漂白针叶木纤维氰乙基化改性的研究

Modification of Bleached Coniferous Wood Fiber by Cyanoethylation

以KSCN饱和的NaOH溶液作预润胀剂和催化剂,以丙烯腈作醚化剂对漂白针叶木纤维进行氰乙基化改性.研究了氰乙基化改性过程中的相关工艺参数对纤维改性及其热塑性的影响.并利用FT-IR、SEM对氰乙基化改性产物的化学结构和微观形貌进行了表征.结果表明,打浆度为45°SR的1.0 g漂白针叶木纤维,经KSCN饱和的1.00 mol.L-1NaOH溶液预处理120 min,丙烯腈用量为6.85 g时,在40～50℃下静置反应120 min,可获得接枝率为67.0%～72.8%的氰乙基化改性产物.

The bleached coniferous wood fiber was modified by cyanoethylation using NaOH solution saturated by KSCN as pre-swelling agent and catalyst, and acrylonitrile as etherification a- gent. The effects of the relevant process parameters of cyanoethylation modification reaction on fiber modification and its thermoplasticity were studied. Fr-IR and SEM were used to characterize the chemical structure and surface morphology of cyanoethylated fibers. It was found that the bleached coniferous wood fiber with 45 ~ SR beating degree, pretreated by 1.00 mol · L^-1 NaOH solution satu- rated by KSCN for 120 min, reacted with 6. 85 g acrylonitrile at 40 -50 ℃ for 120 min, the cyanoethylated fiber with the graft of 67.0% - 72. 8% could be obtained.