纤维素纳米复合材料具有独特的荆棘状结构，在水中由多个模块组装而成

IF 8.5 1区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

International Journal of Biological Macromolecules Pub Date : 2025-03-20 DOI:10.1016/j.ijbiomac.2025.142329

Yu Liu , Haisong Qi

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引用次数: 0

摘要

提出了一种在水中利用纤维素纳米模块组装具有独特结构和性能的纤维素纳米复合材料的绿色新策略。首先，对纤维素纳米纤维（CNFs）表面的乙酰乙酰基进行修饰，得到乙酰乙酰基CNFs （ACNFs）。然后，acnf与纤维素纳米晶体（cnc）的还原端在水中通过Biginelli三组分反应，组装成具有独特的石楠状结构的ACNF-CNC纳米复合材料。与CNF薄膜的抗拉强度（78.2 MPa）相比，ACNF-CNC薄膜的抗拉强度（149.3 MPa）显著提高，这是由于ACNF-CNC纳米复合材料之间的物理缠结点增加所致。同样，PVA/ACNF-CNC薄膜的抗拉强度（187.9 MPa）明显高于PVA/CNF薄膜（131.8 MPa）。开发具有独特结构和性能的纤维素纳米复合材料可以促进纤维素的功能化和高价值应用。

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Cellulose nanocomposites with unique briar-like structure assembled with multiple modules in water

A new and green strategy for assembling cellulose nanocomposites with unique structure and properties using cellulose nano-modules in water is proposed. First, the acetoacetyl groups are modified on the surface of cellulose nanofibers (CNFs) to obtain acetoacetyl-CNFs (ACNFs). Then, ACNFs react with the reducing end of cellulose nanocrystals (CNCs) in water via the Biginelli three-component reaction to assemble the ACNF-CNC nanocomposites with unique briar-like structure. Compared with the tensile strength of CNF film (78.2 MPa), the tensile strength of ACNF-CNC film (149.3 MPa) is significantly improved, which is attributed to the increase of physical entanglement points between ACNF-CNC nanocomposites. Similarly, the tensile strength of the PVA/ACNF-CNC film (187.9 MPa) is significantly higher than that of the PVA/CNF film (131.8 MPa). The development of cellulose nanocomposites with unique structure and properties can promote the functionalization and high-value application of cellulose.

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来源期刊

International Journal of Biological Macromolecules 生物-生化与分子生物学

CiteScore

13.70

自引率

9.80%

发文量

2728

审稿时长

64 days

期刊介绍： The International Journal of Biological Macromolecules is a well-established international journal dedicated to research on the chemical and biological aspects of natural macromolecules. Focusing on proteins, macromolecular carbohydrates, glycoproteins, proteoglycans, lignins, biological poly-acids, and nucleic acids, the journal presents the latest findings in molecular structure, properties, biological activities, interactions, modifications, and functional properties. Papers must offer new and novel insights, encompassing related model systems, structural conformational studies, theoretical developments, and analytical techniques. Each paper is required to primarily focus on at least one named biological macromolecule, reflected in the title, abstract, and text.