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RISS 인기검색어
- 검색키워드
- 저자 : Alireza Ashori (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Effect of Chitosan Addition on the Surface Properties of Kenaf (Hibiscus cannabinus) Paper
Ashori Alireza,Raverty Warwick D.,Harun Jalaluddin The Korean Fiber Society 2005 Fibers and polymers Vol.6 No.2
The present paper studies the effect of chitosan, cationic starch and polyvinyl alcohol (PVA) as sizing agents to enhance surface properties of kenaf paper. The polymers were incorporated into the sheets by spray application. The results clearly showed that the addition of chitosan to a sheet formed from beaten fibers had excellent improvement in surface properties, compared to the effect of other additives. Sizing quality of cationic starch fairly matched with the sizing quality of chitosan, however, it was able to reduce the water absorption potential of paper more than chitosan at a same concentration. In most other properties, particularly the most important property for printing papers, surface smoothness, chitosan-sized papers are superior to the paper sized with cationic starch or PVA.
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Pulp and Paper from Kenaf Bast Fibers
Ashori Alireza The Korean Fiber Society 2006 Fibers and polymers Vol.7 No.1
Samples of kenaf (Hibiscus cannabinus) grown in Malaysia were examined to determine the kraft pulp and paper-making properties of their bast (or bark) fibers. Using kraft pulping process showed that bast fibers were relatively easy to cook resulting good pulp yields in the range of 45-51 %. The bast pulp produced sheets with great density, tear index and dry zero-span breaking length. Kenaf bast fiber is considered promising for production of high-grade printing, writing and specialty papers.
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Alireza Ashori,Saman Menbari,Reza Bahrami 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.38 No.-
This work reports an improvement in the mechanical and thermo-mechanical properties of short carbonfiber (SCF)/polypropylene (PP) composite, resulting from coating of the SCFs with exfoliated graphenenanoplatelets (xGnPs). Firstly, the xGnPs were coated on the SCFs surface by a simple physical absorptionmethod, and then the composites were manufactured by melt blending and hot-press processing. Theamount of SCFs was kept constant at 15 wt% and the amount of xGnP was varied up to 3 wt%. Results oftensile and impact measurements indicated that, for the xGnP–SCF/PP composite, maximum tensilestrength, tensile modulus and impact strength were 43.4 MPa, 1.052 GPa, and 38.1 J/m, respectively,corresponding to 13.6%, 41.7%, and 7.3% enhancement compared to the untreated SCF/PP composite. Inaddition, the results of dynamic mechanical thermal analyses indicated enhancement in storagemodulus and damping capacity for the treated samples; however, no significant difference was observedin the glass transition temperature. The xGnP–SCF/PP interface adhesion enhancement was clearlyshown by scanning electron microscopy (SEM) images of the tensile failure surfaces. Finally, the optimalxGnP content for effectively improving the overall composite mechanical and thermo-mechanicalperformance was found to be 1 wt%.
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