一种可能的制革体系:三元溶剂(水-乙醇-乙酸乙酯)在制革中的应用  

Use of ternary solvent( water-ethanol-ethyl acetate) medium for leather processing: A possible paradigm change

作　　者：Solomon Fessehaye Bhargavi Narayana Reddy Gari Rathinam Aravindhan Kalarical Janardhanan Sreeram Jonnalagadda Raghava Rao1 Balachandran Unni Nair 王玉增(译) WANG Yuzeng(Chemical Laboratory,CSIR-Central Leather Research Institute,Adyar,Chennai,India Leather Technology Directorate,Leather Industry Development-Institute 24692 code 1000,Addis Ababa Ethiopia;Siehuan University,Chengdu 610065,China)

机构地区：[1]中央皮革研究所科学与工业研究中心化学实验室,钦奈安达亚,印度皮革技术局 [2]皮革行业发展研究所24692代码1000 [3]四川大学

出　　处：《中国皮革》2019年第2期43-44,45-50,52,共4页China Leather

摘　　要：报道了一种尝试利用三元混合溶剂代替水(7～10 m^3/t)在制革中的应用,该混合溶剂具有比水更低的沸点(便于通过蒸发回收),对传统染料、合成鞣剂及加脂剂具有较大溶解度。该三元混合溶剂(水-乙醇-乙酸乙酯)对制革试剂具有较好的溶解分散能力,合成鞣剂及染料在混合溶剂和水中的平均分散粒子大小是一样的,但是混合溶剂对染料及合成鞣剂粒子的分散更有利,即在混合溶剂中分散性更好。试验发现,与传统方法相比,鞣制后的中和过程在混合溶剂中使用中和合成鞣剂更容易获得性能优异的皮革。在水和混合溶剂中进行的染料吸附试验符合弗罗德利克吸附理论,说明染料的吸附是多分子层吸附。试验组的皮革的物理性能与对照组非常相似,说明该混合溶剂不会对胶原产生不利影响,并且对制革试剂具有较好的分散和固定作用。因此,该方法可以通过对制革生产工序中小的改变,提供有效的节水方案。An attempt to replace water(7~10 m^3/ton)in leather processing with a ternary mixture of solvents that would have a lower boiling point than water(for easy recovery through evaporation)and.also bring about maximum solubility of conventional dyes,syntans and fatliquors is reported.The,ternary mixture(Water-ethanol-ethyl acetate)reported in this study provided for good solubility/dispersion of leather chemicals.Average particle size of the syntan/dye in solvent/water remaining the same,particle size distribution of dyes and syntans was advantageous in the solvent medium,leading to better diffusion.Amongst various trials,neutralization of the leathers after tanning in solvent medium followed by use of neutralization syntans was found to be more advantageous to obtain leather properties compara-ble to conventional controls.The adsorption studies of dye used in the present study followed Freundlich model in both solvent and water medium indicates multilayer adsorption.Physical properties of the leathers were similar to that of control,indicating clearly that the solvent had no adversary effect on collagen and also provided for good diffusion and fixation of chemicals.The method thus reported in this study could provide for a minimum change approach to leather processing with ample contribution to water saving.

关 键 词：三元混合溶剂 弗罗德利希吸附模型 扩散 

分 类 号：TS54[轻工技术与工程—皮革化学与工程]