| dc.creator |
Sutcu, ABDULLAH |
|
| dc.creator |
ŞAHİN, Halil Turgut |
|
| dc.date |
2016-12-31T21:00:00Z |
|
| dc.date.accessioned |
2020-10-06T11:01:14Z |
|
| dc.date.available |
2020-10-06T11:01:14Z |
|
| dc.identifier |
b4308d40-2071-4073-9b0b-678c3fb74ca9 |
|
| dc.identifier |
10.12841/wood.1644-3985.214.07 |
|
| dc.identifier |
https://avesis.sdu.edu.tr/publication/details/b4308d40-2071-4073-9b0b-678c3fb74ca9/oai |
|
| dc.identifier.uri |
http://acikerisim.sdu.edu.tr/xmlui/handle/123456789/69842 |
|
| dc.description |
It was observed that sodium hydroxide, formamide, and ethyl acetate treatments enhance fibre swelling (re-swelling) abilities, especially after the first recycling stage. The highest water retention values (WRV) of 2.76 g/g were found at the second recycling stage of 7.5% formamide treatment (7.5Fa(2)). However, the highest air permeability value of 8.83 m(2)/sec. was found at the third recycling stage of 5.0% in ethyl acetate treated samples (5Et(3)). The optical properties of the whiteness and brightness of the sheets presented a variation in the recycled sheets and with further recycling, usually resulted in marginal changes. The sodium hydroxide treatment usually resulted in a 1.2%-24.6% improvement of tensile strength. However; the highest burst strength improvement of 49.6% was achieved at a 7.5% NaOH charge at the first recycling stage (7.5Na(1)). The formamide treatments resulted in approx. 5.3% to 53.2% tensile strength improvement. The highest burst of 4.48 kPa m(2)/g was found at the first recycling stage of 7.5% (7.5Fa(1)) conditions with formmaide, which indicates 88.2% higher than control (C-1). Moreover; the highest tensile (38.8%) and burst strength (87.8%) improvements were found in the ethyl acetate treatment at the first recycling stage of 7.5% chemical charge level, while the highest tear strength improvement (102.6%) was found at the second recycling stage of 7.5% treatment level. It was realised that increasing the ethyl acetate concentration is usually positively correlated with all three strength properties of the sheets. |
|
| dc.language |
eng |
|
| dc.rights |
info:eu-repo/semantics/closedAccess |
|
| dc.title |
CHEMICAL TREATMENT OF RECYCLED PULP FIBRES FOR PROPERTY DEVELOPMENT: PART 1. EFFECTS ON BLEACHED KRAFT PULPS |
|
| dc.type |
info:eu-repo/semantics/article |
|