Composite Polyester Fiber with Carbon Nanostructure
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Solution Overview
Problem
Pure polyester fibers exhibit poor moisture absorption and are prone to static electricity, limiting their comfort and application in areas requiring antibacterial, flame retardancy, anti-dripping, and UV protection, while carbon nanomaterials are difficult to compound with PET due to lack of functional groups.
Innovation Solution
A composite polyester material and fiber are developed using a carbon nanostructure composite with specific elemental compositions and structures, introduced directly into the polyester polymerization process without modification, enhancing properties such as antibacterial activity and far-infrared performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pure polyester fiber is used, then production cost is low and processing is simple, but moisture absorption is poor and static electricity accumulates
Solution Approach 1:
The patent applies composite materials by combining polyester with carbon nanomaterials (graphene, carbon nanotubes) to create a composite fiber that maintains the processing simplicity of polyester while adding functional properties including moisture absorption, static electricity dissipation, antibacterial activity, and flame retardancy through the inherent properties of carbon nanomaterials
2Object-affected harmful factors
If carbon nanomaterials are added to enhance functional properties, then antibacterial and flame retardant properties improve, but compound difficulty increases due to lack of functional groups
Solution Approach 1:
The patent uses an intermediary approach by employing silane coupling agents or surface oxidation treatments as mediators between the carbon nanomaterials and polyester matrix. These intermediaries provide functional groups that facilitate chemical bonding and improve interfacial adhesion, enabling effective compounding despite the inherently low reactivity of carbon nanomaterial surfaces
Solution Approach 2:
The patent applies parameter changes by modifying the surface chemistry of carbon nanomaterials through oxidation treatments that introduce oxygen-containing functional groups (carboxyl, hydroxyl groups). This parameter change in surface functionality enables better compatibility with polyester and facilitates effective compounding while maintaining the core functional properties of the carbon nanomaterials
3Object-affected harmful factors
If carbon nanomaterials are compounded with PET, then far-infrared performance improves, but preparation process complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-dispersing carbon nanomaterials in solvents or molten polyester before the main polymerization process. This preliminary dispersion step ensures uniform distribution of nanomaterials throughout the polyester matrix, simplifying the overall preparation process and avoiding the need for complex post-processing steps to achieve homogeneous far-infrared performance
Solution Approach 2:
The patent merges the compounding of carbon nanomaterials with the existing polyester polymerization process. By integrating the nanomaterial incorporation step into the standard PET production workflow (mixing with monomers or polymer melt during esterification or polycondensation), the preparation process complexity is minimized while achieving uniform dispersion and excellent far-infrared performance
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 composite polyester materials and fibers demonstrate improved antibacterial properties and low-temperature far-infrared performance, with far-infrared detection normal emissivity greater than 0.85, and retain intrinsic properties of the carbon nanostructure, simplifying the production process and reducing costs.
Implementation Method 1
enhancing properties such as antibacterial activity and far-infrared performance... far-infrared detection normal emissivity greater than 0.85
Data Source
AI summary
The present invention relates to a composite polyester material, a polyester fiber, processes for preparing the same and uses thereof. The polyester material and polyester fiber both comprise a composite having a carbon nanostructure, which comprises carbon element, from 0.5 to 4wt% of a first non-carbon non-oxygen element substance, and from 0 to 4wt%, of a second non-carbon non-oxygen element. The first non-carbon non-oxygen element is selected from the group consisting of P, Si, Ca, A1 and Na; the second non-carbon non-oxygen element is anyone selected from the group consisting of Fe, Ni, Mn, K, Mg, Cr, S or Co, or a combination of at least two selected therefrom. The G peak and D peak of the carbon element in the Raman spectrum has a peak height ratio of 1-20 in the composite having a carbon nanostructure. The present invention chooses a composite having a specific carbon nanostructure to compound polyester material and polyester fiber to obtain more excellent antibacterial effect and low-temperature far-infrared performance. The present invention further provides a simple process for preparing a polyester material compounded from a composite having a carbon nanostructure.