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Carrageenan as a dry strength additive for papermaking
Zhenhua Liu1,2, Xinping Li2, Wei Xie1
1College of Bioresources Chemical and Materials Engineering, Shanxi University of Science and Technology, Xi'an, Shanxi Province P. R. China.
Plos One
|February 8, 2017
Summary
Carrageenan, a seaweed extract, significantly boosts paper strength and filler retention when used with additives like Al2(SO4)3 and cationic polyacrylamide (CPAM). This study highlights its potential as an effective dry strength agent in papermaking.
Area of Science:
- Marine biotechnology
- Polymer science
- Materials science
Background:
- Carrageenans are sulfated polysaccharides from red seaweeds, structurally analogous to pectins.
- They are commercially significant and possess unique properties for industrial applications.
Purpose of the Study:
- To investigate carrageenan's efficacy as a dry strength additive in papermaking.
- To evaluate its performance independently and in combination with Al2(SO4)3 and cationic polyacrylamide (CPAM).
Main Methods:
- Handsheet preparation with varying additive concentrations.
- Evaluation of tensile index, ash content, and filler (PCC) retention.
- Characterization using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM).
Main Results:
- A combination of 0.6% Al2(SO4)3 and 0.2% carrageenan increased tensile index by 13.53% and PCC retention by 57.06%.
- Adding 0.03% CPAM alongside Al2(SO4)3 and carrageenan further boosted PCC retention by 121% without compromising tensile index.
- Carrageenan demonstrated a capacity to enhance paper strength and retention.
Conclusions:
- Carrageenan functions as an effective anionic dry strength agent in papermaking.
- Synergistic effects observed with Al2(SO4)3 and CPAM suggest optimized formulations for improved paper properties.
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