Dissolution of Various Cellulosic Materials and Effect of Regenerated Cellulose on Mechanical Properties of Paper
| Autor: | Velta Fridrihsone, Martins Spade, Juris Zoldners, Inese Filipova, Igors Sivacovs, Marianna Laka, Marite Skute, Uldis Grinfelds |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering Regenerated cellulose 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences stomatognathic diseases chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Cellulosic ethanol General Materials Science Cellulose 0210 nano-technology Dissolution |
| Zdroj: | Key Engineering Materials. 800:138-144 |
| ISSN: | 1662-9795 |
| Popis: | Recycling of paper materials or other type of cellulose fibres is important regarding saving nature resources and environmental protection. Cellulose dissolution and regenerating from various materials is one of recycling possibilities. Cellulose dissolution by NaOH/urea system has a great potential due to the use of harmless reagents, and at the same time is challenging due to the forming of gel-like substances, when cellulose has degree of polymerization more than 1000. It was found that microcrystalline cellulose and cotton cellulose were dissolved in NaOH/urea, but tissue paper, filter paper and waste paper were not dissolved completely. Additives of Kraft pulp and pulp waste dissolved and regenerated from NaOH/urea and cupriethylendiamine (CuETD) in amount 0-30% from paper composition increased mechanical properties of paper sheet. CuETD additive was more effective than NaOH/urea additive, however latter has potential for further research as environmentally friendlier. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|