稻秸秆纤维素纳米纤维增强聚乙烯醇复合薄膜。
Rice straw cellulose nanofibrils reinforced poly(vinyl alcohol) composite films.
机构信息
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
出版信息
Carbohydr Polym. 2018 Oct 1;197:442-450. doi: 10.1016/j.carbpol.2018.06.025. Epub 2018 Jun 14.
In this study, cellulose nanofibrils (CNFs), obtained from the chemical treatment of steam exploded rice straw fibers and the following oxidation by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated system, were utilized to prepare the reinforced polyvinyl alcohol (PVA) composite films by solution casting method, and the morphology, transparency, thermal stability, mechanical properties and water absorption of these rice straw CNFs/PVA composite films were also investigated compared with the rice straw cellulose microfibrils (CMFs) reinforced PVA composite films. As compared with the rice straw CMFs/PVA composite films, the rice straw CNFs/PVA composite films exhibited more uniform fiber dispersion, better mechanical properties and transparency, and similar thermal stability. However, the rice straw CNFs/PVA composite films showed weaker water resistance than the rice straw CMFs/PVA composite films due to the existence of more polar groups in rice straw CNFs.
在这项研究中，利用化学处理蒸汽爆破稻草纤维得到的纤维素纳米纤维（CNFs），并通过 2,2,6,6-四甲基哌啶-1-氧基自由基（TEMPO）介导的系统进行后续氧化，通过溶液浇铸法制备了增强型聚乙烯醇（PVA）复合薄膜，并对这些稻草 CNFs/PVA 复合薄膜的形态、透明度、热稳定性、机械性能和吸水性进行了研究，与稻草纤维素微纤维（CMFs）增强 PVA 复合薄膜进行了对比。与稻草 CMFs/PVA 复合薄膜相比，稻草 CNFs/PVA 复合薄膜表现出更均匀的纤维分散性、更好的机械性能和透明度，以及相似的热稳定性。然而，由于稻草 CNFs 中存在更多的极性基团，稻草 CNFs/PVA 复合薄膜的耐水性比稻草 CMFs/PVA 复合薄膜差。
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