温度对棉纤维强度及超分子结构的影响

Effect of Temperature on Cotton Fiber Strength and Super molecular Structure

利用短季棉中棉所 16号品种 ,研究了温度对棉纤维断裂比强度与超分子结构的影响 ,结果表明 :纤维断裂比强度随铃龄增大而升高 ;相同铃龄随温度下降断裂比强度降低。较高温度条件下 α角随铃龄增大不断宽化 (变大 ) ,对纤维强度提高不利 ;较低温度条件下 α角随纤维发育不断变小 (优化 ) ,某种程度上有利于纤维强度提高 ;角和 ψ角随纤维发育不断优化 (变小 )也有利于纤维强度提高 ;随温度下降不同处理同一部位相同铃龄 角与 ψ角值有变大趋势。随温度下降同一部位相同铃龄晶粒尺寸值降低 。

Effects of temperature on cotton fiber strength and super molecular structure w ere studied by using short period cotton( Gosspium hisutum L.)cultivar “CCR I 16”in this paper, the results are as follows. With fiber development the gaug e tenacity increases but reduces at the same boll period with temperature droppi ng. Angle α widens continually under higher temperature condition which is unfa vorable to fiber strength. When temperature drops angle α converts to be smalle r, which has positive effect on fiber strength is some degree with fiber develop ment and so do angle φ and ψ. Angle φ and ψ tend to rising with temperat ure dropping at the same boll period. Crystalline grain size increases with fibe r development, but tends to decrease with temperature dropping at the same boll period which results to the decrease of fiber strength.