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抗菌聚丙烯的性能及影响因素 总被引:1,自引:0,他引:1
选用经表面处理的无机抗菌剂和共聚聚丙烯(PP)及助剂熔融共混制备抗菌PP,研究了抗菌剂在PP中的分散性和抗菌PP的抗菌性能、力学性能及加工性能。结果表明:当抗菌剂质量分数为0.5%时,抗菌PP具有强抗菌性,对大肠杆菌和金黄色葡萄球菌的抗菌率均达到99.0%以上;加入质量分数为1.00%的抗菌剂则具有强抗菌持久性.同时抗菌PP保持良好的力学性能和加工性能。 相似文献
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壳聚糖接枝甲基丙烯酸甲酯在抗菌塑料中的应用 总被引:2,自引:1,他引:1
采用水相悬浮聚合法制备了接枝壳聚糖,红外光谱、XRD及扫描电镜分析证明了甲基丙烯酸甲酯单体成功接枝到壳聚糖分子上,机械共混法制备了以LDPE为基体的抗菌塑料,并通过定量抗菌实验对抗菌塑料抗菌活性进行了测定。结果表明:改性壳聚糖与树脂间具有很好的相容性;抗菌剂添加量为3份时,抗菌塑料对大肠杆菌、枯草杆菌在24h.48h抗菌率均超过90%。此外,抗菌剂的加入对材料力学性能无不良影响。 相似文献
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聚丙烯抗菌塑料的制备及性能研究 总被引:11,自引:1,他引:11
将表面处理过的载银无机抗菌剂与聚丙烯(PP)经双螺杆挤出得到高浓度的抗菌母料,然后按一定比例添加到PP中制备了PP抗菌塑料。研究了抗菌母料的毒性、添加量对PP抗菌塑料抗菌性能的影响,抗菌剂在PP抗菌塑料中的分散性,以及PP抗菌塑料的抗菌性能、力学性能和光老化性能。结果表明,抗菌剂在含4%(质量含量,下同)抗菌母料(或1%的抗菌剂)的PP抗菌塑料中分散均匀,基体力学性能不受影响;其对大肠杆菌、金黄色葡萄球菌等的抗菌率都达到99%以上,具有高效、广谱和长效抗菌性能以及良好的光老化性能。 相似文献
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采用水相悬浮聚合法合成壳聚糖接枝苯乙烯(CTS-g-St)抗菌剂,机械共混法制备了以LDPE为基体的抗菌塑料,采用红外光谱分析抗菌剂,扫描电镜观察材料断面,定量抗菌实验对抗菌塑料抗菌活性进行了测定,并测试了材料的力学性能。结果表明:苯乙烯单体成功接枝到壳聚糖分子上;改性壳聚糖与树脂间具有很好的相容性;抗菌剂添加量为2份时,抗菌塑料对大肠杆菌、枯草杆菌在24h、48h抗菌率均超过90%;抗菌剂的加入对材料力学性能无不良影响。 相似文献
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采用高温熔融法,在磷酸盐玻璃的配合料中引入抗菌剂硝酸银,一次熔化制得抗菌玻璃材料。通过对磷酸盐玻璃的抗菌性能和缓释性能分析,结果表明:制备抗菌磷酸盐玻璃,合适的银含量为1.5%~2.0%(质量),处理温度在1200~1350℃,即可获得良好的抗菌效果和缓释性。 相似文献
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纳米复合抗菌丙纶性能研究 总被引:8,自引:3,他引:8
将聚丙烯 ,纳米陶瓷粒子 ,沸石混合造粒制得抗菌母粒 ,聚丙烯切片与抗菌母粒共混熔融纺丝 ,得到纳米复合抗菌丙纶。测试了纤维的抗菌性能、热性能、力学性能 ,并对纳米粒子及纤维进行了扫描电镜分析。结果表明 :纳米抗菌剂最佳含量在 0 .8%左右 ,纤维抑菌率达 90 %以上 ,且耐久性好。纤维结晶度下降 ,而熔点提高。纳米抗菌剂在纤维中有少量凝聚 ,纤维断裂强度略有降低 ,但能够满足加工及服用要求 相似文献
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将抗菌丙纶母粒(含质量分数20%无机载银抗菌粒子)与PP进行熔融共混、切片,再通过熔融纺丝制得抗菌丙纶。扫描电镜观察经表面改性处理的无机抗菌粒子在丙纶中分散较好,大小均匀,且与PP基体具有良好的界面相容性;DSC测试表明:抗菌粒子对PP基体有异相成核作用,使PP结晶度和熔融温度略有提高;加入无机抗菌粒子,降低了丙纶的力学性能,添加量宜1%;通过改变纤维的拉伸倍数,提高抗菌丙纶的力学性能,拉伸倍数为8时,其力学性能最好;该抗菌丙纶对革兰氏阴性和阳性菌的杀菌率都大于99.9%,经水洗后仍有较好的抑菌效果,具有一定的长效抗菌性。 相似文献
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聚丙烯抗菌塑料的研制 总被引:1,自引:0,他引:1
先将自制载银沸石无机抗菌剂表面处理,再与聚丙烯(PP)混合,经双螺杆挤出得到高浓度的抗菌母粒,然后按一定比例添加到PP中制备抗菌塑料。研究了抗菌剂的添加量对PP抗菌母粒抗菌性能的影响,抗菌剂在PP抗菌塑料中的分散性,以及PP抗菌塑料的抗菌性能、力学性能。结果表明,含质量分数1%抗菌剂的抗菌母粒PP在抗菌塑料中分散均匀,基体力学性能不受影响,其对大肠杆菌、金黄色葡萄球菌等的抗菌率都达到96%以上,具有长效抗菌性能以及良好的缓释性能。 相似文献
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优选出有机分子组装型(KJY-1)和无机银系(KJW-1)抗菌剂,与PP切片共混纺丝,在低速、大喷丝 板、一步法设备上生产抗菌丙纶。适当调整纺丝工艺,纺丝性能良好,抗菌丙纶的物理指标与常规丙纶无异。 KJY-1抗菌剂添加0.8%时,纤维抗菌率达99%,经50次洗涤抗菌率仍达90%以上。KJW-1型抗菌剂添加 1%时,纤维抗菌率达93%。 相似文献
