Influence of drying method and precipitated salts on pyrolysis for nanocelluloses
Influence of drying method and precipitated salts on pyrolysis for nanocelluloses
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DOI：
10.1007/s10570-014-0242-2
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发表时间：
2014-03
期刊：
影响因子：
5.7
通讯作者：
K. Uetani;Yuta Watanabe;K. Abe;H. Yano
中科院分区：
文献类型：
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作者：
K. Uetani;Yuta Watanabe;K. Abe;H. Yano
通过关注纳米纤维素（NC）材料中的盐含量，研究了堆积密度和干燥方法对热解行为的影响。通过各种干燥方法发现不同堆积密度的NC材料的热重曲线几乎相同。由此得出结论，NC材料的堆积密度和干燥方法对热解行为影响不大。通过定量引入硫酸盐的纤维素纳米晶体材料中剩余的盐含量，我们区分了键合到纤维素上的硫酸盐基团和从溶剂中沉淀的硫酸盐。研究发现，沉淀的硫酸盐与键合的硫酸盐基团一样会加速 NC 的热解，但速率不同。 NC材料中的这两类硫酸盐对纤维素脱水应该具有不同的催化能力。
The influence of bulk density and drying method on pyrolysis behavior was studied by focusing on the salt content within the nanocellulose (NC) materials. The thermogravimetric curves for NC materials were found to be almost identical between the different bulk densities via the various drying methods. It was therefore concluded that the bulk density and drying method of NC materials had little influence on pyrolysis behavior. By quantitating the remaining salt content within the sulfate-introduced cellulose nanocrystal materials, we discriminated between the sulfate groups bonded onto cellulose and precipitated sulfate from the solvent. The precipitated sulfate was found to accelerate the pyrolysis of NCs in common with the bonded sulfate groups, but in a different rate. These two types of sulfate within the NC materials should have the different catalytic ability on the dehydration of cellulose.