[目的]为防沙治沙提供技术支持。[方法]利用天然竹纤维为原料,先通过羧甲基改性制备羧甲基纤维素(CMC),并进一步制备竹纤维基液体地膜,考察CMC用量对膜性能的影响。[结果]随着CMC用量的增加,地膜溶液的粘度逐渐增大,膜的拉伸强度、断裂...[目的]为防沙治沙提供技术支持。[方法]利用天然竹纤维为原料,先通过羧甲基改性制备羧甲基纤维素(CMC),并进一步制备竹纤维基液体地膜,考察CMC用量对膜性能的影响。[结果]随着CMC用量的增加,地膜溶液的粘度逐渐增大,膜的拉伸强度、断裂伸长率和透光率呈先增加后降低趋势,而吸水率则先减小后增加。当CMC用量为5 g/100 ml H2O时,膜的拉伸强度、断裂伸长率和透光率最大,而吸水率最小。30 d后,沙粒表面的竹纤维基液体地膜大量降解,而沙粒硬化成块。红外分析结果表明,CMC与玉米淀粉(ST)或PVA大分子之间发生了交联作用,形成了互穿网络结构。[结论]该研究成功研制了竹纤维基液体地膜,该地膜具有良好的降解和防沙治沙效果。展开更多
Ultrastructural changes in secondary wall formation of Phyllostachys pubescens Mazel fiber were investigated with transmission electron microscopy. Fiber developed initially with the elongation of cells containing...Ultrastructural changes in secondary wall formation of Phyllostachys pubescens Mazel fiber were investigated with transmission electron microscopy. Fiber developed initially with the elongation of cells containing ribosomes, mitochondria and Golgi bodies in the dense cytoplasm. During the wall thickening, the number of rough endoplasmic reticulum and Golgi bodies increased apparently. There were two kinds of Golgi vesicles, together with the ones from endoplasmic reticulum formed transport vesicles. Many microtubules were arranged parallel to the long axis of the cell adjacent to the plasmalemma. Along with the further development of fiber, polylamellate structure of the secondary wall appeared, with concurrent agglutination of chromatin in the nucleus, swelling and disintegration of organelles, while cortical microtubules were still arranged neatly against the inner side of plasmalemma. Lomasomes could be observed between the wall and plasmalemma. The results indicated that the organelles, such as Golgi bodies together with small vesicles, rough endoplasmic reticulum and lomasomes, played the key role in the thickening and lignification of the secondary wall of bamboo fiber, though cortical microtubules were correlative with the process as well.展开更多
文摘[目的]为防沙治沙提供技术支持。[方法]利用天然竹纤维为原料,先通过羧甲基改性制备羧甲基纤维素(CMC),并进一步制备竹纤维基液体地膜,考察CMC用量对膜性能的影响。[结果]随着CMC用量的增加,地膜溶液的粘度逐渐增大,膜的拉伸强度、断裂伸长率和透光率呈先增加后降低趋势,而吸水率则先减小后增加。当CMC用量为5 g/100 ml H2O时,膜的拉伸强度、断裂伸长率和透光率最大,而吸水率最小。30 d后,沙粒表面的竹纤维基液体地膜大量降解,而沙粒硬化成块。红外分析结果表明,CMC与玉米淀粉(ST)或PVA大分子之间发生了交联作用,形成了互穿网络结构。[结论]该研究成功研制了竹纤维基液体地膜,该地膜具有良好的降解和防沙治沙效果。
文摘Ultrastructural changes in secondary wall formation of Phyllostachys pubescens Mazel fiber were investigated with transmission electron microscopy. Fiber developed initially with the elongation of cells containing ribosomes, mitochondria and Golgi bodies in the dense cytoplasm. During the wall thickening, the number of rough endoplasmic reticulum and Golgi bodies increased apparently. There were two kinds of Golgi vesicles, together with the ones from endoplasmic reticulum formed transport vesicles. Many microtubules were arranged parallel to the long axis of the cell adjacent to the plasmalemma. Along with the further development of fiber, polylamellate structure of the secondary wall appeared, with concurrent agglutination of chromatin in the nucleus, swelling and disintegration of organelles, while cortical microtubules were still arranged neatly against the inner side of plasmalemma. Lomasomes could be observed between the wall and plasmalemma. The results indicated that the organelles, such as Golgi bodies together with small vesicles, rough endoplasmic reticulum and lomasomes, played the key role in the thickening and lignification of the secondary wall of bamboo fiber, though cortical microtubules were correlative with the process as well.
