期刊
CELLULOSE
卷 23, 期 5, 页码 2971-2987出版社
SPRINGER
DOI: 10.1007/s10570-016-0996-9
关键词
Nanofibrillation; Cellulose; Grinding; Reinforcement
资金
- Research Foundation of the Sao Paulo State - FAPESP, Brazil [2011/01128-5, 2013/50790-8, 2013/23810-8, 2009/17293-5, 2010/16524-0]
- National Council for Scientific and Technological Development - CNPq, Brazil [142082/2011-2, 306386/2013-5]
- Department of Foreign Affairs and International Trade (DFAIT), Canada
- Coordination for the Improvement of Higher Education Personnel (CAPES), Brazil
- Research Nucleus on Material for Biosystems (NAP-BIOSMAT), Brazil [USP 12.1.17620.1.9]
- Canadian Bureau for International Education - CBIE, Canada
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [09/17293-5, 13/50790-8, 10/16524-0] Funding Source: FAPESP
Nanofibrillated cellulose (NFC) is a type of nanomaterial based on renewable resources and produced by mechanical disintegration without chemicals. NFC is a potential reinforcing material with a high surface area and high aspect ratio, both of which increase reinforcement on the nanoscale. The raw materials used were unbleached and bleached bamboo organosolv pulp. Organosolv pulping is a cleaner process than other industrial methods (i.e. Kraft process), as it uses organic solvents during cooking and provides easy solvent recovery at the end of the process. The NFC was produced by treating unbleached and bleached bamboo organosolv pulps for 5, 10, 15 and 20 nanofibrillation cycles using the grinding method. Chemical, physical and mechanical tests were performed to determine the optimal condition for nanofibrillation. The delamination of the S2 layer of the fibers during nanofibrillation contributed to the partial removal of amorphous components (mainly lignin), which have low polarity and improved the adhesion of the fibers, particularly the unbleached cellulose. The transverse modulus of elasticity of the unbleached NFC was highest after 10 nanofibrillation cycles. Further treatment cycles decreased the modulus due to the mechanical degradation of the fibers. The unbleached NFC produced by 10 cycles have a greater transverse modulus of elasticity, the crystallite size showed increase with the nanofibrillation, and after 5 nanofibrillation cycles, no differences are observed in the morphology of the fibers.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据