酸性溶液预浸对酶法亚麻脱胶及纤维性能的影响

Influence of acid presoak on enzyme flax retting and properties of fibers

为克服亚麻脱胶过程中酶液向麻茎渗透的屏障,并且节约酶的用量和缩短脱胶时间,采用弱酸对亚麻原茎进行预处理,再经酶法脱胶,以蒸馏水处理为对照,考察了CH_3COOH、NaH_2PO_4/H_3PO_4、H_2SO_4和H_3PO_4溶液预浸处理对亚麻原茎质量损失率及纤维分离程度的影响。以还原糖和总糖含量、纤维分离程度为指标,研究酸溶液种类和浓度对酶法亚麻脱胶的影响,并考察了H_2SO_4和H_3PO_4溶液处理后脱胶麻纤维的力学性能。结果表明,20 mmol/L的H_2SO_4或H_3PO_4溶液处理的亚麻原茎再经酶法脱胶其释放的还原糖和总糖均较高,纤维断裂强力可达150 cN以上,过高和过低浓度的酸溶液对脱胶都没有促进作用。

Flax stem was presoaked by dilute acid and then treated with enzyme to lift permeated barrier between enzyme and substrate in flax fiber. This environmentally favorable and economical method was investigated to facilitate the flax enzyme retting. Weight loss ratio and fiber separation degree of flax stems treated by CH3COOH,NaH2PO4/ H3PO4,H2SO4 and H3PO4 were researched. Taking reducing sugar and total sugar contents,fiber separation degree and mechanical property as indexes,the influence of acid treatment on flax enzyme retting was investigated. The flax stems that treated by 20 mmol / L H2SO4 and H3PO4 and subsequently retted by enzyme released more reducing sugar and total sugar,and breaking strength of retted fibers could reached more than 150 cN. Only the optimal concentration could accelerate enzyme retting.