摘要
以毛竹(Phyllostachys heterocycla cv.Pubescens)为原料,采用落球法制备纳米纤丝化纤维素(NFC)球形水凝胶,溶剂置换和超临界CO2干燥后得到了NFC球形气凝胶。通过透射电子显微镜(TEM)、扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)和BET对NFC球形气凝胶的微观形貌、化学态、结晶结构和孔隙结构进行表征分析。研究结果表明,NFC水凝胶和气凝胶均为球形,其化学组成和结晶结构均与天然纤维素一致,NFC气凝胶的骨架通过丝状纳米纤丝化纤维素缠绕和聚集形成三维网络结构,NFC气凝胶具有较高的比表面积和孔隙体积,分别为173 m2/g和0.62 cm3/g。
Nanofibrillated cellulose （NFC） spherical hydrogel is prepared by falling ball method with Phyllostachys heterocycla cv. Pubescens as raw material. The NFC spherical aerogel is obtained by solvent replacing and supercritical CO2 drying method. Micromorphology, chemical state, crystalline structure and pore structure of NFC spherical aerogel are analyzed by transmission electron microscopy （ TEM ）, scanning electron microscopy （ SEM ）, Fourier transform infrared （FTIR） ,X-ray diffraction （XRD） and BET. The results show that NFC hydrogel and aerogel are spherical. The chemical composition and crystalline structure of NFC hydrogel and aerogel are consistent with that of natural cellulose. The skeleton of NFC aerogel is a three-dimensional network structure formed by filamentous NFC enwinding and gathering. The specific surface area and pore volume of NFC aerogel are 173 m^2E/g and 0. 62cm^3/g, respectwely.
出处
《现代化工》
CAS
CSCD
北大核心
2015年第3期62-65,共4页
Modern Chemical Industry
基金
中央高校基本科研业务费专项资金资助项目(2572014EB01-02
2572014AB20)
国家自然科学基金资助项目(31070633)
