Impregnation of paper with cellulose nanofibrils and polyvinyl alcohol to enhance durability
| Autor: | Hyeonji Park, Hye Jung Youn, Tae-Young Kim, Simyub Yook, Shin Young Park |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Industrial chemistry Forestry 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Durability Polyvinyl alcohol 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering General Materials Science Cellulose 0210 nano-technology |
| Zdroj: | Nordic Pulp & Paper Research Journal. 35:106-114 |
| ISSN: | 2000-0669 0283-2631 |
| Popis: | Durable papers should exhibit high mechanical strength and good soiling resistance. In this study, cellulose nanofibrils (CNF) was investigated as an additive to the polyvinyl alcohol (PVA) impregnation solution to improve the durability of paper. The impregnation suspensions were prepared by adding CNF to PVA solution in various ratios, and were used to impregnate a base paper. The PVA-CNF suspensions exhibited good dispersion stability; however, the low shear viscosity increased as its CNF content increased. The pickup weights of the papers impregnated with the PVA-CNF suspensions were found to be lower than those of the control sample, which were impregnated with the pure PVA solution only. Although the strength of the paper was not significantly improved by the addition of CNF, when the paper was impregnated with a PVA-CNF suspension containing 5 % CNF content, the product exhibited similar strength to the papers impregnated with only a 3 % PVA solution despite its lower pickup weight. The mechanical strength of the impregnated paper was affected by the pickup weight and penetration of the impregnating agent. The addition of a wet strengthening agent to the mixed suspensions was seen to enhance the wet soiling resistance of the papers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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