Nanocellulose Textile Dyeing With Low-Water Dye Fixation
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Solution Overview
Problem
Conventional textile dyeing technologies are environmentally unfriendly due to high water and energy consumption, generating large volumes of wastewater and posing ecological and health-related problems, with existing methods facing challenges in scalability, cost-effectiveness, and ecological impact.
Innovation Solution
The use of nanocellulose fibers as a carrier and binding agent in a non-aqueous dyeing process, which reduces water usage and enhances dye fixation on textile surfaces, employing nanocellulose gel with high specific surface area to bind chromophores and other molecules, such as antimicrobial and flame retardant agents, using methods like pad-dyeing and rotary screen printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wet process dyeing is used, then dyeing effectiveness is achieved, but water consumption increases significantly
Solution Approach 1:
Nanocellulose acts as an intermediary carrier that binds dye molecules and transfers them to textile fibers. The nanocellulose-dye complex serves as a mediator between the dye stock solution and the fabric, enabling dye deposition without requiring large volumes of water as a solvent
Solution Approach 2:
The invention changes the physical state and concentration parameters of the dyeing system by using highly concentrated nanocellulose suspensions or gels instead of dilute aqueous dye solutions. This parameter change allows the same dyeing function to be achieved with minimal water
2Reliability
If conventional wet process dyeing is used, then dyeing is achieved, but energy consumption increases
Solution Approach 1:
Nanocellulose serves as a binding agent that strongly adheres to fiber surfaces through hydrogen bonding and other interactions, reducing the need for high-temperature fixation processes. The intermediary nanocellulose-dye complex delivers dye directly to fibers at lower temperatures
Solution Approach 2:
The invention replaces the thermal-mechanical energy input of conventional dyeing (heating large volumes of water, agitation) with a chemical-physical mechanism where nanocellulose binding affinity drives dye transfer, reducing reliance on thermal energy
3Reliability
If conventional wet process dyeing is used, then dyeing process is completed, but wastewater volume increases
Solution Approach 1:
The invention extracts and removes water from the essential dyeing function, isolating the core dye transfer mechanism from the aqueous medium. Only the minimal water needed to maintain nanocellulose suspension stability is retained, while excess water is eliminated from the process
Solution Approach 2:
By changing the concentration parameter of the dyeing medium from dilute to highly concentrated nanocellulose systems, the volume of wastewater generated is dramatically reduced while maintaining effective dye transfer to fibers
4Quantity of substance
If nanocellulose is used as carrier, then water consumption is reduced, but process complexity increases
Solution Approach 1:
Nanocellulose performs multiple functions simultaneously: it acts as a carrier for dye molecules, a binding agent for fiber attachment, a suspension stabilizer, and a potential functionalizer for antimicrobial or flame retardant properties. This multi-functionality consolidates several process steps into one
Solution Approach 2:
The invention uses composite nanocellulose-dye materials that combine the properties of cellulose (biocompatibility, binding ability) with dye molecules (coloration). This composite approach enables a single material to achieve multiple objectives that would otherwise require separate processing steps
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
Significantly reduces water and energy consumption, increases dye fixation, and minimizes environmental impact by using nanocellulose to adhere dyes and finishes to fibers, offering a more sustainable and cost-effective dyeing process with improved product performance.
Implementation Method 1
nanocellulose gel with high specific surface area to bind chromophores and other molecules
Implementation Method 2
nanocellulose to adhere dyes and finishes to fibers
Data Source
AI summary
Disclosed are various embodiments for dyeing a material using a dyed nanocellulose dispersion, thereby reducing or eliminating the need for water in dyeing materials, such as fabrics and textiles. A dyed nanocellulose dispersion or gel may be prepared from wood pulp fibers using a homogenizer and a dye, wherein the dyed nanocellulose dispersion comprises nanosized cellulose fibrils. The dyed nanocellulose gel may comprise an approximate concentration of 0.5% to 6%. The dyed nanocellulose dispersion may be applied to a material, such as a fabric or textile material. The fabric or textile material can be dried resulting in a dyed material.