September 2009最新文献

Modeling of bagginess due to storage of paper reels with ridges 带脊纸卷储存时的松垮性建模

September 2009 Pub Date : 2009-10-01 DOI: 10.32964/tj8.9.18

C. Land, Lennart Stolpe, L. Beghello

引用次数: 1

Retention of PCC and GCC fillers on chemical pulp fines surfaces PCC和GCC填料在化学纸浆细表面的保留

September 2009 Pub Date : 2009-10-01 DOI: 10.32964/tj8.9.38

H. Liimatainen, A. Haapala, J. Niinimaki

{"title":"Retention of PCC and GCC fillers on chemical pulp fines surfaces","authors":"H. Liimatainen, A. Haapala, J. Niinimaki","doi":"10.32964/tj8.9.38","DOIUrl":"https://doi.org/10.32964/tj8.9.38","url":null,"abstract":"We studied the retention of precipitated and ground calcium carbonate fillers (PCC and GCC, respectively) on chemical pulp fines surfaces by measuring the amounts of adsorbed fillers on the surfaces of the primary and secondary fines and long fiber fractions of eucalyptus pulp in the presence of a polymeric flocculant \u0000(CPAM). The mechanism of filler particle retention and adsorption on fines surfaces was clarified in more detail by measuring the kinetics of PCC adsorption in the absence of flocculant. The results showed that the primary and secondary fines fractions adsorb more PCC and GCC fillers on their surfaces (per gram of pulp) than the long fiber frac-tion in both the absence and presence of flocculants. In the absence of flocculants the adsorption of PCC both on fines and on the fiber fractions follows Langmuir kinetics, implying that the adsorption is in dynamic equilibrium with filler detachment and the maximum possible amount of filler that can be adsorbed corresponds to the monolayer coverage of particles. At low flocculant doses, i.e., doses that are relevant to papermaking, the fines fractions adsorb significantly more filler than the fiber fractions. In this case, their high surface charge density promotes CPAM adsorption onto fines, which in turn increases the adsorption of fillers to the fines surfaces through polymer bridges.","PeriodicalId":423156,"journal":{"name":"September 2009","volume":"71 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121003704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Decreasing specific energy of thermomechanical pulps from reduction of raw materials variability 通过减少原料的可变性来降低热机械纸浆的比能

September 2009 Pub Date : 2009-10-01 DOI: 10.32964/tj8.9.23

E. Dundar, L. Laperrière, F. Ding

引用次数: 6

3-D computational simulation of paper handsheet structure and prediction of apparent density 纸质手抄结构三维计算模拟及表观密度预测

September 2009 Pub Date : 2009-10-01 DOI: 10.32964/tj8.9.10

M. Rueff, R. Vincent, C. Voillot

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引用次数: 5

Pre-extraction of hemicelluloses and subsequent kraft pulping Part II: Acid- and autohydrolysis 半纤维素的预萃取和随后的硫酸盐制浆。第2部分:酸水解和自水解

September 2009 Pub Date : 2009-09-01 DOI: 10.32964/tj8.9.30

W. W. Al-Dajani, U. Tschirner, T. Jensen

引用次数: 53

Breakup mechanisms of brittle deposits in kraft recovery boilers – a fundamental study 硫酸盐回收锅炉脆性沉积物破碎机理的基础研究

September 2009 Pub Date : 2009-09-01 DOI: 10.32964/tj8.9.4

Ameya Pophali, M. Eslamian, A. Kaliazine, M. Bussmann, H. Tran

引用次数: 7