金属配合物的合成及其在低温漂白中的应用

合成了1， 4， 7-三甲基-1， 4， 7-三氮杂环壬烷（Me3TACN）的羧酸桥连双核锰配合物（Me3TACN）2Mn2（μ-O）（μ-CH3CO2）] PF6]2.1H2O（MnAcL）和铁配合物（Me3TACN）2Fe2（μ-O）（μ-CH3CO2） 2] PF6]2.1H2O（FeAcL），采用红外光谱（FTIR），元素分析（EA）和热重分析（TGA）证实了其结构；并将这两个配合物作为双氧水的催化剂应用于低温漂白棉针织物中。通过单因素实验，探讨了温度、配合物浓度、双氧水质量浓度及pH值对漂白效果的影响，得优化工艺为：30%H2O2质量浓度10 g/L，配合物MnAcL浓度10 μmol/L（FeAcL 15 μmol/L），渗透剂和稳定剂DTA的质量浓度均为1 g/L，pH值为10，70 ℃下漂白60 min。经配合物MnAcL处理后的织物白度达82.3%，顶破强力保留率为95.5%；而经配合物FeAcL处理后的织物白度为65.7%，顶破强力保留率为96.9%。配合物MnAcL在低温下漂白的织物其白度和润湿性与传统高温工艺相当，而强力保留率明显高于传统工艺。

Synthesis of metal complex and its application in low temperature bleaching

Binuclear manganese complex（Me3TACN）2Mn2（μ-O）（μ-CH3CO2）] PF6]2.1H2O（MnAcL） and iron complex（Me3TACN）2Fe2（μ-O）（μ-CH3CO2） 2] PF6]2.1H2O（FeAcL） of 1,4,7-trimethyl-1,4,7-triazacyclononane containing carboxylato-bridge were synthesized and characterized by FTIR，elemental analysis (EA) and TGA. Low temperature bleaching of cotton knitted fabric with MnAcL and FeAcL as catalyst for H2O2 and effect of key bleaching variables on bleaching performance were investigated in detail. The conditions were optimized as follows: 30% H2O2 10 g/L，complex MnAcL 10 μmol/L （FeAcL 15 μmol/L）， penetrating agent 1 g/L， stabilizer DTA 1 g/L， pH=10；liquor to goods ratio of 20:1，and the process was carried out at 70 ℃ for 60 min. The fabric bleached with MnAcL and FeAcL achieves the whiteness index to 82.3% and 65.7%，and the bursting strength retention is 95.5% and 96.9%，respectively. The whiteness index and wettability of the fabric bleached with MnAcL at low temperature were comparable with those of fabric bleached with the conventional high temperature technique. The bursting strength retention is much better for the fabric bleached at low temperature.