| ชื่อเรื่อง | : | Alkaline Sulfite Pulping and ECF-Bleaching of Sweet Bamboo (~iDendrocalamus asper~i Backer) |
| นักวิจัย | : | Suphat Kamthai |
| คำค้น | : | - |
| หน่วยงาน | : | ฐานข้อมูลวิทยานิพนธ์ไทย |
| ผู้ร่วมงาน | : | - |
| ปีพิมพ์ | : | 2546 |
| อ้างอิง | : | http://www.thaithesis.org/detail.php?id=1162546000097 |
| ที่มา | : | - |
| ความเชี่ยวชาญ | : | - |
| ความสัมพันธ์ | : | - |
| ขอบเขตของเนื้อหา | : | - |
| บทคัดย่อ/คำอธิบาย | : | In this study, the morphological, physical and chemical properties ofthe 3 year-old sweet bamboo were investigated. The sweet bamboo chips. werepulped using alkaline sulfite (AS), alkaline sulfite with anthraquinone (AS-AQ)processes. Conventional kraft pulping was performed as reference. The selectedpulps were subsequently ECF bleached with D(,0)ED(,1)EP sequence. Thepapermaking properties of unbleached and bleached pulps were evaluated. Theresults demonstrated that sweet bamboo is an appropriated raw material for pulpproduction due to its morphological, physical and chemical properties, and alsopulp and papermaking properties. The basic density and moisture content of sweetbamboo were 725 kg /M3 and 60.2496 respectively. The important chemicalcompositions were holocellulose 76.3196, lignin 28.7096 and ash 1.4696. Datawere collected in part of fiber morphology which indicated its fiber dimensionsas follows: fiber length 3.11 mm, fiber width 18.03 Am, cell lumen 4.35 11m,cell wall thickness 6.98 elm and Runkel ratio 3.2. Sweet bamboo fiber was long,fair narrow, thick wall and had blunt or end point. The pulping resultsindicated that pulp yield and kappa number of AS pulping were approximately 1096and 17 points higher than those of kraft pulping. The addition of anthraquinone(AQ) in AS pulping resulted in better delignification while the pulp yield wasunchanged. Thus kappa numbers of AS-AQ pulps were approximately 20 points lowerthan those of AS pups. The results of ECF-bleaching with D(,0)ED(,1)EP sequencepresented that the AS-AQ pulp required less bleaching chemicals than kraft pulpto reach target brightness at 88 96150. Consideration on papermaking propertiesindicated that beatability and strength of AS-AQ pulp were lower than those ofkraft pulp. After bleaching, tensile strength of both pulps decreased while tearand burst strength, and folding endurance of AS-AQ pulp increased. Theunbleached AS-AQ pulp had higher density and lower thickness than kraft pulp.The advantages of AS-AQ pulping over kraft pulping were higher pulp yield at thesame delignification rate, higher brightness of unbleached pulp and better bleachability. However, strength and beatability of kraft pulp was superior than AS-AQ pulp. |
| บรรณานุกรม | : |
Suphat Kamthai . (2546). Alkaline Sulfite Pulping and ECF-Bleaching of Sweet Bamboo (~iDendrocalamus asper~i Backer).
กรุงเทพมหานคร : ฐานข้อมูลวิทยานิพนธ์ไทย. Suphat Kamthai . 2546. "Alkaline Sulfite Pulping and ECF-Bleaching of Sweet Bamboo (~iDendrocalamus asper~i Backer)".
กรุงเทพมหานคร : ฐานข้อมูลวิทยานิพนธ์ไทย. Suphat Kamthai . "Alkaline Sulfite Pulping and ECF-Bleaching of Sweet Bamboo (~iDendrocalamus asper~i Backer)."
กรุงเทพมหานคร : ฐานข้อมูลวิทยานิพนธ์ไทย, 2546. Print. Suphat Kamthai . Alkaline Sulfite Pulping and ECF-Bleaching of Sweet Bamboo (~iDendrocalamus asper~i Backer). กรุงเทพมหานคร : ฐานข้อมูลวิทยานิพนธ์ไทย; 2546.
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