壳聚糖纳米纤维/PMMA复合材料的制备及性能分析  

Preparation and Property Study on Chitosan Nanofiber/PMMA Composites

作　　者：陈楚楚[1] 李大纲[1] 

机构地区：[1]南京林业大学材料科学与工程学院,江苏南京210037

出　　处：《塑料工业》2013年第12期21-24,28,共5页China Plastics Industry

基　　金：国家自然基金(31170514);博士生导师基金(2011320411011);江苏省优势学科

摘　　要：利用壳聚糖(Chitosan)纳米纤维对聚甲基丙烯酸甲酯(PMMA)进行增强改性,通过浸渍法制备Chitosan/PMMA复合薄膜材料,并利用傅里叶红外光谱(FTIR)、场发射扫描电子显微镜(FE-SEM)、热性能分析仪(DMA、TMA)、紫外分光光度计等对其性能进行表征。结果表明,浓碱处理甲壳素能够获得壳聚糖;薄膜的断面呈现明显的层状结构;Chitosan/PMMA复合材料的透光率比纯纤维膜提高了约11%;在PMMA中添加壳聚糖纳米纤维能够显著降低树脂的热膨胀系数(CTE),在20～100℃的范围内,添加60%壳聚糖纳米纤维的复合材料的CTE为33.85×10-6K-1,接近于纯PMMA树脂CTE的1/6;Chitosan/PMMA复合样品的储能模量达到了6 GPa,较纯PMMA增加了2倍。Chitosan nanofibers reinforced polymethylmethacrylate （PMMA） composites were prepared by immersion method in which the PMMA was modified by chitosan. The properties of the Chitosan/PMMA samples were investigated through Fourier transform infrared spectroscopy, field-emission electron microscope （FE-SEM）, thermal performance analyzer, and ultraviolet spectrophotometer. The results demonstrated that chitosan could be obtained through NaOH treatment, the fracture surface of the films were highly uniform with fine layer structure. Compared with pure chitosan nanofiber film, the light transmission of the obtained composite was increased by 11%. Furthermore, the addition of chitosan nanofiber significantly improved the CTE of the neat PMMA resin to 33.85 × 10 -6 K -1 at 20 - 100 ℃ with the fiber content of 60%, which was about as the 1/6 than that of the neat resin. The storage modulus of Chitosan/PMMA was up to 6 GPa, as twice much as the neat PMMA.

关 键 词：壳聚糖纳米纤维 聚甲基丙烯酸甲酯 复合材料 增强改性 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]