共查询到19条相似文献,搜索用时 203 毫秒
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为提高聚丙烯纤维的生物相容性,实现漆酶在纤维上的固定化,以二苯甲酮(BP)为光引发剂,甲基丙烯酸甲酯(MMA)为接枝单体,采用紫外光辐射对聚丙烯纤维进行表面改性。通过对比改性前后聚丙烯纤维的红外光谱,证实MMA可通过紫外光引发接枝到聚丙烯纤维上。考察了接枝反应中光引发剂用量、反应单体体积分数和紫外辐照时间对接枝率的影响,得到聚丙烯纤维改性的较优工艺条件:BP浓度为0.3mol/L,MMA体积分数40%,紫外辐照时间为60 min。改性纤维固定化的漆酶具备一定的脱色作用和操作稳定性,在证明接枝反应发生的同时,也通过漆酶的固定化实现了对聚丙烯纤维生物相容性的改善。 相似文献
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紫外辐照在UHMWPE纤维材料改性中的应用 总被引:1,自引:0,他引:1
本文对UHMWPE纤维的表面改性方法进行了概述 ,重点介绍了紫外辐照交联和紫外光接枝改性的优点、机理和工艺 ,并提出了目前紫外辐照改性中尚存的问题。 相似文献
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微波辐照下丝绸接枝丙三醇缩水甘油醚 总被引:2,自引:0,他引:2
探讨微波辐照下丝绸接技两三醇缩水甘油醚的辐照条件和接枝效果。同温下微波引发时接枝率比热引发高7.1%,NaCl为引发剂时微波辐照下接技率比常规接枝率高12.7%。微波引发接技时的反应位点与常规接技基本相同;微波引发接技不破坏胱氨酸,有利于保护纤维弹性、提高丝绸的折皱回复率。 相似文献
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This paper describes the preparation of modified polypropylene (PP) fibers. The modified PP composite was prepared by compounding PP in the presence of polyvinyl alcohol (PVA), PP grafted with maleic anhydrate (PPMAH), and montmorillonite (MMT). The resultant PP/PVA/PPMAH/MMT nanocomposite was easily spinnable and the obtained fibers were able to undergo orientation, using the drawing process at which the PP matrix is oriented in the direction of the fiber axis. The thermal properties, degradation, and dyeability of the fibers were studied. The presence of PVA in the fibers supports both the formation of β-modification of PP crystallinity and facilitates the dyeability of the modified PP fibers. 相似文献
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通过对聚丙烯纤维进行包覆处理,增加其表面的亲水性,并提高其密度;采用在植物纤维中配抄聚丙烯纤维作手抄纸性能对比实验;从宏观现象和实验分析得出:改性后的聚丙烯纤维分散性得到了提高。 相似文献
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Daniella R. Mulinari Joyce de Paula Cipriano Maria Rosa Capri Amanda Torres Brandão 《Journal of Natural Fibers》2018,15(2):174-182
Sugarcane bagasse fibers were pre-treated with sulfuric acid solution to improve the mechanical properties of polypropylene (PP) composites for automotive parts. It was used maleic anhydride grafted polypropylene (PP-g-MA) as coupling agent. Fibers were characterized by the techniques of scanning electron microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopy. The chemical composition of fibers was also evaluated. PP was mixed to fibers, in proportions of 5 to 10% (wt/wt) using a thermokinetic mixer model MH-50H. Furthermore tensile specimens were prepared for evaluation of mechanical properties by tensile test. Pre-treatment fibers permitted the removal of other components from sugarcane bagasse. The chemical treatment reduced some of the fibers amorphous components, causing changes in their surface.
The addition of pre-treated and compatibilizedfibers to PP matrix caused an increase in the elastic modulus in tensile. It was possible to obtain a more rigid and less deformable material with up to 10% fiber content. However, the use of the coupling agent showed results superior to other composites. 相似文献
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以硬脂酸铁(FeSt3)为光敏剂,将其加入聚丙烯(PP)切片中,经熔融共混纺丝制得PP/FeSt3共混纤维。通过人工加速紫外光降解试验,分析了含光敏剂的PP共混纤维力学性能以及光老化失重的变化情况,并与纯聚丙烯纤维进行对比。结果表明:FeSt3对PP共混纤维的光降解具有明显的催化作用。试验条件下,当共混纤维中添加0.2%~0.6%(质量)FeSt3时,其力学性能明显下降,老化诱导期显著提前,并且FeSt3含量越高,其催化作用就越强。通过控制FeSt3的添加量,可在一定程度上控制PP纤维的光降解行为。 相似文献
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采用正交多项式回归设计的方法,探讨了次氯酸钠有效氯浓度、氯化pH值及氯化时间对保健丙纶织物染色性能的影响,获得氯化的最佳工艺条件,并研究了氯化丙纶织物的染色工艺条件。 相似文献
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可染丙纶天然彩棉交织物的生产实践 总被引:1,自引:1,他引:0
探讨可染丙纶纯纺色纱与天然棕棉纯纺纱交织服用织物的开发及生产过程.通过对可染丙纶纱进行筒子染色,优选染料配方;织前准备优选浆料配方,提高浆纱质量;织造工序合理确定经位置线和引纬工艺,最终生产出的织物兼具两种纤维的优良特性,织机效率达到91%以上,坯布下机一等品率达到83%以上. 相似文献