Carbohydrate Polymers ( IF 11.2 ) Pub Date : 2020-10-13 , DOI: 10.1016/j.carbpol.2020.117207 Peize Song , Fa Zhou , Feiyang Li , Zhe Han , Lan Wang , Jiana Xu , Bo Zhang , Mengze Wang , Junfeng Fan , Bolin Zhang
Superfine pulverisation (SFP) pretreatment of Lycium barbarum L. leaves was performed to obtain highly crystalline cellulose. Compared with other common pulverisation methods, SFP enhanced cellulosic crystallinity by 18.3 % and 8.4 %, with and without post-acid treatments, respectively. XRD and solid-state NMR analyses showed that SFP facilitated the exposure of amorphous substances (i.e., hemicellulose and lignin) to NaOH and H2O2. Large amounts of silicon (5.5 %) and aluminium (2.1 %) were found to incorporate into the crystalline regions of SFP-produced cellulose. Further FTIR and thermogravimetric analyses revealed that SFP-produced cellulose contained large amounts of hydroxyl groups, affecting the cellulosic crystallinity and thermal stability. These findings demonstrate the potential for SFP to serve as a green technology for production of highly crystalline and mineral-rich cellulose.
中文翻译:
超细粉碎预处理可增强枸杞叶片中纤维素的结晶度
进行枸杞叶片的超细粉碎(SFP)预处理以获得高度结晶的纤维素。与其他常见的粉碎方法相比,SFP经过和不经过后酸处理后,纤维素的结晶度分别提高了18.3%和8.4%。XRD和固态NMR分析表明,SFP促进了无定形物质(即半纤维素和木质素)暴露于NaOH和H 2 O 2。发现大量硅(5.5%)和铝(2.1%)掺入SFP生产的纤维素的结晶区域中。进一步的FTIR和热重分析表明,SFP生产的纤维素含有大量羟基,影响纤维素的结晶度和热稳定性。这些发现表明,SFP有潜力用作生产高度结晶和富含矿物质的纤维素的绿色技术。