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Influence of microwave on chromium complex composition in tanning liquor

Journal of Leather Science and Engineering 2020年第1期2卷 95-105页

作者： Jinwei Zhang Wuyong Chen carmen gaidau Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan UniversityChengdu 610065China College of Biomass Science and Engineering Sichuan UniversityChengdu 610065China R&D National institute for Textile and Leather-Division Leather and Footwear Research Institute 031215 BucharestRomania

Since microwave irradiation could promote hydrolysis and olation of chromium tanning liquor,but the influence of microwave on chromium complex component in the liquor was still *** sulphate solution(0%basicity)and 33%basicity chromium tanning liquor were subjected microwave(MW)and water bath(WB)heating,and the samples without any warming were regarded as *** exchange chromatography(IEC)and gel filtration chromatography(GFC)were used to measure the charge composition and molecular size of chromium complexes in each ***-IR was used to characterize the structure of chromium complexes in each composition separated by ***,the chromium tanning liquor after warming was used in hide powder tanning trials to illustrate whether microwave would affect its tanning *** results show there are more high positive charge and large molecular size complexes in chromium tanning liquor after warming but the phenomena are more significant in MW samples compared with WB due to non-thermal effect of *** addition,microwave has more powerful effect on 33%basicity chromium tanning liquor hydrolysis and olation to generate larger molecular size *** FT-IR results,the combination pattern between chromium and ligands are changed after warming but there is no difference between WB and *** chromium exhaustion and thermal stability of hide powder tanned with chromium tanning liquor after microwave irradiation are both *** could conclude that both thermal and non-thermal effects of microwave promote the process together,and the nonthermal effect leads to more high positive charge and large molecular size complexes and has stronger influence on high polarity *** short,this work would provide theoretical basis for applying microwave in tanning agent modification and chrome tanning process further.

关键词： Microwave Chromium tanning liquor Chromium complex Ion exchange chromatography Gel filtration chromatography

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Aluminum tanning of hide powder and skin pieces under microwave irradiation

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Journal of Leather Science and Engineering 2020年第1期2卷 279-291页

作者： Yue Liu Bin Song Jinwei Zhang carmen gaidau Haibin Gu Key Laboratory of Leather Chemistry and Engineering of Ministry of Education Sichuan UniversityChengdu 610065China National Engineering Research Center of Clean Technology in Leather Industry Sichuan UniversityChengdu 610065China Leather Research Department The Research and Development National Institute for Textiles and Leather-Division Leather and Footwear Research Institute93Ion Minulescu StrBucharest3Romania

The application and mechanism study of microwave irradiation in traditional industries have attracted considerable attention owing to the unique thermal and athermal effects that could lead to unexpected benefits in high-efficiency and clean ***,we report the investigation of the aluminum tanning under microwave irradiation upon using hide powder and skin pieces,respectively,as simulants of real hide or *** aluminum tanning process and the tanned products under microwave heating(MWH)were studied and compared with those of conventional water bath heating(WBH)as the *** the tanning system of hide powder,the tanning effluents were analyzed in terms of pH,conductivity,dielectric constant and aluminum content,and the tanned powder was investigated by differential scanning calorimetry(DSC),thermogravimetric(TG)analysis,and FT-IR *** the skin piece system,the pH and aluminum content of tanning effluents were also determined,and at the same time,DSC,TG,SEM,FT-IR and shrinkage temperature were used to illustrate the actions of microwaves on the structure and properties of the tanned *** results show that aluminum reactivity in the penetration and binding process of collagen fibers in hide powder and skin pieces improved using microwave *** residual aluminum content was greatly reduced by microwave heating action,and the increased amount of aluminum with evener distribution was observed in the tanned *** irradiation also resulted in the tanned products with better thermal stability and thermal decomposition *** work further promotes application of microwave treatments for aluminumbased tanning in leather industry.

关键词： Microwave Aluminum tanning Hide powder Skin pieces Thermal effect Non-thermal effect

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微波辐照在皮革工业中的应用研究现状

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皮革科学与工程 2019年第5期29卷 33-39,59页

作者：龙燕茹刘月 carmen gaidau 辜海彬皮革化学与工程教育部重点实验室(四川大学) 四川成都610065 制革清洁技术国家工程实验室(四川大学) 四川成都610065 R&D National Institute for Textiles and Leather(INCDTP) Leather and Footwear Research Institute(ICP)Division93Ion Minulescu streetBucharest031215Romania.

作为一种新型、清洁、高效的热源,微波在皮革工业中的应用已经引起人们的研究兴趣,其热效应和非热效应对皮革加工过程及鞣革性能的影响是人们关注的焦点。本文将对微波辐照在皮革的主要工序,包括干燥、染色、加脂和鞣制等的应用研究进... 详细信息

作为一种新型、清洁、高效的热源,微波在皮革工业中的应用已经引起人们的研究兴趣,其热效应和非热效应对皮革加工过程及鞣革性能的影响是人们关注的焦点。本文将对微波辐照在皮革的主要工序,包括干燥、染色、加脂和鞣制等的应用研究进行系统总结,并指出现有研究中存在的不足,为将微波技术有效地应用于皮革加工过程提供参考。

关键词：微波皮革工业热效应非热效应干燥染色加脂鞣制

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