超声振幅和处理时间影响纤维素纳米晶的形貌和分散

IF 4.2 3区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
Jamileh Shojaeiarani, D. Bajwa, G. Holt
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引用次数: 55

摘要

摘要由于对石油基类似物替代品的需求日益增加,生物基材料的应用日益推动。在这方面,具有独特性质的纤维素纳米晶体(cnc)受到了极大的关注,但其亲水性对其商业应用提出了挑战。超声处理是改善cnc在不同溶剂和聚合物基质中的分散最常用的方法之一。本文研究了超声处理对cnc在水溶性聚合物(聚乙烯醇,PVA)中的分散效果。采用不同的超声时间和超声振幅制备了聚乙烯醇和cnc的水悬浮液。利用x射线衍射、透射电子显微镜和动态光散射研究了纳米碳管的形貌、粒径和分散性。结果表明:随着超声振幅的增大,纳米颗粒的长度明显减小,而超声时间长对纳米颗粒长度的影响较小;此外,在使用较长超声时间制备的样品中,观察到分散性的改善。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sonication amplitude and processing time influence the cellulose nanocrystals morphology and dispersion
Abstract The application of bio-based materials is becoming impellent owing to the increasing demand for alternatives to petroleum-based analogs. In this regard, cellulose nanocrystals (CNCs) with unique properties have received a significant interest, while their hydrophilic character poses a challenge to their commercial applications. Ultrasonication treatment is one of the most commonly used methods to improve CNCs’ dispersion in different solvents and polymer matrices. In this work, the effectiveness of ultrasonication treatment in the dispersion of CNCs in a water-soluble polymer (polyvinyl alcohol, PVA) was studied. An aqueous suspension of polyvinyl alcohol and CNCs was prepared using different ultrasonication times and amplitudes. The morphology, particle size and dispersion of CNCs were studied using X-ray diffraction, transmission electron microscopy, and dynamic light scattering. The results indicated that with increase in the sonication amplitude, there was a substantial decrease in nanoparticle length, while long sonication times gently affected the nanoparticle length. Furthermore, improved dispersion was observed in samples prepared using longer sonication time. Graphical Abstract
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来源期刊
Nanocomposites
Nanocomposites Multiple-
CiteScore
7.40
自引率
15.20%
发文量
18
审稿时长
16 weeks
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