高碘酸钠选择性氧化对亚麻短纤维性能的影响
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摘要
采用氧化剂高碘酸钠对亚麻短纤维进行选择性氧化,分析了高碘酸钠用量、反应时间和反应温度对分裂度及断裂强度的影响。结果表明:高碘酸钠用量6 g/L、45～50℃反应50～60 min时,亚麻短纤维分裂度和断裂强度符合纺纱技术要求。X射线衍射分析表明,氧化处理后的亚麻短纤维纤维素结构在本质上并没有发生变化,衍射峰强度要比未氧化的亚麻短纤维低一些,结晶区部分受到破坏。
The selective oxidation of flax short fibers was carried out by oxidant sodium periodate. The effects of sodium periodate concentration, reaction time and reaction temperature on the splitting degree and breaking strength of flax short fibers were analyzed. The results showed that the splitting degree and breaking strength of flax short fibers could meet the requirements of spinning technology when the dosage of sodium periodate was 6 g/L, the reaction time was 50～60 min and the reaction temperature was 45～50 ℃. X-ray diffraction analysis showed that the cellulose structure of the flax short fiber after oxidation treatment did not change in nature, but the diffraction peak intensity was lower than that of the unoxidized flax short fiber, and the crystallization area was damaged partially.
The selective oxidation of flax short fibers was carried out by oxidant sodium periodate. The effects of sodium periodate concentration, reaction time and reaction temperature on the splitting degree and breaking strength of flax short fibers were analyzed. The results showed that the splitting degree and breaking strength of flax short fibers could meet the requirements of spinning technology when the dosage of sodium periodate was 6 g/L, the reaction time was 50～60 min and the reaction temperature was 45～50 ℃. X-ray diffraction analysis showed that the cellulose structure of the flax short fiber after oxidation treatment did not change in nature, but the diffraction peak intensity was lower than that of the unoxidized flax short fiber, and the crystallization area was damaged partially.
引文
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[3]郑培培,王浩,张燕,等.高碘酸钠处理对苎麻纤维结构和性能的影响[J].苏州大学学报:工科版,2007,27(4):24-27.
[4] de NOOY A E J,PAGLIRO M,BEKKUM H V,et al.Autocatalytic oxidation of primary hydroxyl functions in glucans with nitrogen oxides[J].Carbohydrate Research,1997,304:117-125.
[5]李琳,赵帅,胡红旗.纤维素氧化体系的研究进展[J].纤维素科学与技术,2009,17(3):59-64.
[6]熊犍,叶君,何小维,等.改性非均相高碘酸氧化纤维素反应[J].高分子材料科学与工程,2000,16(3):172-175.
[7]叶君,熊犍,梁立芷,等.邻苯二亚胺纤维素水溶液的荧光行为[J].应用化学,1998,15(5):50-52.
[8] TIZIANI S,SUSSICH F,CESARO A.The kinetics of periodate oxidation of carbohydrates 2.polymeric substrates[J].Carbohydrate Research,2003,338:1 083-1 095.
[9]蔡玉兰,王东伟.天然竹纤维的固态核磁共振谱表征[J].纤维素科学与技术,2009,17(1):1-6.
[2] VICINI S,PRINCI E,LUCIANO G,et al.Thermal analysis and characterization of cellulose oxidized with sodium methaperiodate[J].Thermochimica Acta,2004,418:123-130.
[3]郑培培,王浩,张燕,等.高碘酸钠处理对苎麻纤维结构和性能的影响[J].苏州大学学报:工科版,2007,27(4):24-27.
[4] de NOOY A E J,PAGLIRO M,BEKKUM H V,et al.Autocatalytic oxidation of primary hydroxyl functions in glucans with nitrogen oxides[J].Carbohydrate Research,1997,304:117-125.
[5]李琳,赵帅,胡红旗.纤维素氧化体系的研究进展[J].纤维素科学与技术,2009,17(3):59-64.
[6]熊犍,叶君,何小维,等.改性非均相高碘酸氧化纤维素反应[J].高分子材料科学与工程,2000,16(3):172-175.
[7]叶君,熊犍,梁立芷,等.邻苯二亚胺纤维素水溶液的荧光行为[J].应用化学,1998,15(5):50-52.
[8] TIZIANI S,SUSSICH F,CESARO A.The kinetics of periodate oxidation of carbohydrates 2.polymeric substrates[J].Carbohydrate Research,2003,338:1 083-1 095.
[9]蔡玉兰,王东伟.天然竹纤维的固态核磁共振谱表征[J].纤维素科学与技术,2009,17(1):1-6.