用于由TEMPO氧化纤维素纳米纤维制成的光学透明纸膜表面改性的SI ATRP

SI ATRP for the Surface Modifications of Optically Transparent Paper Films Made by TEMPO-Oxidized Cellulose Nanofibers.

作者信息

Chen Jem-Kun, Huang Hsiang-Ya, Tu Cheng-Wei, Lee Li-Ting, Jamnongkan Tongsai, Huang Chih-Feng

机构信息

Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.

Department of Chemical Engineering, i-Center for Advanced Science and Technology (iCAST), National Chung Hsing University, Taichung 40227, Taiwan.

出版信息

Polymers (Basel). 2022 Feb 26;14(5):946. doi: 10.3390/polym14050946.

Applications of cellulose nanofibers currently match the demands of biodegradable and renewable constituent biocomposites. In this study, we studied the process of preparing TEMPO-oxidized cellulose nanofibers (TOCNs). These nano-sized cellulose fibers (ca. 11 nm) can be fabricated to high transmittance and optically transparent paper (OP) films. Then the OP films can be facilely immobilized initiating sites for the subsequent surface-initiated atom transfer radical polymerization (SI ATRP). We investigated SI ATRP with styrene (St) kinetics and monitored chemical structure changes of the OP surfaces. The obtained OP--PSt significantly led to enhance thermal stability and alter the OP surface with hydrophobic compared to that of pristine OP film. Characterization was studied by Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), UV-Vis spectroscopy, thermogravimetric analyzer (TGA), and water contact angle (WCA) measurements.

纤维素纳米纤维的应用目前符合可生物降解和可再生成分生物复合材料的需求。在本研究中，我们研究了制备TEMPO氧化纤维素纳米纤维（TOCNs）的过程。这些纳米尺寸的纤维素纤维（约11纳米）可以制成高透光率和光学透明的纸（OP）薄膜。然后，OP薄膜可以很容易地固定引发位点，用于后续的表面引发原子转移自由基聚合（SI ATRP）。我们研究了以苯乙烯（St）为动力学的SI ATRP，并监测了OP表面的化学结构变化。与原始OP薄膜相比，所得的OP-PSt显著提高了热稳定性，并使OP表面具有疏水性。通过傅里叶变换红外光谱（FT-IR）、粉末X射线衍射（XRD）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、紫外-可见光谱、热重分析仪（TGA）和水接触角（WCA）测量进行表征。