Effective Degree of Fibrillation of Micro-Fibrillated Bamboo Fiber Processed by Stone Mill for Improving Mechanical Properties of PLA Composite
Effective Degree of Fibrillation of Micro-Fibrillated Bamboo Fiber Processed by Stone Mill for Improving Mechanical Properties of PLA Composite
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石磨加工微纤化竹纤维的纤化程度对提高PLA复合材料力学性能的有效影响
DOI：
10.2472/jsms.58.368
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
T. Fujii
中科院分区：
文献类型：
--
作者：
C. Tanaka;K. Okubo;T. Fujii
本文提出了一种通过在竹纤维（BFs）表面进行原纤化来提高竹纤维增强聚乳酸（PLA）复合材料力学性能的有效方法。为改善竹纤维与基体的界面性能，采用纤维粉碎机对碱处理竹浆进行表面原纤化处理。在3种不同条件下研磨竹浆（原纤化碱竹纤维：FAB）。原纤化程度（D.F.）定义为竹纤维的保水性。本研究制备了四种不同的竹纤维，D.F分别为0（纸浆）、3.5、4.3和4.8。将原纤化竹纤维与聚乳酸（PLA）共混，注塑成型FAB/PLA复合材料。研究了原纤化处理对BF/PLA复合材料力学性能的影响，结果表明，竹纤维经大量的（D.F.）处理后，熔融态的FAB/PLA复合材料的粘度增加，结晶速率降低。与原竹浆/PLA复合材料相比，当D.F.选择为3.5，相比，未原纤化的AB/PLA复合材料。在未原纤化的AB/PLA复合材料的断裂面上观察到了表面光滑的纤维的长拔出。但随着D.F.分别是4.3和4.8结果表明，当竹原纤化程度过高时，竹原纤化纤维强度的降低和纤维取向的改变会降低FAB/PLA复合材料的弯曲强度。本文提出了提高竹纤维与PLA基体界面性能的最佳工艺条件。
Current paper proposes an effective technique to improve mechanical properties of bamboo fiber reinforced PLA (Poly Lactic Acid) by fibrillation on the surface of bamboo fibers (BFs). To improve the interfacial properties between bamboo fibers and matrix, the surface of alkali treated bamboo pulp was fibrillated by milling machine. The bamboo pulps were milled under 3 different conditions (Fibrillated Alkali Bamboo fiber : FAB). Degree of fibrillation (D.F.) was defined as water retention of the bamboo fiber. Four types of bamboo fiber were prepared in this study ; the D.F was 0 (pulp), 3.5, 4.3 and 4.8. The FAB/PLA composites were injection molded after fibrillated bamboo fibers were mixed into PLA. The effect of fibrillation on mechanical properties of BF/PLA composite was investigated.The viscosity of melted FAB/PLA was increased and the rate of crystallization decreased when the bamboo fiber was processed with large number of (D.F.). The bending strength and interfacial shear strength of FAB/PLA composites was significantly increased in comparison to that of the original bamboo pulp/PLA composite when the D.F. was selected to 3.5, compared to that of un-fibrillated AB/PLA composites. Long pull-out of the fiber with smooth surface was observed on the fracture surfaces of un-fibrillated AB/PLA composites. However, the bending strength of FAB/PLA composites was decreased when the D.F. was 4.3 and 4.8. The discussion in the paper showed that the decrease in strength of fibrillated bamboo fiber and change of fiber orientation should degrade the bending strength of FAB/PLA composite when the fiber was excessively fibrillated. This paper mentioned the optimum condition was there to enhance interfacial properties between bamboo fiber and PLA matrix.
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热压法制备各向异性羟基磷灰石/聚L-乳酸复合材料
DOI：
--
发表时间：
2006
期刊：
岐阜歯科学会雑誌 32巻2-3号
影响因子：
--
作者：
N.Wkamastu;M.Iijimma;H.Kamemizu;M.Adachi;Y.Doi
通讯作者：
Y.Doi
影响因子：
4.5
作者：
Hiroyuki Yano;S. Nakahara
通讯作者：
Hiroyuki Yano;S. Nakahara
影响因子：
4.5
作者：
Tokoro, Ryoko;Vu, Duc Minh;Fujiura, Takayasu
通讯作者：
Fujiura, Takayasu
DOI：
10.1007/s00339-003-2225-2
发表时间：
2005-01-01
影响因子：
2.7
作者：
Nakagaito, AN;Yano, H
通讯作者：
Yano, H