Calotropis procera fiber (CPF) is the fruit fiber of C. procera and belongs to a typical cellulosic fiber. In this study, Calotropis procera fiber (CPF) was first purified in the pretreatment process including delignification and bleaching before the isolation of cellulose nanocrystal. Chemical composition of Calotropis procera fiber was determined according to TAPPI standard method. It was composed of 64.0 wt% cellulose, 19.5 wt% hemicelluloses, and 9.7 wt% of lignin. The morphology of the Calotropis procera fiber and fiber after each pretreatment process was also investigated. Cellulose nanocrystal was extracted by classical sulfuric acid hydrolysis of the pretreated Calotropis procera fiber. TEM and SEM were used to analyze the morphologies of the obtained CNC. The crystallinity, thermal stability and suspension stability of the CNC were also investigated. The interesting results proved that this under-utilized biomass could be exploited as a new source of cellulose raw material for the production of cellulose nanocrystal.

中文翻译：

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proco procera生物质提取纤维素纳米晶的制备与表征。

牛角瓜属的Procera纤维（CPF）是的水果纤维C.的Procera和属于典型的纤维素纤维。在这项研究中，Calotropis procera纤维（CPF）首先在预处理过程中进行纯化，包括脱木质素和漂白，然后再分离出纤维素纳米晶体。根据TAPPI标准方法测定Calotropis procera纤维的化学成分。它由64.0 wt％的纤维素，19.5 wt％的半纤维素和9.7 wt％的木质素组成。还研究了Calotropis procera纤维和每个预处理过程后的纤维的形态。通过预处理的Calotropis procera的经典硫酸水解法提取纤维素纳米晶体纤维。用TEM和SEM分析所得CNC的形态。还研究了CNC的结晶度，热稳定性和悬浮稳定性。有趣的结果证明，这种未被充分利用的生物质可以被用作生产纤维素纳米晶体的纤维素原料的新来源。