Zhand, S., Masoudifar, M., Saraeian, A., Ghasemiyan, A. (2013). Effect of alkaline pre-treatment on physical, optical and mechanical properties of semi-chemical NSSC wheat straw pulp. , 28(Summer 2), 366-380. doi: 10.22092/ijwpr.2013.2952
Soodeh Zhand; Masieh Masoudifar; Ahmad Reza Saraeian; Ali Ghasemiyan. "Effect of alkaline pre-treatment on physical, optical and mechanical properties of semi-chemical NSSC wheat straw pulp". , 28, Summer 2, 2013, 366-380. doi: 10.22092/ijwpr.2013.2952
Zhand, S., Masoudifar, M., Saraeian, A., Ghasemiyan, A. (2013). 'Effect of alkaline pre-treatment on physical, optical and mechanical properties of semi-chemical NSSC wheat straw pulp', , 28(Summer 2), pp. 366-380. doi: 10.22092/ijwpr.2013.2952
Zhand, S., Masoudifar, M., Saraeian, A., Ghasemiyan, A. Effect of alkaline pre-treatment on physical, optical and mechanical properties of semi-chemical NSSC wheat straw pulp. , 2013; 28(Summer 2): 366-380. doi: 10.22092/ijwpr.2013.2952

Effect of alkaline pre-treatment on physical, optical and mechanical properties of semi-chemical NSSC wheat straw pulp

تحقیقات علوم چوب و کاغذ ایران
Article 14, Volume 28, Summer 2 - Serial Number 43, June 2013, Pages 366-380    PDF (265.05 K)
Document Type: Research Paper
DOI: 10.22092/ijwpr.2013.2952
Authors
Soodeh Zhand* 1; Masieh Masoudifar2; Ahmad Reza Saraeian3; Ali Ghasemiyan4
1Wood &Paper Industrial Engineering, Department of Pulp and Paper Science and Technology, Gorgan University of Science and Natural Resourses, Gorgan, Iran.
2Wood &Paper Industrial Engineering , University of zabol, Iran.
3Wood & Paper Industrial Engineering, Department of Pulp and Paper Science and Technology, Gorgan University of Science and Natural Resources, Gorgan, Iran
4Wood & Paper Industrial Engineering, Department of Pulp and Paper Science and Technology, Gorgan University of Science and Natural Resources, Gorgan, Iran.
Abstract
In this study the effect of alkaline pretreatment with 1% NaOH on physical, optical and mechanical properties and refining of NSSC (Neutral Sulfite Semi Chemical) wheat straw pulp were investigated. The wheat straw (Zagros Sp.) was obtained from croplands Golestan province. Splinted wheat straw was pretreated with 1% NaOH(on the basis of OD weight) at 70 degrees for 30 minutes. The main pulping was performed at 160 ˚C with the fixed ratio of 5:1 Na2S03 and NaOH. After pulping defibration was done by lab-refiner to 380±25ml (CSF) and total yield and changes in Kappa was determined. Hand sheets of 60 gr. /m² were made on the basis of TAPPI standard and physical, optical and mechanical properties determined.  The results show that alkaline pre-treatment has a significant effect in increasing of physical, optical and mechanical properties. Calculating primary freeness of pulps indicates that by increasing chemical compounds and NaOH, freeness decreases and that by increasing chemical compounds paper density increases, whereas yield, caliper and bulk decrease. 
Keywords
WHEAT STRAW; Neutral Sulfite Semi Chemical pulp; freeness
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