Cashew Phenol Modified Lignosulfonate Strategy for the Preparation of High-performance Dye Dispersants

Jingjing Shi ¹, Yanju Lu ², Jianchun Jiang ³

⁰Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Key Lab. of Biomass Energy and Material, Jiangsu Province, National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, China.

International Journal of Biological Macromolecules +

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November 22, 2024

View abstract on PubMed

Summary

This study enhances lignin-based dye dispersants (LDD) by incorporating cashew phenol, improving dispersing power to 99.09% and exceeding market standards. This modification offers significant commercial value for lignin resource applications.

Area Of Science

Materials Science
Polymer Chemistry
Textile Chemistry

Background

Lignin-based dye dispersants (LDD) face limitations in modern fiber dyeing due to structural defects.
Efficient modification of LDD is crucial for value-added lignin applications and market expansion.

Purpose Of The Study

To upgrade and modify industrial kraft lignin into high-performance dye dispersants.
To enhance the dispersibility and performance of lignin-based dye dispersants through cashew phenol incorporation.

Main Methods

Industrial kraft lignin was modified by introducing cashew phenol via CC bond condensation.
Structural properties were analyzed using FTIR, 1H NMR, GPC, and ICP.
Dispersibility was evaluated through dispersing power and low/high-temperature dispersion tests.

Main Results

The modified LDD exhibited a dispersing power of 99.09%.
Low/high-temperature dispersion values were 5s/4 and 6s/4, surpassing existing market LDD.
The study elucidated the CC bond condensation mechanism and the action mechanism on dye particles.

Conclusions

Cashew phenol incorporation significantly enhances lignin-based dye dispersants.
The modified dispersants demonstrate excellent performance and commercial potential.
Optimized sulfonation-condensation balances structural properties for improved functionality.

Keywords:

Cashew phenol Lignin dye dispersant Lignosulfonate