纳米纤维素表面烷基化特性的研究
Surface alkylation characters of cellulose nanofibrils.
-
摘要: 用表面烷基化的方法降低纳米纤维素表面的亲水性,并通过傅里叶红外光谱、X 射线衍射、X 射线光电子能 谱、扫描电子显微镜及能谱分析对烷基化后的纳米纤维素进行了测定。结果表明:KH鄄570 和纳米纤维素之间发生 了偶联反应,随着偶联剂浓度的升高,纳米纤维素的结晶度先下降后上升;硅醇或部分缩合的硅醇包覆在纳米纤维 素的表面,从而使烷基化纤维素的碳氧比下降;烷基化能使纳米纤维素表面的羟基量减少,降低了纳米纤维素表面 的亲水性;硅烷偶联剂与纳米纤维素发生了偶联反应,且反应程度一致,纳米纤维素表面烷基化均一。Abstract: Surface alkylation was used to improve the hydrophilcity of cellulose nanofibrils. Fourier transform infrared spectrum fourier, X-ray diffraction analysis, X-ray photoelectron spectroscopy, scanning electron microscope analysis and energy diffraction spectrum were applied to test the alkylated cellulose nanofibrils. The results showed that coupling reaction occurred between KH-570 and cellulose nanofibrils; the crystallinity of cellulose nanofibrils fell first and then increased a little with the coupling agent concentration increased. The surface of cellulose nanofibrils was covered by silicon alcohol or partial condensation silicon alcohol. And the carbon-oxygen ratio of alkylated cellulose nanofibrils decreased. There were less hydroxyl groups in alkylated cellulose nanofibrils than in cellulose nanofibrils. SEM shows that MEMO reacts with cellulose nanofibrls homogeneously.
-
Keywords:
- cellulose nanofibrils /
- surface alkylation /
- coupling reaction /
- EDX
-
-
期刊类型引用(7)
1. 李桂娟，夏伟，罗海希，程桂茹. 纳米纤维素晶须-壳聚糖/聚乙烯醇复合膜性能与细胞相容性. 化工进展. 2020(01): 356-364 . 
百度学术
2. 王璇，贾园，宋立美. 纳米纤维素表面聚丙烯酸丁酯原位修饰. 北京林业大学学报. 2019(10): 137-146 . 本站查看
3. 蒋仙友，张雅娟，汪济奎，吴根华. 纳米纤维素晶须与聚烯烃弹性体协同增韧增强聚丙烯三元复合材料性能研究. 林业工程学报. 2018(01): 89-96 . 百度学术
4. 杨伟胜，焦亮，愈智怀，戴红旗. 纳米纤维素膜疏水化改性研究进展. 纤维素科学与技术. 2017(03): 60-68 . 百度学术
5. 林凤采，卢麒麟，林咏梅，庄森炀，李现艳，黄彪. 一步法制备乙酰化纳米纤维素及其性能表征. 化工进展. 2016(02): 559-564 . 百度学术
6. 张仁华，张蕤，黎航，凌敏，刘志鹏. 纳米纤维素晶须增强生物聚酯P(3, 4)HB复合材料. 林业工程学报. 2016(03): 85-90 . 百度学术
7. 何文，李吉平，金辉，田佳西. 毛竹纳米纤维素的烷基化改性. 南京林业大学学报(自然科学版). 2016(02): 144-148 . 百度学术
其他类型引用(16)
计量
- 文章访问数: 1334
- HTML全文浏览量: 162
- PDF下载量: 188
- 被引次数: 23
下载:
