盖竹球形纳米纤维素的制备及壳聚糖/纳米纤维素复合材料的力学性能,Polymer Composites

当前位置： X-MOL 学术 › Polym. Compos. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

盖竹球形纳米纤维素的制备及壳聚糖/纳米纤维素复合材料的力学性能
Polymer Composites ( IF 4.8 ) Pub Date : 2023-01-27 , DOI: 10.1002/pc.27243
Thi Vi Vi Do _{1,

2} , Ngoc Bao An Tran _{1,

2} , Ngoc Uyen Nguyen‐Thai _{1,

2}

Affiliation

在这项研究中，球形纤维素纳米晶体已从盖竹（Bambusa blumeana) 纤维用硫酸水解法。通过傅里叶红外光谱中键振动的变化和热重图起始温度的降低，探讨了原竹纤维中无定形组分、木质素和半纤维素的去除以及硫酸基团的掺入。透射电子显微镜和X射线衍射结果表明，纳米纤维素呈球形，直径为2～10 nm，结晶指数为70.30%，结晶度为0.77。评估了载有球形纳米纤维素的壳聚糖薄膜的热性能和机械性能的改善。有趣的是，载有球形纳米纤维素的壳聚糖薄膜的拉伸强度、模量和断裂伸长率均有所提高。含 2 份纳米纤维素的壳聚糖薄膜达到的最高值。拉伸强度、模量和断裂伸长率的增加值分别为63%、207 MPa和30%。此外，壳聚糖薄膜的吸湿率降低到 20%，表明阻隔性能得到改善。这些改进说明了纳米级球形纳米纤维素的进步以及纳米纤维素和壳聚糖之间的化学相容性导致纳米纤维素在壳聚糖基质中的良好分散，开发了高性能生物纳米复合材料。壳聚糖薄膜的吸湿率降低到20%，表明阻隔性能得到改善。这些改进说明了纳米级球形纳米纤维素的进步以及纳米纤维素和壳聚糖之间的化学相容性导致纳米纤维素在壳聚糖基质中的良好分散，开发了高性能生物纳米复合材料。壳聚糖薄膜的吸湿率降低到20%，表明阻隔性能得到改善。这些改进说明了纳米级球形纳米纤维素的进步以及纳米纤维素和壳聚糖之间的化学相容性导致纳米纤维素在壳聚糖基质中的良好分散，开发了高性能生物纳米复合材料。

"点击查看英文标题和摘要"

Preparation of spherical nanocellulose from Gai bamboo and mechanical properties of chitosan/nanocellulose composite

In this study, spherical cellulose nanocrystals have been extracted from Gai bamboo (Bambusa blumeana) fibers by sulfuric acid hydrolysis methods. The removal of amorphous components, lignin, and hemicellulose in raw bamboo fiber and the incorporation of sulfate groups were explored via the changes of bond's vibration in Fourier-infrared spectra and the decrease of onset temperature of thermogravimetric diagram. The results from transmission electron microscopy and X-ray diffraction revealed that the nanocellulose has a spherical shape with a diameter of 2 to 10 nm and the crystallization index of 70.30% and crystallization degree of 0.77. The improvement of thermal and mechanical properties of the chitosan films loaded with spherical nanocellulose were evaluated. Interestingly, the tensile strength, modulus, and elongation at break for chitosan film loaded with spherical nanocellulose were all increased. The highest value achieved with chitosan film containing nanocellulose of 2 phr. The increase values of tensile strength, modulus and elongation at break were of 63%, 207 MPa, and 30%, respectively. In addition, the moisture absorption of the chitosan film was decreased to 20% indicating that the barrier properties have improved. These improvements illustrated the advancement of nano sized of spherical nanocellulose and the chemical compatibility between nanocellulose and chitosan that resulted in well-dispersion of nanocellulose in chitosan matrix, developed high performance bionanocomposite.

更新日期：2023-01-27

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南