Papermaking characteristics of three Populus clones grown in the north-central United States |
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| Affiliation: | 1. Faculty of Paper Science and Engineering, SUNY College of Environmental Science and Forestry (SUNY-ESF), 1 Forestry Drive, Syracuse, NY 13210, USA;2. Construction Management and Wood Products Engineering Faculty, SUNY-ESF, USA;3. USDA Forest Service, North Central Research Station, Rhinelander, WI, USA;1. Department of Applied Mathematics, Kunming University of Science and Technology, Kunming, Yunnan 650093, PR China;2. Department of Mathematics, College of Science, China Three Gorges University, Yichang, Hubei 443002, PR China;1. School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu 611731, PR China;2. Institute of Mathematics and Computing Science, University of Groningen, Nijenborgh 9, P.O. Box 407, 9700 AK Groningen, The Netherland;3. Department of Mathematics, East China Normal University, Shanghai 200241, PR China;1. Department of Statistical Sciences, University of Padova, via C. Battisti 241, 35121 Padova, Italy;2. Research Center for Statistics and Geneva School of Economics and Management, University of Geneva, 1211 Geneva, Switzerland |
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| Abstract: | The papermaking properties of 22 pure and hybrid poplars are being evaluated in an on-going investigation. Twenty of the poplars were harvested after 7.5 years from three different sites in the Midwestern and North Central US. The other 2 poplars survived at only two of three sites (64 total samples). The Crandon hybrid had the highest growth rate (t ha?1 y?1) and wood density (both averaged across the 3 sites). This poplar had a high cellulose content (compared to the average), a low lignin content and produced bleached kraft fibers at a high yield (wt.% on wood chips). Further, this poplar responded very well to kraft pulping and oxygen delignification and bleached to the highest final brightness ever observed in our laboratory (94.5% Elrepho). It also produced an 18 kappa number unbleached pulp with <0.5% rejects in only two-thirds the time required for sugar maple (Acer saccharum).We also report on clone 220-5 that had the highest area-weighted average microfibril angle. Pulps from this poplar had excellent tensile properties and further improvements are expected with 1–2 years of additional growth that should result in a small, but significant increase in average fiber length. Some results are also presented for clone 313.55 and aspen (Populus tremuloides) to demonstrate the many substantial benefits that can be accrued from proper wood selection. |
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