纤维素纤维的生物降解性能

为了解纤维素纤维的生物降解性能，选取棉、黏胶、竹浆、Modal、Lyocell五种纤维素纤维，填埋于自然环境的土壤中，通过对其降解前后的颜色、表观形态、质量、力学性能、结晶度、组分变化的综合评价来表征其生物降解性，并对影响降解性的因素进行了探讨。经过90天的填埋，五种纤维均发生了降解，但棉纤维的降解速率明显高于其他再生纤维素纤维，降解速率的排序为：棉>黏胶>竹浆>Modal>Lyocell。分析表明纤维的表观形态和内部结晶结构对纤维素纤维降解速率有重要影响，并且天然纤维素纤维的生物降解性优于可再生纤维素纤维，这是由于再生纤维素纤维加工过程中其他物质的进入、残留降低了其降解性。

Biodegradability of cellulose fibers

The biodegradability of cellulose fibers ,cotton, viscose, bamboo(viscose), Modal and Lyocell, was charactered by the changes of color,morphology, weight,mechanical properties,crystallinity, and chemical properties after buried in nature soil for a period of time. And the influences on biodegradability were discussed.After 90 days, the experimental results indicated that all five cellulose fibers experienced a rapid degradation.However,cotton, as the nature cellulose fiber, presented the fastest degradation rate .The sort of degradation rate was cotton>viscose>bamboo(viscose)>Modal>Lyocell.Analyses show the morphology and internal crystal structure has a significant influence on the biodegradability, and biodegradability of natural cellulose fiber is better than regenerated cellulose fiber, the substances residues in the regenerated?cellulose?fibers during the manufacturing processes decrease their biodegradability.