【摘要】 以漂白阔叶木浆为原料,在亚临界乙醇预处理/球磨处理条件下,研究木浆纤维的特性。研究通过有无预处理和改变球磨机球磨时间的方法,考察了木浆纤维、商品NFC及商品NCC的特性,并通过X射线衍射、FI-TR红外光谱衍射和SEM扫描电镜等方法对制备的纳米微纤丝的结晶度、化学结构和形态特征进行表征分析。结果显示:自制NFC,商品NCC和商品NFC的结晶度分别为60.78%,61.36%,58.13%。自制NFC的结晶度处于商品NCC与商品NFC结晶度之间,说明自制的NFC结晶度已达到商品级别;SEM显示,纤维在研究条件下出现分丝帚化并且可以观察到达到纳米级别的微纤化纤维素;在该亚临界乙醇预处理/球磨条件下,最适宜球磨时间为4h。更多还原

【Abstract】 In this study, bleached hardwood pulp was used as raw material to study the properties of wood fibers under sub-critical ethanol pretreatment/ball milling conditions. The properties of wood fibers, commercial NFC and NCC were investigated by means of pretreatment and changing milling time in ball milling. The crystallinity, organic chemical structure and morphological characteristics of wood fibers were also characterized by X-ray diffraction, FI-TR infrared spectroscopy and scanning electron microscopy(SEM). The results showed that the crystallinity of self-made NFC,commercial NCC and NFC are 60.78%, 61.36% and 58.13%, respectively. The crystallinity of self-made NFC is between that of commercial NCC and commercial NFC, which indicates that the crystallinity of self-made NFC can reach commercial grade; SEM showed that the fibers are broomed and micro-fibrillarized cellulose can be observed to reach nano-level under the experimental conditions; the most suitable treating time of sub-critical ethanol pretreatment/ball milling is four hours.更多还原