Tappi Journal最新文献_第4页

The solubility of calcium carbonate in green liquor handling systems 碳酸钙在绿液处理系统中的溶解度

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-11-01 DOI: 10.32964/tj18.10.595

Alisha Giglio, V. Papangelakis, H. Tran

引用次数: 0

Evaluation of novel drum chipper technology: pilot-scale production of short wood chips 新型滚筒削片技术评价:短木片的中试生产

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-11-01 DOI: 10.32964/tj18.10.585

Jessica Gard Timmerfors, L. Jönsson

引用次数: 3

Exergy and sensibility analysis of each individual effect in a kraft multiple effect evaporator 卡夫多效蒸发器中各单独效应的火用和灵敏度分析

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-11-01 DOI: 10.32964/tj18.10.607

Jessica Moreira, B. L. D. O. Campos, E. F. D. C. Junior, Andréa O. S. Costa

引用次数: 0

Rheological characteristics of platy kaolin 板状高岭土的流变特性

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-10-01 DOI: 10.32964/tj18.9.535

A. Lyons

{"title":"Rheological characteristics of platy kaolin","authors":"A. Lyons","doi":"10.32964/tj18.9.535","DOIUrl":"https://doi.org/10.32964/tj18.9.535","url":null,"abstract":"Platy kaolin can provide significant value in the coating of paper and paperboard. It can be used in multiple applications and can provide benefits such as titanium dioxide (TiO2) extension, smoothness improvement, improved print gloss or ink set rates, calendering intensity reduction, and improved barrier properties. It is not a pigment\u0000that can be simply substituted for traditional hydrous kaolin without some adjustment to the coating formulation. These adjustments can be as simple as reducing solids, but may require binder changes as well. The coater setup may need to be adjusted because of the unique rheological behaviors these pigments exhibit. The unique rheological characteristics of platy kaolin are explored here. Measurements of the water retention of platy kaolin containing coatings confirm that water retention is not reduced in comparison to more blocky kaolin pigments, despite the lower coating solids at which they need to be run. This means that the rheological characteristics are the most important in understanding the runnability. An extensive analysis reveals some unique behaviors that need to be understood when utilizing these materials. Viscoelastic measurements indicate that, for this binder system, Tan δ is mainly a function of solids. This may explain how weeping is initiated on a blade coater. The degree of\u0000shear thinning behaviors is investigated using the Ostwald de-Waele power law. The immobilization point was determined using the Dougherty-Krieger equation and related to the work of Weeks at the University of Maine on blade coater runnability. An indirect measure of particle shape and size synergy is also demonstrated using the Dougherty-\u0000Krieger equation parameters.","PeriodicalId":22255,"journal":{"name":"Tappi Journal","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45445977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new technique for the measurement of show-through mottle of fine paper 一种新的精细纸张斑点显示测量技术

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-10-01 DOI: 10.32964/tj18.9.570

J. Bernié, J. Talbot, H. Pande

引用次数: 0

Flow characteristics of drag-reducing natural bamboo fiber suspensions with minimal environmental load 最小环境载荷下天然竹纤维减阻悬浮液的流动特性

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-10-01 DOI: 10.32964/tj18.9.559

S. Ogata, T. Kubo

{"title":"Flow characteristics of drag-reducing natural bamboo fiber suspensions with minimal environmental load","authors":"S. Ogata, T. Kubo","doi":"10.32964/tj18.9.559","DOIUrl":"https://doi.org/10.32964/tj18.9.559","url":null,"abstract":"The reduction of pipe friction loss by adding drag-reducing agents has attracted attention as an aid to energy conservation. Drag-reducing agents induce drag reduction (DR) effects and should have a minimal environmental load, with natural resource-saving potential. This study demonstrates bamboo fiber as a drag-reducing agent that saves natural resources and has a low environmental load. Using pressure drop measurements, we report DR with suspensions of bamboo fibers with the\u0000average diameter of 13.3 μm and aspect ratio of 98.7. The maximum DR obtained in this experiment is 43% at the concentration of 4000 ppm and pipe diameter of 30 mm; DR is affected by the Reynolds number, suspension concentration, and pipe diameter. In addition, the bamboo fibers can be easily removed from the suspensions by filtration.\u0000We found that low-environmental-load bamboo fiber has DR effects like those of other fibers; its effects are greater than those of conventional synthetic fibers and wood pulp. Furthermore, it is resistant to mechanical degradation, recoverable, and recyclable. Therefore, DR effects can be selectively obtained by adding the fibers only when\u0000DR is needed; the fibers can then be collected when DR is no longer necessary. This method might greatly expand the application range of DR agents. The results demonstrate the usefulness of bamboo fibers as DR additives.","PeriodicalId":22255,"journal":{"name":"Tappi Journal","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48173301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Critical parameters for tall oil separation I: The importance of the ratio of fatty acids to rosin acids 塔尔油分离的关键参数I：脂肪酸与松香酸比例的重要性

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-10-01 DOI: 10.32964/tj18.9.547

