Paper360 - July/August 2014 - (Page 30)

techlink | INSIDE W W W. TA P P I . O R G JOURNAL T H E PA PER A ND PAC K AGING IND USTR IES ' TEC H NIC A L R ESO U RCE APRIL 2014 | VOL. 13 NO. 4 DEINKING Liquid phase plasma treatment for improved detachment of pigmented inkjet printed paper 9 W W W. TA P P I . O R G PAPERMAKING Role of particle size and preflocculation of talc in improvement of paper properties JOURNAL INDUSTRIES ' TECHNICAL THE PAPER AND PACKAGING Daniel T. Lee and Jeffery S. Hsieh 17 RESOURCE MAY 2014 | VOL. 13 NO. 5 Market projections of cellulose nanomaterial-enabled products − Part 1: Applications Jo Anne Shatkin, Theodore H. Wegner, E.M. (Ted) Bilek, and John Cowie Vipul Singh Chauhan and Nishi Kant Bhardwaj PRODUCTION PULPING A theoretical anaylysis of recirculation in pulp refiners 9 NANOCELLULOSE MARKETS 29 19 Innovative nanocellulose process breaks the cost barrier Kim Nelson and Theodora Retsina R.J. Kerekes NANOFIBERS 37 Effects of ultrasonic wave pretreatment on the fibrillation of cellulose fiber FLUFF PULP Yongjian Xu, Ying Yan, Xiaopeng Yue, Zhenfeng Zhu, Dingjun Zhang, and Guangqiang Hou 25 Preparation and characterization of cellulose nanofibers from bleached pulp using a mechanical treatment method Arvind Kumar, S.P. Singh, and A.K. Singh CELLULOSE NANOCRYSTALS 35 Progress in Paper Recycling MACROCONTAMINANTS Online analysis of macrostickies in a sorted office waste recycling plant making tissue 47 Michelle Ricard, Gilles M. Dorris, Natalie Pagé, and Denise Filion Enzymatic preparation of nanocrystalline and microcrystalline cellulose Sarah R. Anderson, Dominic Esposito, William Gillette, J.Y. Zhu, Ulrich Baxa, and Scott E. McNeil NANOPARTICLES 45 Peculiarities of cellulose nanoparticles Michael Ioelovich CELLULOSE NANOCRYSTALS 53 Effect of storage conditions on cellulose nanocrystal stability Stephanie Beck and Jean Bouchard TJ SummarieS THE PAPERS SUMMARIZED HERE ARE from the April issue and the May 2014 special nanocellulose issue of TAPPI Journal, an online publication of relevant and timely peer-reviewed research delivered via email and free to all TAPPI members. To receive TAPPI Journal, join TAPPI at www.tappi.org. APRIL papeRMaKING Role of particle size and pre-flocculation of talc in improvement of paper properties Vipul Singh Chauhan and Nishi Kant Bhardwaj papermaking. Relatively higher filler retention, paper strength, and hydrophobicity of paper were obtained with pre-flocculated talc compared to native talc. The optical properties of paper were unchanged on the loading of similar talc after pre-flocculation. The preflocculated talc of finer particle size provided higher opacity at similar ash, as well as paper strength, than the native talc of coarser size. number and area of heavy stickies, light macrocontaminants and dirt. The analyzer detected a wide range of macrocontaminant levels, during which the three types of macrocontaminants varied independently of each other. "Stickies storm" levels were detected and visualized by the analyzer, with heavy stickies levels exceeding 17,000/kg in the final pulp. Different particle size distribution patterns were noted for the light macrocontaminants when compared to those obtained for heavy stickies and dirt. Mill surveys of the fine screens and flotation cell showed different removal efficiencies for heavy stickies and light macrocontaminants. Fine screening was slightly more efficient in the removal of heavy stickies than of light macrocontaminants. Fine screens were more efficient at removing heavy stickies with particle sizes larger than 400 μm in diameter. On the other hand, flotation could remove heavy stickies with particle sizes of 200-300 μm. Furthermore, flotation was able to remove most of the light macrocontaminants independent of their particle size. celluloSe NaNocRYStalS Enzymatic preparation of nanocrystalline and microcrystalline cellulose Sarah R. Anderson, Dominic Esposito, William Gillette, Junyong Zhu, Ulrich Baxa, and Scott E. McNeil MacRocoNtaMINaNtS Online analysis of macrostickies in a sorted office waste recycling plant making tissue Michelle Ricard, Gilles M. Dorris, Natalie Pagé, and Denise Filion CELLULOSE NANOCRYSTALS. Enzymatically produced (a) microfibrillated cellulose and (b) nanowhiskers. PAPERMAKING. Effect of amphoteric starch as dry strength additive and talc pre-flocculating chemical at 71 PERCENT filler addition level. Filler loading using conventional approaches has some disadvantages, such as reduction in paper strength. The finer the filler, the more the strength loss. Several methods and materials have been reported to overcome or alleviate the same, but with higher costs. The approach in this study provides an economically viable solution to the problem, using conventional papermaking materials. Talc filler of different particle sizes, pre-flocculated using different doses of cooked amphoteric starch, was used for 30 Paper360º JULY/AUGUST 2014 MACROCONTAMINANTS. Simplified diagram of the macrocontaminant analyzer contaminant cell. An online macrocontaminant analyzer, the FPAutoSpeck, was used for 8,000 measurements of deinked pulp to determine the Traditional cellulose nanocrystal (CNC) production methods use harsh chemicals, are energetically expensive, and result in a hydrophilic sulfate surface chemistry with limited utility. Enzymatic production of CNCs is a less expensive alternative production method that eliminates the need for harsh chemicals and requires much less energy for mechanical fibrillation and heating. In this study, researchers show that cellulase from Aspergillus niger is capable of producing CNC and microfibrillated cellulose (MFC) from well-solubilized Kraft pulp feedstock with minimal processing, and that www.tappi.org http://WWW.TAPPI.ORG http://WWW.TAPPI.ORG http://www.tappi.org http://www.tappi.org

Table of Contents for the Digital Edition of Paper360 - July/August 2014

Over the Wire
Pulp and Paper Innovations
Strategic Importance of Water
Making Workers Heroes
Industry Emissions Improve
TAPPI Journal Summaries
Measuring Color Online
Consolidation Watch
Knowledge Builder
Association News
ASPI News
Setpoint
What’s New on paper360.org
Advertisers Index

Paper360 - July/August 2014

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