Silane modification of nanofibrillated cellulose and its effect on the properties of waterborne acrylic resin,Journal of Applied Polymer Science

当前位置： X-MOL 学术 › J. Appl. Polym. Sci. › 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.)

Silane modification of nanofibrillated cellulose and its effect on the properties of waterborne acrylic resin
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2023-08-10 , DOI: 10.1002/app.54543
Xinqi Li _{1,

2} , Jinghuan Chen _{1,

2} , Jingang Liu _{1,

2} , Kaiji Yang ₃

Affiliation

Nanofibrillated celluloses (NFC) have attracted tremendous attention as nanofillers to improve the mechanical properties of waterborne resin. In this study, NFC was prepared by mechanical fibrillation, and then modified respectively with three different types of silane coupling agents: γ-aminopropyltriethoxysilane (KH550), γ-(2, 3-epoxypropoxy) propyl trimethoxysilane (KH560), and γ-(methacryloyloxy) propyl trimethoxysilane (KH570). The obtained NFC and modified NFCs were physically mixed with water-based acrylic resin (WAR) to prepare films by casting method. The NFC, silanized NFC, and films were analyzed by Malvern laser particle sizer, scanning electron microscopy (SEM), Fourier transform infrared (FTIR), thermogravimetric analyzer (TGA), water contact angle (WCA), rotational rheometer, and power stretchers, respectively. Results showed that NFCs were successfully prepared and modified. The KH570 modified NFC had a slightly smaller particle size, higher absolute Zeta potential and yield stress values, good thermal stability, and exhibited better dispersion and suspension stability in solution. However, the NFC modified by KH560 had the best improvement effect on the mechanical properties and hydrophobicity of WAR membranes. Adding only 0.3 wt% KH560 modified NFC could increase the tensile strength of WAR film by 131.9%, and the WCA of the film could be increased from 85.2° to 101.6°, which makes this study beneficial for promoting the application of nanofibrillated cellulose in WAR.

中文翻译：

纳米原纤化纤维素的硅烷改性及其对水性丙烯酸树脂性能的影响

纳米原纤化纤维素（NFC）作为改善水性树脂机械性能的纳米填料引起了极大的关注。本研究通过机械原纤化制备NFC，然后分别用三种不同类型的硅烷偶联剂进行改性：γ-氨丙基三乙氧基硅烷(KH550)、γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷(KH560)和γ-(甲基丙烯酰氧基）丙基三甲氧基硅烷（KH570）。将所得NFC及改性NFC与水性丙烯酸树脂(WAR)物理混合，通过流延法制备薄膜。通过马尔文激光粒度仪、扫描电子显微镜对 NFC、硅烷化 NFC 和薄膜进行了分析（分别是SEM）、傅里叶变换红外（FTIR）、热重分析仪（TGA）、水接触角（WCA）、旋转流变仪和功率拉伸仪。结果表明NFCs已成功制备和修饰。KH570改性NFC具有稍小的粒径、较高的绝对Zeta电位和屈服应力值、良好的热稳定性，在溶液中表现出更好的分散和悬浮稳定性。而KH560改性的NFC对WAR膜的力学性能和疏水性的改善效果最好。仅添加0.3 wt%的KH560改性NFC就可以将WAR薄膜的拉伸强度提高131.9%，薄膜的WCA可以从85.2°提高到101.6°，这使得本研究有利于促进纳米原纤化纤维素在WAR中的应用。

更新日期：2023-08-10

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