| 何新靓,方志强,李冠辉,彭李圆.蒙脱土含量对纤维素纳米纤丝基复合膜结构有序性的影响[J].中国造纸,2026,45(7):12-20 |
二维码（扫一下试试看！） |
| 蒙脱土含量对纤维素纳米纤丝基复合膜结构有序性的影响 |
| Effect of Montmorillonite Content on the Ordered Structure of Cellulose Nanofibrils-based Composite Film |
| 收稿日期：2026-01-06 修订日期：2026-04-03 |
| DOI：10.11980/j.issn.0254-508X.2026.07.002 |
| 关键词: 纤维素纳米纤丝 蒙脱土 有序结构 构效关系 |
| Key Words:cellulose nanofibrils montmorillonite ordered structure structure-property relationship |
| 基金项目:国家自然科学基金（U23A6005）；广东省基础与应用基础研究基金（2025A1515010005，2023B1515040013，2023A1515011026）。 |
| 作者 | 单位 | 邮编 | | 何新靓* | 华南理工大学轻工科学与工程学院,先进造纸与纸基材料全国重点实验室, 广东广州,510640 | 510640 | | 方志强* | 华南理工大学轻工科学与工程学院,先进造纸与纸基材料全国重点实验室, 广东广州,510640 | 510640 | | 李冠辉 | 华南理工大学轻工科学与工程学院,先进造纸与纸基材料全国重点实验室, 广东广州,510640 | 510640 | | 彭李圆 | 华南理工大学轻工科学与工程学院,先进造纸与纸基材料全国重点实验室, 广东广州,510640 | 510640 |
|
| 摘要点击次数: 327 |
| 全文下载次数: 32 |
| 摘要:本研究采用溶液浇铸法制备了TEMPO氧化纤维素纳米纤丝（TOCNF）/蒙脱土（MMT）复合膜，系统探究了MMT含量对TOCNF/MMT复合膜有序结构及构效关系的影响。结果表明，当MMT含量为10%~40%时，MMT可在复合膜中实现规整堆叠，形成致密的层状有序结构。该结构可有效促进界面应力传递，使复合膜的拉伸强度显著提升（最高可达142.5 MPa，为TOCNF膜的129%），同时保持高透光率（约92%）和低雾度（约5%）。然而，当MMT含量增至50%~80%时，复合膜内部出现直径1~3 μm的团聚体，导致层状结构规整性下降并引发局部无序化。无序结构导致应力集中，复合膜的力学性能显著劣化（拉伸强度最低降至44.9 MPa）；同时，无序结构会增加复合膜的孔隙率及孔径大小，进而增加TOCNF、MMT与空气间的界面数量，增强了光散射，使复合膜透光率下降（90.4%~78.6%），并引起雾度大幅度升高（37.7%~52.9%）。 |
| Abstract:In this study, TEMPO-oxidized cellulose nanofibrils (TOCNF)/montmorillonite (MMT) composite films were prepared by solution casting, and the effects of content of MMT on the ordered structure and structure-property relationships of the TOCNF/MMT composite films were systematically investigated. The results showed that when the content of MMT was 10%~40%, MMT nanosheets could be regularly stacked within the composite films, forming a dense and ordered lamellar structure. This structure effectively promoted interfacial stress transfer, leading to a significant enhancement in the tensile strength of the composite films, with a maximum value of 142.5 MPa, corresponding to 129% of that of the TOCNF film. Meanwhile, the composite films maintained high optical transmittance of approximately 92% and low haze of approximately 5%. However, the content of MMT increased to 50%~80%, agglomerates with diameters of approximately 1~3 μm appeared within the composite films, resulting in reduced regularity of the layered structure and local structural disorder. Such disordered structures induced stress concentration, thereby markedly deteriorating the mechanical properties of the composite films, with the tensile strength decreasing to as low as 44.9 MPa. In addition, the disordered structure increased the porosity and pore size of the composite films, thereby increasing the number of interfacial area between TOCNF, MMT and air, and enhancing the light scattering, caused a decrease in optical transmittance from 90.4% to 78.6% and a substantial increase in haze from 37.7% to 52.9%. |
| 查看全文
HTML
查看/发表评论 下载PDF阅读器 |
|
|
|