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氧化时间对使用过硫酸铵从轻木和木棉纤维制备的纤维素纳米晶体性能的影响

Effect of Oxidation Time on the Properties of Cellulose Nanocrystals Prepared from Balsa and Kapok Fibers Using Ammonium Persulfate.

作者信息

Marwanto Marwanto, Maulana Muhammad Iqbal, Febrianto Fauzi, Wistara Nyoman Jaya, Nikmatin Siti, Masruchin Nanang, Zaini Lukmanul Hakim, Lee Seung-Hwan, Kim Nam-Hun

机构信息

Department of Forest Products, Faculty of Forestry and Environment, IPB University (Bogor Agricultural University), Bogor 16680, Indonesia.

Department of Physics, Faculty of Mathematics and Natural Sciences, IPB University (Bogor Agricultural University), Bogor 16680, Indonesia.

出版信息

Polymers (Basel). 2021 Jun 7;13(11):1894. doi: 10.3390/polym13111894.

DOI:10.3390/polym13111894
PMID:34200423
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8201228/
Abstract

This study aimed to evaluate the effect of ammonium persulfate's (APS) oxidation time on the characteristics of the cellulose nanocrystals (CNCs) of balsa and kapok fibers after delignification pretreatment with sodium chlorite/acetic acid. This two-step method is important for increasing the zeta potential value and achieving higher thermal stability. The fibers were partially delignified using acidified sodium chlorite for four cycles, followed by APS oxidation at 60 °C for 8, 12, and 16 h. The isolated CNCs with a rod-like structure showed an average diameter in the range of 5.5-12.6 nm and an aspect ratio of 14.7-28.2. Increasing the reaction time resulted in a gradual reduction in the CNC dimensions. The higher surface charge of the balsa and kapok CNCs was observed at a longer oxidation time. The CNCs prepared from kapok had the highest colloid stability after oxidation for 16 h (-62.27 mV). The CNCs with higher crystallinity had longer oxidation times. Thermogravimetric analysis revealed that the CNCs with a higher thermal stability had longer oxidation times. All of the parameters were influenced by the oxidation time. This study indicates that APS oxidation for 8-16 h can produce CNCs from delignified balsa and kapok with satisfactory zeta potential values and thermal stabilities.

摘要

本研究旨在评估过硫酸铵（APS）氧化时间对经亚氯酸钠/乙酸脱木素预处理后的轻木和木棉纤维纤维素纳米晶体（CNCs）特性的影响。这种两步法对于提高zeta电位值和实现更高的热稳定性很重要。纤维先用酸化亚氯酸钠进行四个循环的部分脱木素处理，然后在60°C下用APS氧化8、12和16小时。分离出的具有棒状结构的CNCs平均直径在5.5-12.6nm范围内，长径比为14.7-28.2。反应时间的增加导致CNC尺寸逐渐减小。在较长的氧化时间下观察到轻木和木棉CNCs具有更高的表面电荷。由木棉制备的CNCs在氧化16小时后具有最高的胶体稳定性（-62.27mV）。结晶度较高的CNCs氧化时间更长。热重分析表明，热稳定性较高的CNCs氧化时间更长。所有参数均受氧化时间影响。本研究表明，8-16小时的APS氧化可以从脱木素的轻木和木棉中制备出具有令人满意的zeta电位值和热稳定性的CNCs。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/8587c852acf6/polymers-13-01894-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/62aa0fd746ee/polymers-13-01894-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/23802e0d49fe/polymers-13-01894-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/15b7f7e09aac/polymers-13-01894-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/a0653b372474/polymers-13-01894-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/e5c7d3a23773/polymers-13-01894-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/8587c852acf6/polymers-13-01894-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/62aa0fd746ee/polymers-13-01894-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/23802e0d49fe/polymers-13-01894-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/15b7f7e09aac/polymers-13-01894-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/a0653b372474/polymers-13-01894-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/e5c7d3a23773/polymers-13-01894-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d04b/8201228/8587c852acf6/polymers-13-01894-g006.jpg

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