耐盐性海藻酸钙纤维的制备及性能研究

Study on the Preparation and Properties of Salt-tolerant Alginate Fiber

针对海藻酸钙在盐溶液中易溶问题,利用戊二醛交联反应制备了耐盐海藻酸钙纤维,红外光谱及溶胀度的测试证明发生了缩合交联反应;讨论了不同工艺条件下,改性纤维的溶胀度和力学性能。结果表明,最佳合成条件为温度30℃、交联剂含量8%、反应时间3.0h、pH=5;改性海藻酸钙纤维的溶胀度只有98%,为纯海藻酸钙纤维的27%,改性纤维断裂强度为2.23cN/dtex。

To prevent the dissolution of calcium alginate, utilizing the crosslinking reaction of glutaraldehyde to prepare salt-tolerant calcium alginate fiber were introduced. FTIR and the swelling test domonstrated that a condensation reaction has taken place. The swelling capacity and the breaking strength of modified calcium alginate fiber under different process conditions were discussed. The results show that the optimum synthesis condition is： reaction temperature 30℃, glutaraldehyde at 8%, reaction time 3. Oh and pH 5.0. The swelling capacity of modified calcium alginate fiber is 98%, 27% of unmodified fiber. The breaking strength of the modified fiber is 2. 23 cN/dtex, which is analogous to cotton fibers, and much higher than wool fibers.