I. Dogaris, M. Lindström, G. Henriksson

{"title":"Critical parameters for tall oil separation I: The importance of the ratio of fatty acids to rosin acids","authors":"I. Dogaris, M. Lindström, G. Henriksson","doi":"10.32964/tj18.9.547","DOIUrl":"https://doi.org/10.32964/tj18.9.547","url":null,"abstract":"Tall oil is a valuable byproduct in chemical pulping of wood, and its fractions have a large spectrum of applications as chemical precursors, detergents, and fuel. High recovery of tall oil is important for the economic and environmental profile of chemical pulp mills. The purpose of this study was to investigate critical parameters of\u0000tall oil separation from black liquor. To investigate this in a controlled way, we developed a model test system using a “synthetic” black liquor (active cooking chemicals OH- and HS- ions), a complete process for soap skimming, and determination of recovered tall oil based on solvent extraction and colorimetric analysis, with good reproducibility. We used the developed system to study the effect of the ratio of fatty acids to rosin acids on tall oil separation. When high amounts of rosin acids were present, tall oil recovery was low, while high content of fatty acids above 60% significantly promoted tall oil separation. Therefore, manipulating the content of fatty acids in black liquor before the soap skimming step can significantly affect the tall oil solubility, and hence its separation. The findings open up chemical ways to improve the tall oil yield.","PeriodicalId":22255,"journal":{"name":"Tappi Journal","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49629486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

August 2019 2019年8月

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-08-01 DOI: 10.1044/leader.ppl.24082019.26

引用次数: 20

July 2019 2019年7月

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-07-01 DOI: 10.1144/geosci-29-6

Arip Widodo, Defita Raharjo, F. N. Astuti, H. Susilo, Kristin Sangur, M. Masykuri, M. Ramli, Nina Wirdianti

{"title":"July 2019","authors":"Arip Widodo, Defita Raharjo, F. N. Astuti, H. Susilo, Kristin Sangur, M. Masykuri, M. Ramli, Nina Wirdianti","doi":"10.1144/geosci-29-6","DOIUrl":"https://doi.org/10.1144/geosci-29-6","url":null,"abstract":", which comprised of approximately 200 words, provides a brief description of research problems, aims, method used, results, and conclusion. An abstract should stand alone, means that no citation in the abstract. Consider it the advertisement of your article. The abstract should tell the prospective reader what you did and highlight the key findings. Avoid using technical jargon and uncommon abbreviations. You must be accurate, brief, clear and specific. Use words which reflect the precise meaning. The abstract should be precise and honest. It emphasizes research results in which written in must be written to describe the research scope observed as well as the main terms undergirding the research. These keywords can be single and/or combined words. are established in Type your abstract here (9pt). Abstract, which comprised of approximately 200 words, provides a brief description of research problems, aims, method used, and results. It emphasizes research results in which written in single line spacing with left and right margin are 0.5 cm narrower than main text. 3 to 5 keywords must be written to describe the research scope observed as well as the main terms undergirding the research. These keywords can be single and/or combined words.","PeriodicalId":22255,"journal":{"name":"Tappi Journal","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43206275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of preincubation on the gelatinization of cassava and corn starch suspensions containing sodium hydroxide as a main component of corrugating adhesives 预培养对以氢氧化钠为主要组分的木薯和玉米淀粉悬浮液糊化的影响

IF 0.6 4区农林科学

Tappi Journal Pub Date : 2019-06-01 DOI: 10.32964/TJ18.5.321

T. Koyakumaru, Hirofumi Nakano

{"title":"Effects of preincubation on the gelatinization of cassava and corn starch suspensions containing sodium hydroxide as a main component of corrugating adhesives","authors":"T. Koyakumaru, Hirofumi Nakano","doi":"10.32964/TJ18.5.321","DOIUrl":"https://doi.org/10.32964/TJ18.5.321","url":null,"abstract":"Effects of the preincubation temperature and the caustic-ratio, the molar ratio of sodium hydroxide to starch glucose residue, on the gelatinization of cassava starch and corn starch suspensions were studied using differential scanning calorimetry in view of utilization for corrugating adhesives. The gelatinization temperature and enthalpy change of cassava starch suspensions after the preincubation at 30°C decreased as the caustic-ratio increased, similar to those of corn starch ones: The gelatinization starting temperature (Ts) decreased considerably more than the peak temperature and the conclusion temperature (Tc). Although Ts lowered and the width of gelatinization\u0000temperature expanded, compared with those of corn starch suspensions, the two starch suspensions with the same half gelatinization transition temperature showed similar gelatinization characteristics of almost the same Ts and Tc. During 1 h-preincubations at 30°C–50°C, the starch granules with Ts that were lowered considerably below\u0000each preincubation temperature by sodium hydroxide showed limited gelatinization. The gelatinization transition did not rapidly spread over the whole suspension, but progressed stepwise in response to the increase of the causticratio and the rise of the preincubation temperature. In a prolonged preincubation at a constant temperature, Ts gradually rose at higher caustic-ratios in which stepwise gelatinization commenced. Although the starch gelatinization was irreversible and not in a stable equilibrium state for a long time, we concluded that such stepwise gelatinization progress controlled the practical preparation and use of corrugating adhesives.","PeriodicalId":22255,"journal":{"name":"Tappi Journal","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48255771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0