Use of modified tapioca starch in papermaking | |
| Author | Maung Tha Naing |
| Call Number | AIT Thesis no. BP-98-11 |
| Subject(s) | Tapioca Papermaking |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | This research was undertaken to determine the effect of different cassava starches on the physical properties of eucalyptus pulp and paper prepared from this pulp. The starches were native starch and native starches pretreated by heating, enzymatichydrolysis and cationization. The commercial modified starches (Amylofax Tl I 00, Amylofax T2200, and Amylofax T3300) were included in this study for comparison. Prior to the use of these starches in papermaking, the various physical and chemical properties including paste viscosity and nitrogen content were analyzed. In the study on the application of starch in papermaking, the effect of beating speed on the physical properties of eucalyptus pulp as well as the handsheets made from it was first studied. It was found that 5000 rpm was favorable. Using this speed, the effect of different starches on the freeness of the pulp and the strength of the paper was determined. The results suggested that the heat-treated cationic starches seemed to be the best. Based on the selected speed of beating, the effect of different concentrations and levels of cationization (so called degree of substitution, DS) of the heat-treated cationic tapioca on the freeness of the eucalyptus pulp and the strength of its paper was evaluated. It was found that 1-3% addition of heat-treated cationic starches prepared in this research at any levels of DS tested was favomable. However, the lower level of DS was preferrable costwise. Analysis of the zeta potential value of the pulp slurry with various starches added was also can'ied out. The results confirmed that the bigger the zeta potential value (lesser negative value), the higher was the paper strength. |
| Year | 1998 |
| 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 | Bioprocess Technology (BP) |
| Chairperson(s) | Pakorn Nuchnoi ; |
| Examination Committee(s) | Stevens, Willem F. ;Suwalee Chandrkrachang ;Rakshit, Sudip K. ;Montet, Didier ;Palokangas, Antti; |
| Scholarship Donor(s) | His Majesty the King of Thailand; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1998 |