共查询到19条相似文献,搜索用时 421 毫秒
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海藻酸和甲壳胺纤维的性能比较 总被引:2,自引:1,他引:1
海藻酸和甲壳胺通过湿法纺丝,可以加工成纤维,并可以加工成非织造布、机织物、针织物等材料,应用于医用卫生材料的生产。分析了海藻酸和甲壳胺的化学结构,对其吸附性能、结合重金属离子的能力以及抗菌性能作了比较。 相似文献
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多磺酸基直接染料在甲壳胺纤维上的吸附 总被引:4,自引:0,他引:4
探讨不同温度下甲壳胺纤维对含有6个磺酸基的直接橙39的吸附性能,运用3种吸附理论模型即Langmuir、Freundlich和Redlich-Peterson吸附方程对实验数据进行拟合,对获得的3种理论吸附模型的吸附参数及正规偏差(ND)进行比较。结果表明不同温度下,Freundlich吸附模型偏离实验点的程度较大,而Redlich-Peterson吸附模型最符合甲壳胺纤维对直接橙39的吸附行为,同时伴有吸热现象出现。 相似文献
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简要介绍了甲壳胺的来源、性能及发展,概述了甲壳胺非织造布的加工方法。对医用敷料使用现状和甲壳胺医用敷料市场的分析,说明了甲壳胺纤维用于医用敷料有非常好的前景,并对甲壳胺非织造布的深加工及其相关产品的开发提出了建议。“ 相似文献
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甲壳胺非织造布及其在医用敷料方面的应用前景 总被引:6,自引:1,他引:5
简要介绍了甲壳胺的来源、性能及发展 ,概述了甲壳胺非织造布的加工方法。对医用敷料使用现状和甲壳胺医用敷料市场的分析 ,说明了甲壳胺纤维用于医用敷料有非常好的前景 ,并对甲壳胺非织造布的深加工及其相关产品的开发提出了建议 相似文献
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新型合纤原料对非织造布行业的推动 总被引:1,自引:0,他引:1
非织造布的研究开发与纤维原料的使用密不可分。文章分别就用于非织造产品开发的新型化纤原料、复合纤维、甲壳素与甲壳胺纤维、环保型纤维、新型聚酯PTT纤维的特性与应用作了介绍。强调纤维原料的开发应用对推动非织造布的产品开拓具有重要意义。 相似文献
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以金黄色葡萄球菌为实验菌种,从实验角度证实甲壳胺纤维的抗菌为接触性抑菌;并利用烧瓶振荡法,探讨了试验条件如pH值、温度对甲壳胺纤维抑菌率的影响。研究表明,甲壳胺纤维对金黄色葡萄球菌的抑菌率随pH值的下降而增强,而温度对其抗菌性影响则不明显。 相似文献
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为研究稻秸秆纤维对Cu2+的吸附性能,测试了Cu2+初始质量浓度、处理时间、处理温度、固液比和pH值等因素对稻秸秆纤维吸附效果的影响,并对吸附前后的稻秸秆红外光谱进行了分析比较。实验结果表明:稻秸秆纤维对铜离子的吸附以物理吸附为主,也存在少量化学吸附;稻秸秆纤维对Cu2+具有快速、良好的吸附性能,尤其对低质量浓度的Cu2+溶液吸附效果较好;溶液的初始pH值对稻秸秆纤维吸附作用影响较大,环境温度对稻秸秆纤维吸附作用影响较小;当固液比值为7.5mg/L、溶液初始pH值为5时,稻秸秆对Cu2+的吸附性能达到最佳。 相似文献
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为研究废旧羊毛纤维非织造材料的吸声性能,利用非织造材料的生产工艺,以废旧羊毛纤维为主要原料,制备一种新型羊毛非织造材料。通过使用传递函数法和驻波管法,对羊毛非织造材料的吸声性能进行了测试,分析了声波频率为250-6300 Hz范围内,材料的厚度、密度和空腔深度对其吸声性能的影响。结果表明,羊毛非织造材料吸声性能优异,对高频的吸声性能优于低频;在中低声波频率,随材料厚度、密度和空腔深度的增加,其吸声性能越好。材料厚度和空腔深度是影响羊毛非织造材料吸声性能的主要因素;通过增加空腔深度提升材料的吸声性能,是较为经济合理的办法。 相似文献
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为提高医卫用非织造布产品的使用性能,本文采用NaOH/H2O2一步法对棉纤维进行脱脂漂白,通过正交试验设计,利用极差分析法,确定最佳脱漂工艺,探讨先漂后刺和先刺后漂两种工艺对医卫用全棉水刺非织造材料吸水性、白度、强度、柔软性和透气性的影响。结果表明:最佳脱漂工艺参数组合为:时间60 min,浴比1:30,温度95 ℃;温度对纤维白度和吸水量的影响最大,时间对纤维强度的影响最大;使用最佳脱漂工艺参数得到的全棉水刺非织造布,其厚度、克重和断裂强度有所下降,吸水性明显上升;采用最佳脱漂工艺参数组合制备的先漂后刺全棉水刺非织造布的断裂强度和断裂伸长率较高,而采用先刺后漂全棉水刺非织造布的柔软性、透气性和吸水性更好。 相似文献
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为提高丝瓜络纤维资源的利用价值,采用气爆法、复合酶法、化学法对丝瓜络纤维进行处理,研究处理方法对纤维性能的影响。借助扫描电子显微镜、热重分析仪等对处理前后丝瓜络纤维的表面形态、脱胶率、化学成分、热学性能及吸湿性能进行分析,并根据纤维的吸放湿性能绘制吸放湿曲线。结果表明:预处理后丝瓜络纤维表面均出现条痕,化学处理的效果最明显;气爆处理纤维的脱胶率最低为20. 00%,纤维素含量为54. 61%,化学处理后纤维素含量高达81. 10%,酶处理效果介于二者之间,3 种处理方法对木质素的去除率均较低:丝瓜络纤维的回潮率随着脱胶率的提高而增加,3 种方法处理丝瓜络纤维后的吸放湿曲线规律基本一致;预处理有助于丝瓜络纤维热稳定性的提高,且脱胶率越高,热分解温度也越高。 相似文献
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本实验以香菇脚为原料,采用湿打浆、漂白和酶处理三种不同处理方法制备食用菌纤维,并评价其纤维性能和凝胶理化特性。再将处理后的纤维加入蛋清粉溶液制成凝胶,分析其理化性能,研究不同处理方法的纤维添加量(0、0.5、1.0、2.0、5.0 wt%)对蛋清凝胶性能的影响。结果表明,处理后的样品不溶性膳食纤维比例均在一定程度上增加,其中酶处理后不溶性纤维含量最高,达到83.41%±0.15%;处理后的纤维吸水性为7.45~9.71 g/g,吸油性为0.98~1.84 g/g,膨胀力为7.12~8.90 mL/g。香菇纤维-蛋清复合凝胶的pH在7.98±0.04~6.62±0.12范围内变化;当纤维添加量≤2%时,凝胶的蒸煮损失率随纤维添加量的增加而降低;漂白制得的纤维对凝胶色度的影响最小;与对照组相比,香菇纤维能够明显改善凝胶的质构特性,且复合凝胶具有较好的咀嚼度和硬度。综上,香菇脚制得的纤维与蛋清蛋白能组成性能更优的复合凝胶,可用于仿造肉食品的开发。 相似文献
