Interfacial effects on the crystallization and surface properties of poly(l-lactic acid) ultrathin films

Akihiro Udagawa, Toshinori Fujie, Yuko Kawamoto, Akihiro Saito, Shinji Takeoka, Toru Asahi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Polymer crystallization affects structural and mechanical properties of polymer thin films. In this study, we focused on the thermal annealing-induced crystallization in semi-crystalline poly(l-lactic acid) (PLLA) ultrathin films (referred as nanosheets) was investigated in terms of interfacial interaction of PLLA with air and substrate. The surface structure of the PLLA nanosheets observed by atomic force microscopy showed that roughness of the air-side surface increased due to crystallization of PLLA under thermal annealing, whereas that of the substrate-side surface changed little. The elastic moduli and the physical adhesiveness of the nanosheets also changed only on the surface of the air side from crystallization, in contrast to the substrate side. The X-ray diffraction studies of the PLLA nanosheets with different thickness showed that the crystalline contents steeply increased below ca. 200 nm. These results indicated that the crystallization was enhanced near the surface of the air side and restricted near that of the substrate side due to the different interfacial association of the polymer chains in the nanosheet.

Original languageEnglish
Pages (from-to)157-161
Number of pages5
JournalPolymer Journal
Volume48
Issue number2
DOIs
Publication statusPublished - 2016 Feb 1

Fingerprint

Ultrathin films
Nanosheets
Lactic acid
Crystallization
Surface properties
Lactic Acid
Substrates
Air
Polymers
Annealing
Crystalline materials
Polymer films
Surface structure
Structural properties
Atomic force microscopy
Elastic moduli
Surface roughness
X ray diffraction
Thin films
Mechanical properties

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Interfacial effects on the crystallization and surface properties of poly(l-lactic acid) ultrathin films. / Udagawa, Akihiro; Fujie, Toshinori; Kawamoto, Yuko; Saito, Akihiro; Takeoka, Shinji; Asahi, Toru.

In: Polymer Journal, Vol. 48, No. 2, 01.02.2016, p. 157-161.

Research output: Contribution to journalArticle

Udagawa, Akihiro ; Fujie, Toshinori ; Kawamoto, Yuko ; Saito, Akihiro ; Takeoka, Shinji ; Asahi, Toru. / Interfacial effects on the crystallization and surface properties of poly(l-lactic acid) ultrathin films. In: Polymer Journal. 2016 ; Vol. 48, No. 2. pp. 157-161.
@article{293a37c3dee04423bf2ddd075dbd312b,
title = "Interfacial effects on the crystallization and surface properties of poly(l-lactic acid) ultrathin films",
abstract = "Polymer crystallization affects structural and mechanical properties of polymer thin films. In this study, we focused on the thermal annealing-induced crystallization in semi-crystalline poly(l-lactic acid) (PLLA) ultrathin films (referred as nanosheets) was investigated in terms of interfacial interaction of PLLA with air and substrate. The surface structure of the PLLA nanosheets observed by atomic force microscopy showed that roughness of the air-side surface increased due to crystallization of PLLA under thermal annealing, whereas that of the substrate-side surface changed little. The elastic moduli and the physical adhesiveness of the nanosheets also changed only on the surface of the air side from crystallization, in contrast to the substrate side. The X-ray diffraction studies of the PLLA nanosheets with different thickness showed that the crystalline contents steeply increased below ca. 200 nm. These results indicated that the crystallization was enhanced near the surface of the air side and restricted near that of the substrate side due to the different interfacial association of the polymer chains in the nanosheet.",
author = "Akihiro Udagawa and Toshinori Fujie and Yuko Kawamoto and Akihiro Saito and Shinji Takeoka and Toru Asahi",
year = "2016",
month = "2",
day = "1",
doi = "10.1038/pj.2015.95",
language = "English",
volume = "48",
pages = "157--161",
journal = "Polymer Journal",
issn = "0032-3896",
publisher = "Nature Publishing Group",
number = "2",

}

TY - JOUR

T1 - Interfacial effects on the crystallization and surface properties of poly(l-lactic acid) ultrathin films

AU - Udagawa, Akihiro

AU - Fujie, Toshinori

AU - Kawamoto, Yuko

AU - Saito, Akihiro

AU - Takeoka, Shinji

AU - Asahi, Toru

PY - 2016/2/1

Y1 - 2016/2/1

N2 - Polymer crystallization affects structural and mechanical properties of polymer thin films. In this study, we focused on the thermal annealing-induced crystallization in semi-crystalline poly(l-lactic acid) (PLLA) ultrathin films (referred as nanosheets) was investigated in terms of interfacial interaction of PLLA with air and substrate. The surface structure of the PLLA nanosheets observed by atomic force microscopy showed that roughness of the air-side surface increased due to crystallization of PLLA under thermal annealing, whereas that of the substrate-side surface changed little. The elastic moduli and the physical adhesiveness of the nanosheets also changed only on the surface of the air side from crystallization, in contrast to the substrate side. The X-ray diffraction studies of the PLLA nanosheets with different thickness showed that the crystalline contents steeply increased below ca. 200 nm. These results indicated that the crystallization was enhanced near the surface of the air side and restricted near that of the substrate side due to the different interfacial association of the polymer chains in the nanosheet.

AB - Polymer crystallization affects structural and mechanical properties of polymer thin films. In this study, we focused on the thermal annealing-induced crystallization in semi-crystalline poly(l-lactic acid) (PLLA) ultrathin films (referred as nanosheets) was investigated in terms of interfacial interaction of PLLA with air and substrate. The surface structure of the PLLA nanosheets observed by atomic force microscopy showed that roughness of the air-side surface increased due to crystallization of PLLA under thermal annealing, whereas that of the substrate-side surface changed little. The elastic moduli and the physical adhesiveness of the nanosheets also changed only on the surface of the air side from crystallization, in contrast to the substrate side. The X-ray diffraction studies of the PLLA nanosheets with different thickness showed that the crystalline contents steeply increased below ca. 200 nm. These results indicated that the crystallization was enhanced near the surface of the air side and restricted near that of the substrate side due to the different interfacial association of the polymer chains in the nanosheet.

UR - http://www.scopus.com/inward/record.url?scp=84957604464&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84957604464&partnerID=8YFLogxK

U2 - 10.1038/pj.2015.95

DO - 10.1038/pj.2015.95

M3 - Article

AN - SCOPUS:84957604464

VL - 48

SP - 157

EP - 161

JO - Polymer Journal

JF - Polymer Journal

SN - 0032-3896

IS - 2

ER -