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學生：謝明修
指導教授：王振乾 博士
Abstract
• 纖維素(cellulose) 為一親水性的奈米補強纖維，難與疏水
性高分子有良好的分散性。
• 一新穎的製造加工相似於造紙技術，可使MFC
(microfibrillated cellulose 微纖纖維素)與PLA均勻的分散並
製成薄片。
• 其製程可適用於一工業規模由於高出產量和快速的脫水的
時代。
cellulose
Introduction
• MFC為一良好的補強材料，微米尺寸纖維的纖維素被奈米
纖維替代是被認為有效的，由於奈米尺寸組成間的作用可
藉由氫鍵或糾纏滲出網絡連結，達到好的分散混合。
• MFC可提升複合物的韌性，然而親水性纖維素的纖維於疏
水性基材中分散是相當困難的，特別是奈米纖維尤甚。
Experimental
• The reinforcing nanofibers consisted of commercially
available MFC, tradename Celish KY-100G produced by
Daicel Chemical
• Industries, Ltd. The semi-crystalline PLA was Terramac
PL01 from Unitika Fibers Ltd.
Experimental
相對MFC 含量
1% polyacrylamide
(PAM)
MFC利用
Waring blender
分散於水中 30s
加入
PLA fibers
攪拌10s
3% PLA/MFC
懸浮液
吸墨紙
篩;濾
脫水
25x25 cm
1st 98℃,
2nd105℃
15min,
除吸附
承載26kg 水1hr
105℃退火1hr
循環水冷卻
疊8層,
180℃熱壓3min
Results and discussion
Results and discussion
Results and discussion
Scanning electron micrographs of a MFC/PLA sheet containing 70 wt% MFC.
The network of tiny MFC fibrils is uniformly adhered to the thick PLA fibers. Arrows
point to PLA fibers.
Results and discussion
Tensile modulus of MFC/PLA composites as a function of MFC fiber content.
Results and discussion
Temperature dependence of the storage modulus of MFC/PLA composites.
Percentages indicate MFC fiber contents.
Results and discussion
Tensile strength of MFC/PLA composites as a function of MFC fiber content.
Results and discussion
Strain at fracture of MFC/PLA composites as a function of MFC fiber content.
Results and discussion
Typical stress–strain curves of MFC/PLA composites at different MFC fiber
contents. Percentages indicate MFC fiber contents.