大麻纤维草酸铵-酶联合脱胶工艺

为开发绿色高效的大麻脱胶工艺,提出了草酸铵-酶联合脱胶,采用正交试验优化草酸铵脱胶工艺,并与经传统化学脱胶工艺、化学-酶联合脱胶工艺处理后大麻纤维的脱胶效果进行比较,得到草酸铵-酶联合脱胶最佳工艺条件:草酸铵质量浓度为4.0 g/L,保温温度为100 ℃,保温时间为50 min。结果表明:经最佳工艺处理后大麻纤维的残胶率为2.34%,低于经传统化学脱胶后大麻纤维的残胶率12.88%和化学-酶联合脱胶后大麻纤维的残胶率8.43%;草酸铵-酶联合脱胶后大麻纤维中木质素质量分数由8.10%(大麻原麻)下降到0.94%,断裂强度为10.31 cN/dtex,且白度优于传统化学脱胶工艺和化学-酶联合脱胶工艺处理后的大麻纤维。

Ammonium oxalate-enzyme combining degumming process of hemp fiber

In order to develop a green and efficient hemp degumming process, a combining degumming process using ammonium oxalate and enzyme was proposed. The ammonium oxalate degumming process was optimized using the orthogonal test, and the degumming effect of hemp fiber treated by ammonium oxalate-enzyme method was compared with that of hemp fiber treated by the traditional chemical method and that of hemp fiber treated by the chemical-enzyme method. Results show that the optimum conditions of ammonium oxalate-enzyme combining degumming method are the concentration of ammonium oxalate is 4.0 g/L, holding temperature is 100 ℃ and holding time is 50 min; The residual gel rate of hemp fiber treated by the best technology of ammonium oxalate-enzyme combining degumming process is 2.34%, which is lower than that of hemp fiber treated by the traditional chemical combining degummin process (12.88%) and that of hemp fiber treated by the chemical-enzyme combining degumming process (8.43%); After being treated by the optimal process of ammonium oxalate-enzyme combining degumming process, the lignin content of hemp fiber decrease from 8.10% (marijuana) to 0.94%, the breaking strength of hemp fiber is 10.31 cN/dtex, and the whiteness of hemp fiber is superior to that of hemp fiber treated by the traditional chemical degumming process and that of hemp fiber treated by the chemical-enzyme combining degumming process.