caa a22 4500 475783417 CHVBK 20180406123651.0 cr unu---uuuuu 170329e20000201xx s 000 0 eng 10.1023/A:1008166815023 doi (NATIONALLICENCE)springer-10.1023/A:1008166815023 Feasibility of utilizing Rhizoclonium in pulping and papermaking [Elektronische Daten] [Kuo-Ping Chao, Yu-Chang Su, Chung-Sing Chen] Material of Rhizoclonium from brackish water in Taiwan was investigated for its possible use in pulping and papermaking. After beating, this filamentous alga produced a pulp with a length to width ratio of about 10, much less than that of a typical wood pulp. Handsheets made from this pulp had a moderate breaking length of 4.02 km. Cooking pre-beaten pulp with a low chemical charge (5-25%NaOH) at a low cooking temperature (100 °C), and for a short time (30-120 min) gave high algal pulp yields (70-80%). This cooking process was sulfur-free, but the water requirement was high. After cooking and further caustic soda and bleaching treatments, wide-angle X-ray diffraction and FTIR spectroscopy showed that the crystallinity of the algal pulp increased substantially, but type I cellulose conformation was retained. The best pulp mechanical strengths (breaking length 5.23 km,zero-span tensile strength 79.2 Nm g-1, bursting index of 2.2 kpa m2 g-1) were obtained after cooking for 1 h with 20% NaOH. Because of the morphological characteristics of the algal strands, the pulp generally lacked bursting, tearing and folding strengths, but proper blending with softwood pulp increased the tensile breaking length to8.40 km, the tearing index to 14.5 mNm2 g-1, the bursting index to 6.42 kpam2 g-1 and the folding endurance to 4299 double folds, i.e. levels comparable to a typical kraft pulp. The algal pulp thus showed clear potential as a supplement for traditional medium strength wood pulps. Kluwer Academic Publishers, 2000 Rhizoclonium sp nationallicence pulping nationallicence papermaking nationallicence chemical cooking nationallicence algal paper nationallicence physical properties nationallicence Chao Kuo-Ping Department of Aquaculture, National Taiwan Ocean University, 20224, Keelung, Taiwan aut Su Yu-Chang Division of Wood Cellulose, Forestry Research Institute, 10728, Taipei, Taiwan aut Chen Chung-Sing Department of Aquaculture, National Taiwan Ocean University, 20224, Keelung, Taiwan aut Journal of Applied Phycology Kluwer Academic Publishers 12/1(2000-02-01), 53-62 0921-8971 12:1<53 2000 12 10811 https://doi.org/10.1023/A:1008166815023 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008166815023 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chao Kuo-Ping Department of Aquaculture, National Taiwan Ocean University, 20224, Keelung, Taiwan aut NATIONALLICENCE 700 1- Su Yu-Chang Division of Wood Cellulose, Forestry Research Institute, 10728, Taipei, Taiwan aut NATIONALLICENCE 700 1- Chen Chung-Sing Department of Aquaculture, National Taiwan Ocean University, 20224, Keelung, Taiwan aut NATIONALLICENCE 773 0- Journal of Applied Phycology Kluwer Academic Publishers 12/1(2000-02-01), 53-62 0921-8971 12:1<53 2000 12 10811 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer