Structure and Property Gradation from Surface to Bulk of Poly(L-lactic acid)/Poly(D-lactic acid) Blended Films as Estimated from Nanoscratch Tests Using Scanning Probe Microscopy

被引：14

作者：

Kakiage, Masaki ^{[1
]}

Ichikawa, Tomoyuki ^{[1
]}

Yamanobe, Takeshi ^{[1
]}

Uehara, Hiroki ^{[1
]}

Sawai, Daisuke ^{[2
]}

机构：

[1] Gunma Univ, Dept Chem & Chem Biol, Gunma 3768515, Japan

[2] Tokyo Univ Sci, Dept Appl Chem, Shinjuku Ku, Tokyo 1620826, Japan

来源：

ACS APPLIED MATERIALS & INTERFACES | 2010年 / 2卷 / 03期

关键词：

poly(lactic acid) (PLA); stereocomplex crystal; surface functionalization; hierarchical structure; grazing-incidence X-ray diffraction (GIXD) measurement; scanning probe microscopy (SPM) nanoscratch test; ENANTIOMERIC POLY(LACTIC ACID)S; ORIENTED POLY(ETHYLENE-TEREPHTHALATE) FILM; X-RAY-DIFFRACTION; ATOMIC-FORCE MICROSCOPY; NANOMETER LENGTH SCALE; STEREOCOMPLEX FORMATION; POLY(D-LACTIC ACID); MECHANICAL-PROPERTIES; CRYSTALLIZATION BEHAVIOR; PLASTIC-DEFORMATION;

D O I：

10.1021/am900896q

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Structure and property gradation from surface to bulk of poly(L-lactic acid)/poly(D-lactic acid) (PLLA/PDLA) blended films was estimated from nanoscratch tests using scanning probe microscopy (SPM). The PLLA/PDLA blended film was prepared by melting, following isothermal crystallization at 150 degrees C due to the formation of stereocomplex crystal (sc-crystal). Grazing-incidence X-ray diffraction measurements revealed that the fraction of sc-crystal on the surface was higher than that of bulk. Two types of morphologies were observed in an SPM nanoscratch test conducted under a higher applied load: a less-deformed morphology and a plowed-up morphology. These results demonstrate that a hierarchical structure with an sc-microcrystallite networked surface could be developed by optimizing the processing conditions.

引用

页码：633 / 638

页数：6

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