| Author | Nguyen Hong Minh |
| Call Number | AIT Thesis no.PP-00-6 |
| Subject(s) | Wood-pulp--Vietnam
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| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science |
| Publisher | Asian Institute of Technology |
| Abstract | Eucalyptus and acacia are typical trees in planted in many Asian countries. There are some specific eucalyptus and acacia species, which have very good papermaking potential. This study used 6 year-old eucalyptus and 5 year-old acacia from the northern Vietnam plantations to evaluate and compare their properties as raw material for paper. Comparisons were carried out with E. urophylla, E. camaldulensis, A. hybrid and mixed acacia (A. auriculiformis, A. mangium and A. hybrid). Kraft pulping and ECF bleaching were applied to produce the bleached pulps for writing and printing paper. Acacia was easier to delignify than eucalyptus in oxygen delignification. These pulps could be bleached to 88.5-89.5% ISO brightness. It was more difficult for E. camaldulensis to be bleached to a as high brightness as E. urophyla and acacias. Comparison on papermaking potential of eucalyptus and acacia species were mainly based on the fibre morphological and chemical characteristics of the raw materials. Eucalyptus fibres were longer and had higher coarseness than acacia fibres. Acacia had higher number of fibres per unit of weight than eucalyptus. E. urophylla had longest and coarsest fibres, followed by E. camaldulensis, mixed acacia and A. hybrid in this order. A. hybrid had highest fines content, next were mixed acacia, E. urophylla and E. camaldulensis. Acacia needed less beating energy to exceed the same beating degree as eucalyptus. The high number of short thin fibres and high fines content of acacia, especially A. hybrid produced paper with very good surface smoothness. The long and coarse E. urophylla fibres gave paper with high bulk and thus high printability. All pulps had excellent light-scattering coefficient for paper. |
| Year | 2000 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Pulp and Paper Technology (PP) |
| Chairperson(s) | Ruhanen, Mauno; |
| Examination Committee(s) | Kolehmainen, Heikki ;Malinen, Raimo O.; |
| Scholarship Donor(s) | Asian Institute of Technology |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2000 |