Bio-based moisture absorption and sweat discharging multifunctional finishing agent and preparation method and application thereof
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Solution Overview
Problem
Conventional polyester fiber fabrics are hydrophobic, prone to static electricity, and have poor hand feel and laundering durability due to their inability to balance hydrophilicity and eutectic melting, which is exacerbated by excessive addition of polyethylene glycol hydrophilic chain segments.
Innovation Solution
A bio-based moisture absorption and sweat discharging multifunctional finishing agent is developed, comprising a specific molecular structure derived from bio-based polyethylene glycol, dibasic acids with a furan structure, and aliphatic dibasic acids, which undergoes transesterification and polycondensation reactions to create a finishing agent with improved hydrophilicity, anti-static properties, and laundering durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If polyethylene glycol hydrophilic chain segments are embedded into polyester main chain, then hydrophilicity is improved, but laundering durability deteriorates
Solution Approach 1:
The finishing agent is segmented into distinct functional blocks: hydrophobic polyester chain segments (providing durability through eutectic melting) and hydrophilic polyethylene glycol segments (providing moisture absorption). This segmentation allows each component to perform its function independently without interfering with the other, resolving the contradiction between hydrophilicity and laundering durability
Solution Approach 2:
The invention creates a composite finishing agent combining polyester and polyethylene glycol segments in a specific molecular structure. This composite material integrates the hydrophobic, durable polyester backbone with the hydrophilic polyethylene glycol side chains, achieving both improved hydrophilicity and maintained laundering durability through synergistic composition
2Object-affected harmful factors
If excessive polyethylene glycol chain segments are added, then hydrophilicity is enhanced, but eutectic melting is hindered
Solution Approach 1:
The invention precisely controls the parameter of polyethylene glycol content, specifying that it comprises 5-50 mass% of the total finishing agent. This parameter optimization ensures sufficient hydrophilicity while maintaining enough polyester segments to enable eutectic melting, thereby resolving the contradiction between enhanced hydrophilicity and preserved eutectic melting capability
3Object-affected harmful factors
If polyethylene glycol with irregular macromolecular side chains is embedded, then hydrophilicity is improved, but hand feel and laundering durability deteriorate
Solution Approach 1:
The invention applies local quality by specifying linear polyethylene glycol side chains rather than irregular macromolecular ones. This structural refinement at the molecular level provides sufficient hydrophilicity while maintaining fabric smoothness and hand feel, resolving the contradiction between hydrophilicity improvement and hand feel quality
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 finishing agent enhances moisture absorption, sweat discharging, and softness of hydrophobic fiber fabrics, achieving multiple functions while reducing dependence on petroleum-based materials and improving ecological sustainability.
Implementation Method 1
comprising a specific molecular structure derived from bio-based polyethylene glycol, dibasic acids with a furan structure, and aliphatic dibasic acids, which undergoes transesterification and polycondensation reactions
Implementation Method 2
comprising a specific molecular structure derived from bio-based polyethylene glycol, dibasic acids with a furan structure, and aliphatic dibasic acids, which undergoes transesterification and polycondensation reactions
Implementation Method 3
R2 is derived from bio-based polyethylene glycol, with a molecular structure of —(CH2CH2O)n—H, n=22 to 91... hydrophobic fiber fabrics treated with this finishing agent have excellent moisture absorption
Implementation Method 4
hydrophobic fiber fabrics treated with this finishing agent have excellent moisture absorption, sweat discharging, hydrophilicity, anti-static properties
Data Source
AI summary
A bio-based moisture absorption and sweat discharging multifunctional finishing agent and a preparation method and application thereof is provided, a structural formula of which is:wherein, R1 is linear or branched alkyl; R2 is derived from bio-based polyethylene glycol, with a molecular structure of —(CH2CH2O)n—H, n=22˜91, and n is a natural number; a=60˜150, and a is a natural number; b is a natural number; the molar ratio of structural units with a degree of polymerization of a to those with a degree of polymerization of b is (30˜85):(15˜40). Its use in the after finish of hydrophobic fiber fabrics can improve their water absorption and anti-static properties, giving them a laundering durable effect and a fluffy and soft feel.