Grant-in-Aid for Scientific Research (B).
|Research Institution||Otsuma Women's University, Junior College|
OKADA Yasuyo Otsuma Women's University, Junior College, Faculty of Home Economics, Professor., 家政学部, 教授 (90118729)
桧原 利夫 ダイスタージャパン株式会社テクニカルサービスラボラトリー, 所長
姫野 清 ダイスタージャパン株式会社, 研究所, 所長(研究職)
森田 全三 東京農工大学, 名誉教授 (50016408)
渡辺 亜紀 大妻女子大学短期大学部, 家政学部, 助手
檜原 利夫 ダイスタージャパン株式会社, テクニカルセンター, 所長(研究職)
高野 梓 大妻女子大学短期大学部, 家政学部, 助手
HIMENO Kiyoshi DyStar Japan Ltd., Research Center, General Manager
HIHARA Toshio DyStar Japan Ltd., Technical Center, General Manager
TAKANO Azusa Otsuma Women's University, Junior College, Faculty of Home Economics, Research Assistant
|Project Fiscal Year
1998 – 2000
Completed(Fiscal Year 2000)
|Budget Amount *help
¥9,500,000 (Direct Cost : ¥9,500,000)
Fiscal Year 2000 : ¥1,000,000 (Direct Cost : ¥1,000,000)
Fiscal Year 1999 : ¥1,500,000 (Direct Cost : ¥1,500,000)
Fiscal Year 1998 : ¥7,000,000 (Direct Cost : ¥7,000,000)
|Keywords||Photofading / Lightfastness / Disperse dyes / Poly(ethylene terephthalate) / Nylon / Triphenodioxazine dyes / Aggregation on cellulose / Reaction with oxidizing agent / 光退色 / 耐光性 / 分散染料 / ポリエステル繊維 / ナイロン / トリフェノジオキサジン染料 / セルロース上の集合 / 酸化剤との反応 / アゾ分散染料 / ポリアミド繊維 / 還元退色 / 酸化退色 / トリフェノジオキサジン反応染料 / 集合 / 半経験的分子軌道法 / 一重項酸素 / 次亜塩素酸塩 / 置換基効果 / 反応染料 / アルカリ加水分解 / 窒素酸化物堅ろう度 / ポリエステル / 光還元 / 光酸化 / 退色挙動|
Reactivity of an aminopyrazolinyl azo reactive dye, used for the estimation of photosensitivity of many reactive dyes, was examined by PM3 semi-empirical molecular orbital method to show the position of reaction with singlet molecular oxygen, the reaction paths, and the relative reactivity of typical monoazo dyes.
The photofading behavior of six monoazo disperse dyes on poly(ethylene terephthalate)(PET)and nylon 6 films and fabrics was examined under aerobic and anaerobic conditions. The dyes underwent reductive fading even under aerobic conditions, with a few exceptions. Exposing nylon films dyed with the disperse dyes in combination with a vinylsulfonyl copper-phthalocyanine dye(CuPc), when immersed in aerated or O_2-saturated water, showed a decrease in the rate of reductive fading compared with exposures involving disperse dyes without CuPc. Singlet oxygen generated by the photosensitization of CuPc suppressed the reductive fading of disperse dyes. Nylon has stronger influence to un
dergo photo-reduction and photo-oxidation on disperse dyes than PET has, depending upon the potential properties of dye itself. High lightfastness in disperse dyes requires ^1O_2-suppressed photo-reduction due to their self-photosensitization during exposures involving aerobic conditions.
Monomer-dimer equilibriums of triphenodioxazine reactive dyes with vinylsulfone anchors(PVS-TPDO)and monochlorotriazine anchors(MCT-TPDO)were investigated in water, in aqueous organic solvent, and on a cellulosic substrate. The aggregation tendency of PVS-TPDO in water was promoted by the addition of neutral electrolyte and suppressed by that of 1-methyl-2-pyrrolidone(MP). PVS-TPDO showed also aggregation on a cellulosic substrate. The apparent value of K on dry cellulose was two orders of magnitude smaller than that in water, and was increased by about ten times by water. Four TPDO dyes examined showed the same order of aggregation tendency on cellulosic and nylon substrates as that in aqueous solution.
The reaction of four triphenodioxazine(TPDO)reactive dyes on cellulosic films with bleaching agents, hypochlorite and hydrogen peroxide(HP), was examined in the aqueous solutions and redox potentials for two dyes were measured by cyclic voltammetry. The reaction of TPDO dyes on cellulosic films with HP at different pHs implied a nucleophilic reaction with HP anions, while the reaction with hypochlorite an electrophilic one with undissociated species of hypochlorite and a nucleophilic one with hypochlorite anion, although the relative reactivity among TPDO dyes was attributed mainly to the electrophilic one. The rates of hypochlorite bleaching for 4, 11-bis(vinylsulfonyl)TPDO dyes on cellulosic film were smaller than those for 3, 10-bis(disubstituted triazinyliminoethylimino)TPDO dyes, while the rates of HP bleaching showed the reverse relation. Less