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The crystalline morphology and dynamical crystallization of antibacterial polypropylene composite and pure polypropylene were investigated via differential scanning calorimeter (DSC), wide angle X‐ray diffraction (WAXD), and real‐time hot‐stage optical microscopy (OM). The results reveal that the crystalline morphology of antibacterial PP composites changes with variations of the crystallization conditions and compositions. The crystalline phase consists of both α‐PP and β‐PP crystals. The content of β‐PP decreases with the increase in antibacterial agent content and cooling rate. With the addition of β‐nucleating agent, the morphologies of all dynamically crystallized antibacterial PP composites show no obvious spherulitic morphology, and the decrease of crystal perfection and the increase of nucleation density of antibacterial PP composite system could be observed. With the increase of antibacterial agent content, the overall crystallization rates of the antibacterial PP composite increase dramatically, while the content of β‐PP in all antibacterial PP composite decrease distinctly under given cooling conditions. These results can be explained by the interruptive effect of antibacterial agent on interactions of β‐nucleating agent components and the obstructing effect of antibacterial agent on the mobility of PP chains in melts. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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Chak Yin Tang Da‐zhu Chen Kathy Yuen Yee Chan Kit Man Chu Pak Cheung Ng Tai Man Yue 《Polymer International》2011,60(10):1461-1466
The key problems faced in developing indwelling catheters are how to incorporate antibacterial agents into the substrate and how to improve the antibacterial effectiveness. In this study, an antibacterial composite coating layer is inversely in situ formed on the silicone substrate by a novel technique involving deposition of an antibacterial agent, solution casting and crosslinking of a silicone resin. The antibacterial particles were strongly bonded to the matrix silicone and evenly dispersed on the coating surface. Moreover, energy‐dispersive X‐ray analysis revealed the gradient distribution of the antibacterial agent, perpendicular to the composite surface. The co‐instantaneous crosslinking within the coating layer and polymer substrate as well as the graded structure formed lead to good adhesion between the two parts. The silicone composite shows a highly efficient antibacterial activity with no cytotoxicity to HL‐60 cells. Compared with the commonly used methods of incorporating antibacterial agents into the silicone substrate, such as multiple dip‐coating, surface grafting or simple blending, the proposed process is easily operated and is promising for forming a percutaneous or subcutaneous device with the capacity for efficient sterilization in an economical way. Copyright © 2011 Society of Chemical Industry 相似文献