中文摘要：

系统讨论了绿潮浒苔的独特结构和功能特性，旨在制备纳米纤丝化的海藻纤维素和高比表面积的气凝胶材料，并为浒苔的高价值应用提供新的思路。将绿潮肇事种浒苔化学纯化脱去多糖、蛋白、脂肪后。用圆盘胶磨（20000r／min，20min）进行纳米纤丝化。制备出均一直径（大约40nm）和高长径比的Ic纳米纤丝化纤维素。经由叔丁醇置换和冷冻干燥后可以制备出高比表面积（277cm2／g）、密度为23mg／cm3的柔性纳米纤丝化纤维素气凝胶。所有这些结果通过扫描电镜（SEM）、红外光谱仪（FTIR）、X射线衍射仪（XRD）进行分析。在此基础上，采用机械法直接用胶体磨将浒苔原料进行纳米纤丝化，冷冻干燥后制备出全组分的浒苔泡沫材料。

英文摘要：

This paper discusses the special structure and properties of algal cellulose of Ulva prolifera from green tide for preparing nanofibrillated cellulose （NFC） and aerogels with a high specific surface area. Valuable applications of NFC are reviewed for developing novel applications of Ulva prolifera. NFC was prepared using a simple grinding treatment （20000 r/min, 20 min） after the removal of polysaccharide, ester acid, protein and salt. The obtained cellulose I, NFC had a uniform width of approximately 40 nm and a high aspect ratio. Grinding is an effective way to convert raw cellulose to nanofibrils. Furthermore, we also prepared flexible algal cellulose aerogel with a low density （23 mg/cm3） and a high specific surface area （277 cm2/g） after t-BuOH freeze-drying. It is also revealed that t-BuOH freeze-drying is an efficient way to assemble ID NFC to meso-porous materials. All these results were confirmed by SEM, FTIR spectra, and X-ray diffraction profiles. On the basis of that, Ulva prolifera was nanofabrillated without any chemical purification by direct grinding, and algal foam was prepared with freeze-drying to fully use algae from green tide.