亚临界二氯甲烷溶剂脱脂对羊毛纤维的影响  

Effect of Subcritical CH2Cl2 Degreasing on Wool Fiber

作　　者：余姗姗[1] 王颖萱 毛博 张宗才[1,2] YU Shanshan;WANG Yingxuan;MAO Bo;ZHANG Zongcai(National Engineering Research Center of Clean Technology in Leather Industry,Sichuan University,Chengdu 610065,China;The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学制革清洁技术国家工程研究中心,四川成都610065 [2]四川大学皮革化学与工程教育部重点实验室,四川成都610065

出　　处：《皮革科学与工程》2022年第1期58-62,共5页Leather Science and Engineering

基　　金：宁夏回族重点研发项目(2019 BFH2007)。

摘　　要：亚临界二氯甲烷溶剂脱脂技术对于绵羊皮脱脂显示出良好的效果,为了探究该技术在毛皮脱脂工艺中应用的可行性,本文采用热重分析、傅里叶红外光谱分析、X射线粉末衍射分析、扫描电镜和超景深显微镜观察等方法,研究了脱脂过程中温度对羊毛纤维热稳定性、大分子链结构、聚集态和表面形态的影响。结果表明,当温度升高时,羊毛纤维热稳定性提高,大分子链结构呈现出从α-螺旋构象转变为β-折叠构象的变化趋势;当脱脂温度高于39℃时,热稳定性明显提高,部分二硫键发生断裂;而且脱脂温度达到41℃时,羊毛纤维表面的脂类物质大部分被清除,鳞片层受到少许损伤。Subcritical CH2Cl2 degreasing technology has shown good results in degreasing sheep skin.In order to explore the feasibility of this technology in the degreasing process of fur,thermogravimetric analysis,Fourier infrared spectroscopy,X-ray powder diffraction analysis,scanning electron microscopy and ultra-depth-of-field microscope observations were used to investigate the effects of temperature on thermal stability,macromolecular chain structure,aggregation state and surface morphology of wool fiber.The results showed that the thermal stability of wool fibers was improved when the temperature increased,and the molecular chain structure showed a changing trend from α-helix conformation to β-sheet conformation.When the temperature was above 39℃,the thermal stability was significantly improved,and partial S-S bonds of wool fiber were broken.When the temperature reached 41℃,most of the lipid substances on the surface of wool were removed with a slight damage to the scale layer.

关 键 词：羊毛纤维 亚临界溶剂 脱脂 温度 热稳定性 

分 类 号：TS55[轻工技术与工程—皮革化学与工程]