| Author | Bhuiyan, Md. Mosharraf Hossain |
| Call Number | AIT Thesis no.PP-06-5 |
| Subject(s) | Paper coatings
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science |
| Publisher | Asian Institute of Technology |
| Abstract | The objective of this study was to find out the effects of electrolytes (NaCl and CaCl₂) on the properties of coating color and coated paper with ground calcium carbonate and kaolin clay used as pigment. The results show that, increasing amount of NaCl from 0.05 pph to 0.25 pph increases viscosity of kaolin from 1334 to 1850 mPas. Effect of NaCl on GCC is not influential. CaCl₂ does not show any vigorant behavior like NaCI for both the pigments. Zeta potential is decreased by 3 to 4 units with the same level of addition for the coating colour of kaolin and GCC both. Water retention decreases with increasing electrolyte dosage. Optical properties like light scattering coefficient, brightness and opacity increased by electrolytes especially for kaolin. It is note worthy to tell regarding increased of gloss about 4 units by the addition of electrolytes again specially for kaolin. It is also observed the development of IGT surface pick resistance for both the pigments. When dosage of NaCI was increased from 0 pph to 0.25 pph this value increased from 5.5 cm/s to 7.9 cm/s respectively for kaolin and higher dosage does not show any more changes. For, CaCl₂ the potentiality of development is more pronounced than NaCl. When dosage of CaCl₂ was increased from 0.03 pph to 0.09 pph this value increased for kaolin from 6.0 cm/s to 11.8 cm/s respectively. In case of coating with blend of pigment the addition of electrolytes is not influential at all in this respect. Throughout the study electrolytes don't show any influential effect on paper coated with GCC and pigment blend as well |
| 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) | Lehtinen, Esa |
| Examination Committee(s) | Malinen, Raimo O.;Nazhad, Mousa M. |
| Scholarship Donor(s) | Government of Finland -AIT Fellowship |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2006 |