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  1. 0 資料タイプ別
  2. 01 学術雑誌論文
  1. 070 農学部
  2. 10 学術雑誌論文
  3. 10 査読済論文

Photoyellowing of chemically modified chemithermomechanical pulps (CTMP) from Eucalyptus globulus under various atmospheres

http://hdl.handle.net/10191/30467
http://hdl.handle.net/10191/30467
009377e1-d499-4c3b-b4ef-9fecdbe4e227
名前 / ファイル ライセンス アクション
68_2_143-149.pdf 68_2_143-149.pdf (928.6 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2014-11-19
タイトル
タイトル Photoyellowing of chemically modified chemithermomechanical pulps (CTMP) from Eucalyptus globulus under various atmospheres
タイトル
言語 en
タイトル Photoyellowing of chemically modified chemithermomechanical pulps (CTMP) from Eucalyptus globulus under various atmospheres
言語
言語 eng
キーワード
主題Scheme Other
主題 chemical modification of CTMP
キーワード
主題Scheme Other
主題 CTMP
キーワード
主題Scheme Other
主題 Eucalyptus
キーワード
主題Scheme Other
主題 oxygen
キーワード
主題Scheme Other
主題 photoyellowing
キーワード
主題Scheme Other
主題 UV microspectrophotometer(UMSP)
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Kojima, Yasuo

× Kojima, Yasuo

WEKO 5076

Kojima, Yasuo

Search repository
Kato, Yoshiaki

× Kato, Yoshiaki

WEKO 5077

Kato, Yoshiaki

Search repository
Ishikura, Yukiko

× Ishikura, Yukiko

WEKO 5078

Ishikura, Yukiko

Search repository
Yoon, Seung-Lak

× Yoon, Seung-Lak

WEKO 5079

Yoon, Seung-Lak

Search repository
Ona, Toshihiro

× Ona, Toshihiro

WEKO 5080

Ona, Toshihiro

Search repository
抄録
内容記述タイプ Abstract
内容記述 Chemithermomechanical pulps (CTMP) were prepared from Eucalyptus globulus and photoirradiated, and the responses have been examined by means of ultraviolet (UV) microspectrophotometer. The absorbance in the UV spectra of fiber walls increased in the range of 300 of 350 nm as a result of photoirradiation, indicating the formation of conjugated double-bound systems in the fiber walls. These spectral changes occurred only on the irradiated surface of sheets. CTMP photoirradiation under various atmospheres indicated that the presence of oxygen in the irradiation atmosphere is not necessary for CTMP yellowing. In nitrogen or vacuum, photoyellowing was at the same level as observed under oxygen. This observation was interpreted as a result of direct elimination of proton radicals from free phenolic groups and/or cleavage of β-aryl ether linkages. This induced probably the excited triplet state of α-carbonyl structures in CTMP, which leads to chromophore formation in the absence of oxygen. Reduction of CTMP with sodium borohydride impeded effectively the effects of photoirradiation only in the absence of oxygen. On the contrary, acetylation of CTMP had no effect in the absence of oxygen but led to photobleaching in the presence of oxygen.
書誌情報 Holzforschung
en : Holzforschung

巻 68, 号 2, p. 143-149, 発行日 2014-01
出版者
出版者 Walter de Gruyter
ISSN
収録物識別子タイプ ISSN
収録物識別子 00183830
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA00664822
DOI
識別子タイプ DOI
関連識別子 info:doi/10.1515/hf-2013-0086
著者版フラグ
値 publisher
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