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作 者:易杰[1,2] 王治权[1] 单志华[1] 陈慧[1]
机构地区:[1]四川大学制革清洁技术国家工程实验室,四川成都610065 [2]四川大学轻纺与食品学院,四川成都610065
出 处:《中国皮革》2011年第17期12-14,21,共4页China Leather
基 金:高等学校博士学科点专项科研基金(200806101041);国家自然科学基金(50903055)
摘 要:通过考察各种配体对电极电势E(Fe(Ⅲ)/Fe(Ⅱ))的影响,确定使Fe(Ⅱ)鞣液稳定性提高的配体。结果表明:硬碱(磷酸根、硝酸根、硫酸根及氯离子)、软碱(氰根)及有机酸根(酒石酸根、柠檬酸根、乙酸根、甲酸根及草酸根),都使E(Fe(Ⅲ)/Fe(Ⅱ))低于771mV,在Fe[Ⅱ]鞣液鞣制时,尽量避免加入硬碱、软碱及有机酸根;交界碱(邻罗菲啉、亚硝酸根及亚硫酸根)能使E(Fe(Ⅲ)/Fe(Ⅱ))高于771mV,能减少Fe(Ⅱ)向Fe(Ⅲ)的转化,在Fe(Ⅱ)鞣液鞣制时,应加入交界碱以增强Fe(Ⅱ)鞣液的稳定,促进Fe(Ⅱ)鞣液的鞣制。The influence of some ligands on the E( Fe( Ⅲ )/Fe(Ⅱ) )of solution was studied and the ligands were confirmed which could enhance the stability of the solution. The results show that the E ( Fe ( Ⅲ ) / Fe ( Ⅱ ) ) of solution with hard base (phosphate radical, nitrate radical, sulfate radical and chloridion) , soft base (cyano) , organic acid radical (dihydroxysuccinic acid radical, citric acid radical, acetate moiety, formate and oxalate) were lower than 771mV. Therefore it is better to avoid using above ligands in Fe( Ⅱ )tanning solution; The E( Fe( Ⅲ )/Fe( Ⅱ ) )of solution with boundary base (Phen, nitrite ion and sulfite ion) is higher than 771mV, which could control the transfer from Fe(Ⅱ )to Fe( Ⅲ ) in Fe( Ⅱ )tanning solution. Boundary base could strengthen Fe ( Ⅱ )solution stability and promote Fe( Ⅱ )tanning solution.
分 类 号:TS529.2[轻工技术与工程—皮革化学与工程]
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