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https://hdl.handle.net/20.500.14094/90004809
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2024-04-26
00:54 集計
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90004809 (fulltext)
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メタデータID
90004809
アクセス権
open access
出版タイプ
Accepted Manuscript
タイトル
Effect of the graft density of cellulose diacetate-modified layered perovskite nanosheets on mechanical properties of the transparent organic-inorganic hybrids bearing covalent bonds at the interface
その他のタイトル
Investigation of the effect of the graft density of cellulose diacetate-modified layered perovskite nanosheets on mechanical properties of the transparent organic-inorganic hybrids bearing covalent bonds at the interface
著者
Sato, Satoru ; Shintani, Kenji ; Idota, Naokazu ; Nishino, Takashi ; Sugahara, Yoshiyuki
著者名
Sato, Satoru
著者名
Shintani, Kenji
著者名
Idota, Naokazu
著者ID
A0895
研究者ID
1000040180624
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=d9f2afbd2435a4b2520e17560c007669
著者名
Nishino, Takashi
西野, 孝
ニシノ, タカシ
所属機関名
工学研究科
著者名
Sugahara, Yoshiyuki
収録物名
Cellulose
巻(号)
24(12)
ページ
5463-5473
出版者
Springer
刊行日
2017-12
公開日
2019-01-01
抄録
Transparent organic–inorganic hybrids with a whitish colour were prepared from cellulose diacetate (CDA) nanosheets derived from Dion–Jacobson-type ion-exchangeable layered perovskite HLaNb2O7·xH2O (HLaNb) to prepare CDA-based hybrids bearing covalent bonds between HLaNb nanosheets and CDA matrices for improved mechanical properties. An n-decoxy derivative of HLaNb (C10_HLaNb) was exfoliated in acetonitrile by ultrasonication. TEM and AFM images revealed that C10_HLaNb was exfoliated into individual nanosheets. In order to explore the local environment around HLaNb nanosheets, a very small amount of CDA was reacted with a C10_HLaNb nanosheet dispersion [molar ratio COH:(NbOH+NbOC10H21) = 4:1] at 80°C, and solid-state 13C NMR with cross polarization and magic angle spinning techniques showed that an alcohol-exchange-type reaction was proceeded to graft the CDA chains to the HLaNb nanosheets via new Nb–O–C covalent linkages. The CDA-based hybrids were prepared by dispersing 5 mass% of HLaNb nanosheets in CDA and subsequent heating at 80 °C for 1–7 days to cause a grafting reaction, and the product prepared by a 1-day grafting reaction exhibited improved mechanical properties compared to neat CDA; the Young’s modulus, tensile strength and toughness increased by 18, 34 and 78%, respectively. The mechanical properties deteriorated with further extension of the reaction period, however. In addition, a hybrid film prepared by mixing CDA and a C10_HLaNb nanosheet dispersion exhibited only a slight improvement in mechanical properties. These results clearly indicate that formation of an appropriate number of Nb–O–C bonds at the nanosheet/CDA interfaces is effective for improving mechanical properties.
キーワード
Cellulose diacetate
Layered perovskite
Nanosheet
Nb-O-C bond
Organicinorganic hybrid
Mechanical properties
カテゴリ
工学研究科
学術雑誌論文
権利
© Springer Science+Business Media B.V. 2017. This is a post-peer-review, pre-copyedit version of an article published in Cellulose. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10570-017-1475-7
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資源タイプ
journal article
言語
English (英語)
ISSN
0969-0239
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eISSN
1572-882X
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関連情報
DOI
https://doi.org/10.1007/s10570-017-1475-7
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