工业大麻秆纳米纤维素的制备

Study on the Preparation Process of Industrial Hemp Stalk Nanocellulose

关键词:  工业大麻秆  纤维素  纳米纤维素  TEMPO氧化

Key Words:industrial hemp stalk  cellulose  nanocellulose  TEMPO oxidation

摘要:为实现工业大麻秆的高附加值利用，本研究以工业大麻秆为原料，通过测定化学组分，表明其高纤维素含量（41.45%）的基本特性，证实其制备纳米纤维素的可能性。采用TEMPO-NaBr-NaClO催化氧化体系配合超声制备了氧化纳米纤维素（TCNF），并研究其在制备过程中各阶段的形貌、化学结构、结晶度及热稳定性。结果表明，以工业大麻秆为原料制备的TCNF，其直径均匀分布在3~6 nm，保留了纤维素典型的Ⅰ型结构，结晶度为50.8%，具有较好的热稳定性。

Abstract:In order to realize the high added value utilization of industrial hemp stalk， this study used industrial hemp stalk as raw material. By measuring the chemical components of the raw material， the basic characteristic of high cellulose content（41.45%）was shown， and the possibility of preparing nanocellulose was confirmed. Combined with ultrasound， the oxidized nanocellulose（TCNF）was prepared by TEMPO-NaBr-NaClO catalytic oxidation system. The morphology， chemical structure， crystallinity and thermal stability of TCNF in each stage of the preparation process were studied. The results showed that the TCNF prepared from the industrial hemp stalk had a uniform distribution of 3~6 nm in diameter， retained the typical Ⅰ-type structure of cellulose， had a crystallinity of 50.8%， and had good thermal stability.