rather than quantity. This parameter transformation resolves the contradiction by showing that low concentration can achieve high performance when combined with proper dispersion techniques
Solution Approach 2:
The patent introduces dispersants and surface treatment agents as intermediary substances between carbon nanotubes and the cement matrix. These intermediaries prevent nanotube agglomeration and improve interfacial bonding, allowing effective reinforcement at much lower nanotube concentrations, thereby reducing cost while maintaining strength
2Strength
If carbon nanotubes are added to construction materials to enhance properties, then mechanical strength improves, but the nanotubes tend to coagulate and aggregate, reducing their effectiveness
Solution Approach 1:
The patent employs dispersants, surfactants, and surface-modified agents as intermediary substances that coat carbon nanotubes and prevent direct nanotube-nanotube contact. This intermediary layer maintains nanotube separation and dispersion stability throughout mixing and curing processes, preventing agglomeration while preserving reinforcement effectiveness
Solution Approach 2:
The patent modifies surface parameters of carbon nanotubes through chemical functionalization or physical treatment, changing their surface energy and compatibility with the cementitious matrix. This parameter modification improves wettability and interfacial adhesion, preventing aggregation and maintaining stable dispersion for effective strength enhancement
3Reliability
If traditional cement compositions are used to achieve structural integrity, then the material is reliable, but the drying and consolidating times are excessively long
Solution Approach 1:
The patent promotes continuous and accelerated hydration reactions through improved nanotube-matrix interfacial bonding and surface area exposure. The optimized dispersion and interfacial treatment enable continuous water-cement reaction progression without interruption, accelerating strength development and reducing curing time while maintaining final structural integrity
Solution Approach 2:
The patent changes the microstructural parameters of the cement matrix through nanotube reinforcement and surface treatment, creating a more porous and reactive initial structure that allows faster water penetration and hydration. This parameter modification accelerates the early-age strength gain and reduces consolidating time while preserving long-term reliability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in significantly improved flow properties and reduced drying and consolidating times, achieving increased compressive strength and maintaining the catalytic properties of carbon nanotubes, making the composition more economically viable and efficient.
Implementation Method 1
the carbon nanotubes are treated using pulsed electrostatic fields and superplasticizers to prevent agglomeration and enhance dispersion
Implementation Method 2
the carbon nanotubes are treated using pulsed electrostatic fields and superplasticizers to prevent agglomeration and enhance dispersion
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2
AI summary
The present invention relates to a composition, in particular a construction material composition, comprising at least one binder, at least one filler, carbon nanotubes, and optional further ingredients, wherein the proportion of the carbon nanotubes is, according to the broadest aspect less than 200 ppm and is preferably 0.1 ppm to 150 ppm by mass in terms of the dry mass of the construction material composition. The composition according to the present invention has a high compression strength and short drying and consolidating times. The present invention is further directed to a method for the preparation of a stabilized aqueous carbon nanotube dispersion, a carbon nanotube dispersion prepared by said method enabling an excellent dispersion of carbon nanotubes, and a method for preparing said composition by blending at least one binder, at least one filler and optionally water with said dispersion.