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Hollow chitosan fibers were reacted with chloropalladate solutions and subsequently reduced by hydrogen produced in situ by reaction of sulfuric acid with zinc powder in order to manufacture palladium supported on catalytic hollow chitosan fibers (C2HF-Pd). This catalytic support was used to degrade 3-nitrophenol (3-NP) using two different hydrogen donors (hydrogen gas and sodium formate). The solution was flowed through the lumen of the fiber, while the sodium formate was recirculated round the outside of the fiber. In the case of hydrogen gas, the gas was maintained under controlled pressure outside the fiber. The influence of the pH, residence time (ca. flow velocity), nitrophenol concentration, and hydrogen-donor concentration (or pressure) was investigated for both systems in order to evaluate the limiting parameters. While the system using sodium formate was the most efficient for nitrophenol conversion, the system using hydrogen gas avoided the production of secondary waste solutions (formate solutions with traces of nitrophenol, which pass through the fiber membrane). 相似文献
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The mechanical properties of chitosan–soy globulin capsules depend strongly on the pH values of chitosan and soy globulin solutions in the polyelectrolyte complex formation. When a solution of chitosan was dropped into a solution of soy globulin, a thin chitosan-globulin membrane was formed on the surface of the capsules. These capsules were mechanically weaker than the capsules made by complex formation between sodium alginate and chitosan. In this study 5.0 wt% globulin solution and 2.0 wt% chitosan solution were used. The diameter of the capsules obtained was approximately 3 mm. By immersing the capsules into alkaline solution the composite capsule, having a gel core of chitosan, was obtained. Mechanical properties of the capsule were estimated from compressive force–deformation curves derived from large deformation experiments. The mechanical strength of the capsule was found to depend on the pH values of the chitosan and globulin solutions. The capsules prepared from the chitosan solution with pH 5 and the globulin solution with pH 8 showed high mechanical strength. Moreover, reaction time for capsule formation had an effect on the strength of the capsule. 相似文献
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Recycled wool-based nonwoven material as an oil sorbent 总被引:3,自引:0,他引:3
Radetić MM Jocić DM Iovantić PM Petrović ZL Thomas HF 《Environmental science & technology》2003,37(5):1008-1012
The aim of this study was to highlight the possibility of using recycled wool-based nonwoven material as a sorbent in an oil spill cleanup. This material sorbed higher amounts of base oil SN 150 than diesel or crude oil from the surface of a demineralized or artificial seawater bath. Superficial modification of material with the biopolymer chitosan and low-temperature air plasma led to a slight decrease of sorption capacity. Loose fibers of the same origin as nonwoven material have significantly higher sorption capacities than investigated nonwoven material. White light scanning interferometry analysis of the fibers suggested that roughness of the wool fiber surface has an important role in oil sorption. The laboratory experiments demonstrated that this material is reusable. Recycled wool-based nonwoven material showed good sorption properties and adequate reusability, indicating that a material based on natural fibers could be a viable alternative to commercially available synthetic materials that have poor biodegradability. 相似文献