共查询到20条相似文献,搜索用时 109 毫秒
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介绍了吸湿性对纺织材料性能的影响及其产生机理,以及几种纤维吸湿后性能变化的比较,同时分析了纺织材料在加工过程中的性能变化、工艺要求及对织物外观和性能的影响。 相似文献
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The main focus of the present research work was to explore mechanical and tribological properties of Himalayan nettle fiber and unsaturated polyester resin (GP) using hand lay-up method. Four composite laminates were prepared by adding the Himalayan nettle fibers by weight percentage (5%–20%). The various properties (e.g., tensile strength, hardness, impact strength, and abrasion wear) were calculated for the composite laminates. It was found that the significant variation in properties was observed when fiber addition was in the range 15%. The change in the properties was negligible when fiber addition was increased from 15% by weight. 相似文献
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通过对糙皮侧耳菌产漆酶发酵培养条件的优化,得到高效产漆酶的发酵培养条件(1L):麦草粉20g,酒石酸铵5.0g,pH5.0,吐温-800.1%,藜芦醇600μL,摇床转速为128r/min,温度30℃,微量元素液70mL.然后对发酵粗酶液进行初步分离纯化,经过超滤膜(Amincon)超滤浓缩,截留分子量为1.0×104的粗酶液,用初步纯化的漆酶液对荨麻进行生物脱胶,结果表明,漆酶对木质素去除率82%,残胶率降低了62%,比常规的化学脱胶去除木质素提高了20%. 相似文献
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The aim of this study is to explore the effects of different parameters on acoustic properties of activated carbon fiber felts. Seven viscose-based activated carbon fiber felts with different specifications were selected to test the sound absorption coefficients in normal incidence by using transfer-function method and an impedance tube in an acoustic range of 250–6300?Hz frequencies, and to analyze the effects on acoustic properties caused by factors such as: thickness, bulk density, and fiber diameter. The result demonstrated that activated carbon fiber felts exhibited exceptional acoustic properties. As frequency increases, sound absorption coefficients of less-thick felts went upwards in the whole range of frequencies; when the thickness amounted to 9?mm, sound absorption coefficients showed a sharp increase at low frequencies and a fluctuation at high frequencies. With the increase in thickness and bulk density, sound absorption properties improved first and then impaired at the same level of frequency; with a decrease in the fiber diameter, properties enhanced at the same level of frequency. When thickness and bulk density increased and fiber diameter decreased, sound absorption coefficients of the first resonance frequency displayed an upward trend to different degrees, while the first resonance frequencies declined discrepantly. 相似文献
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为有效解决纤维及其制品在生产过程中的摩擦问题,提升产品综合性能,对现阶段纤维及其制品生产及使用过程中因摩擦引起的常见缺陷、摩擦性能研究背景及研究价值进行了介绍。阐述了点接触型、线接触型和面接触型纤维及其制品摩擦性能测试方法,分析了不同研究方法的特点、适用范围及其最新进展,并对纤维摩擦性能部分研究成果进行总结。分析认为:纤维及其制品的摩擦性能研究涉及多学科交叉,需加强纤维及其制品微观接触模型及摩擦性能表征方式、与纺织工艺相匹配的测试方法及测试精度提升等方面研究,同时需要纺织、机械、材料和数学等学科人才团队协同创新来推动纤维及其制品摩擦性能的研究进展。 相似文献
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测试和分析了聚乳酸纤维的主要物理性能、化学性能、燃烧性和溶解性,并同涤纶进行对比,研究结果可为聚乳酸纤维的合理使用和鉴别提供理论参考。 相似文献
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