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With the rapid development of the textile printing and dyeing industry , scouring and bleaching system of long-term accumulation of energy saving and environmental protection have become increasingly prominent . The high energy consumption of traditional oxygen bleaching process exist , fiber strength reduction in serious fabric feel rough disadvantages such as environmental pollution . Hydrogen peroxide bleaching process due to the high whiteness of the treated fabric , environmental pollution , and is widely used in a variety of fabrics bleaching process . Printing and dyeing industry, research and development of hydrogen peroxide activator system , there are a lot of shortcomings , such as the large amount of low temperature bleach bleach high cost and difficult to be mixed with other additives . Using bleach with the biological enzyme function similar simulation enzyme is an effective way to overcome these shortcomings . Biomimetic systems commonly used in the bleaching of metal porphyrin complexes and two categories of non- porphyrin metal complexes . Metal porphyrin complexes including iron porphyrin and manganese porphyrin and non- porphyrin metal complexes , including the metal phthalocyanine , GIF system , Schiff base metal complexes , copper - amine complexes , binuclear metal complexes . The macrocyclic amine catalyst activity , it is the synthesis and application performance of such catalysts as the direction of this study . In this paper, the five-step synthesis of 1,2 - bis ( 4,7 - dimethyl -1 ,4,7 - triaza ring nonane -1) ethane and manganese metal ligand complexes [ LMn ( III ) (μ-O) 2 (μ-OAc) Mn (Ⅳ)] (CH3COO) 2, and the compounds by elemental analysis , thermal analysis , ultraviolet spectroscopy and infrared spectroscopy to characterize the structure . Bridged cyclic polyamines 1,2 - bis (4,7 - dimethyl -1 ,4,7 - triaza ring nonane -1) ethane manganese complexes used in cotton knitted fabric hydrogen peroxide low temperature immersion catalytic bleach , complex concentration , pH value , the concentration of hydrogen peroxide quality , five factors of time and temperature on the bleaching effect . By single factor and orthogonal experiments , the study of the complex catalysis of hydrogen peroxide low temperature bleaching of cotton knitted , and have to optimize the process as follows : 30 % H202 dosage of 10 g / L , with the concentration of 30μmol / L , pH = 12.5 , temperature 80 ° C , the stabilizer concentration 1g / L , the penetrant concentration 1g / L . Treatment by this process , the fabric whiteness of 68.94% , and the bursting strength retention rate of 85.93% .
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