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Paper Information

Journal:   IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH   fall 2016 , Volume 31 , Number 3 (56) #a00486; Page(s) 398 To 409.

Analysis of the physical properties of the papers made from mixture of LbL-treated and refined pulp by response surface method

Author(s):  RUDI H.*, NAZERIAN M.
* Department of Cellulose and Paper Technology, Faculty of New Technologies and Energy Engineering, Shahid Beheshti University, Zirab, Mazandaran, Iran
In this study, the effect of using different percentages of Layer-by-Layer (LbL) treated pulp mixed with refined OCC recycled pulp on paper physical properties was investigated. The LbL treatments were conducted to build 7 consecutive cationic and anionic starch layers. OCC pulp was refined for 10, 15 and 20 minutes. The LbL pulp was mixed with either refined OCC pulp at three levels of 10, 20 and 30 percent. Hand sheets with basis weight of 60 g/m2 were prepared using different mixtures and the physical properties including: thickness, density, roughness and formation were examined. The results of LbL treatment using AFM micrographs indicated that the surface of fibers was covered with starch polymer particles. Also, SEM micrographs confirmed that surface of the fibers covered with starch is rough. Analysis of interactive effect of independent variables revealed that addition of LbL-treated pulp to the refined recycled pulp had only significant effect on paper thickness and surface roughness, while variation of refining time had significant influence on all physical properties. Considering the results of ANOVA test, the interactive effect of the content of LbL-treated pulp and different refining times on the paper physical properties using response surface method, it can be expressed that adding 10 % of LbL-treated pulp to the OCC pulp and applying the refining time of about 18. 66 minutes can be considered as the optimum condition.
Keyword(s): Recycled Fibers,beating,polyelectrolyte multi-layers,cationic and anionic starch,bending resistance
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