Design of Functional Polymer Systems to Optimize the Filler Retention in Obtaining Cellulosic Substrates with Improved Properties

In the present work, the possibility of increasing the calcium carbonate (CaCO ) content in sheets of paper to optimize their properties was investigated. A new class of polymeric additives for papermaking is proposed as well as a method for their use in paper sheet containing the CaCO precipitated...

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Bibliographic Details
Published in:Materials 2023-02, Vol.16 (5), p.1904
Main Authors: Ungureanu, Elena, Fortună, Maria E, Țopa, Denis C, Lobiuc, Andrei, Ungureanu, Ovidiu C, Jităreanu, Doina C
Format: Article
Language:English
Subjects:
Additives
Calcium carbonate
Calcium chloride
Cations
Cellulose
Cellulose fibers
Design optimization
Efficiency
Energy consumption
Lignin
Mechanical properties
Optical properties
Papermaking
Particle size
Permeability
Polyacrylamide
Polymers
Retention
Sodium carbonate
Substrates
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Summary:In the present work, the possibility of increasing the calcium carbonate (CaCO ) content in sheets of paper to optimize their properties was investigated. A new class of polymeric additives for papermaking is proposed as well as a method for their use in paper sheet containing the CaCO precipitated addition. Calcium carbonate precipitated (PCC) and fibers cellulose were adjusted with a cationic polyacrylamide flocculating agent (polydiallyldimethylammonium chloride (plyDADMAC) or cationic polyacrylamide (cPAM)). PCC was obtained in the laboratory by a double-exchange reaction between calcium chloride (CaCl ) and sodium carbonate (Na CO ) suspension. After testing, the dosage of PCC was established at 35%. To improve the systems of additives studied, the materials obtained were characterized and their optical and mechanical properties were analysed. The PCC had a positive influence over all of the paper samples, but in the case of use of cPAM and polyDADMAC polymers the paper obtained had superior properties compared to the paper obtained without additives. Also, the samples obtained in the presence of cationic polyacrylamide exhibit superior properties to those obtained in the presence of polyDADMAC.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16051904