Using nanoparticles in enhancing the strength properties of old corrugated container | |
| Author | Landrea, Fanny |
| Call Number | AIT Thesis no.PP-06-12 |
| Subject(s) | Nanoparticles Papermaking--Chemistry |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | The utilization rate of recycled fiber in packaging papers and boards is higher than that of printed products, and the recycled fiber utilization is increasing in the world. Recycle fibers have low strength compare to virgin fibers whereas strength is very important for packaging board. The development of nanoparticle chemistry enhancing drainage and retention could be considered to improve strength properties of packaging board, especially acc. In this experiment, American acc was used as a raw material. Four factors were investigated: PAC content, starch content, silica nanopm1icles content and refining level. The range of factors level investigated were: 0-0.4% PAC content, 0.2-1 % starch, 0.05-0.65% silica nanoparticles and 1000-7000 revolutions refining. The parameters were: air permeability, formation, tensile index, bending index, compression index, ring crush index, Scott bond and tear index. Response surface method was used to investigate the imp0l1ance of these factors and to get optimum condition. All testing were analyzed using response surface, except air permeability because air permeability for sample no.2 was out of range. It was found that air permeability was increased by PAC and starch addition. Silica increased air permeability and after certain point, air permeability started to decrease. Refining decreased air permeability. Using response surface, it was found that acc strength properties were mostly affected by linear relation among factors, quadratic relation was found in formation parameters and interaction relation was found in ring crush index parameter. It was also found that refining affected all parameters significantly. Refining improved the formation. 4200 rev refining above, formation became worse. Refining increased tensile index, compression index, ring crush index and Scott bond. Refining decreased bending and tear index. Regarding to its function as anionic trash collector, PAC had significant effect in almost all parameters. PAC increased tensile index, compression index, tear index and Scott bond. PAC decreased bending and ring crush index. Starch did not influence all testing significantly, except ring crush index, in which there were interaction effect between starch-refining and starch-silica. Silica had great effect on compression index. Addition of silica increased compression index. Even though the effect was not significant in this region of experiment because its effect was lower than other factors' effects, addition of silica improved bending stiffness index and tear index |
| Year | 2006 |
| 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) | Nazhad, Mousa M. |
| Examination Committee(s) | Dutta, Joydeep;Lehtinen, Esa |
| Scholarship Donor(s) | Government of Finland - AIT Fellowship |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2006 |