Preparation of Biopolymer Composite Using Cedar‐Derived Cellulose Nanofibers
Preparation of Biopolymer Composite Using Cedar‐Derived Cellulose Nanofibers
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DOI：
10.1007/s12649-021-01436-8
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发表时间：
2021-04
影响因子：
3.2
通讯作者：
C. Asada;M. Seno;Y. Nakamura
中科院分区：
文献类型：
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作者：
C. Asada;M. Seno;Y. Nakamura
摘要采用环境友好的水蒸汽预处理和碾磨预处理方法，对雪松进行预处理，制备纤维素纤维素纤维（CNF）。处理后的雪松先用水提取，再用丙酮提取，然后用NaClO 2处理，分离出挥发性成分、水溶性成分、丙酮溶性成分、NaClO 2可溶性成分和NaClO 2不溶性成分（CNF制备的原料）。从实验数据中提取的成分的量和聚合度的蒸汽压力对处理后的雪松的性质的影响进行了研究。在15 atm的蒸汽压力下蒸汽处理5 min，然后研磨处理10 s，从雪松获得的CNF的性质与商业CNF（BiNFi-s）的性质几乎相同。结果表明，在此处理条件下，CNF对PLA的增强效果明显，PLA/CNF复合材料的比拉伸强度和比弹性模量分别为58.1 MPa/g/cm 3和7.56 GPa/g/cm 3，分别是PLA的33.0 MPa/g/cm 3和2.44 GPa/g/cm 3的1.6倍和3.1倍。
AbstractSteam treatment followed by milling treatment, an environmentally friendly method, was used and evaluated as a pretreatment of cedar for the preparation of cellulose nanofiber (CNF). The treated cedar was extracted with water followed by acetone and then received sodium chlorite (NaClO2) treatment, and separated into volatile component, water soluble component, acetone soluble component, NaClO2soluble component, and NaClO2insoluble component (a raw material of CNF preparation). The effects of steam pressures on the properties of treated cedar were examined from experimental data for the amounts of extracted components and the degree of polymerization. The properties of CNF obtained from cedar that was steam-treated at a steam pressure of 15 atm for a steaming time of 5 min and then milling-treated for 10 s were almost the same as those of commercial CNF (BiNFi-s). The reinforcing effect of CNF obtained in this treament condition was clarified, and the specific tensile strength and the specific Young’s modulus of PLA/CNF composite were 58.1 MPa/g/cm3and 7.56 GPa/g/cm3that corresponded to 1.6 and 3.1 times higher than those of PLA only, i.e. 33.0 MPa/g/cm3and 2.44 GPa/g/cm3, respectively.Graphic Abstract