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《人造纤维》2019,(5)
采用湿法纺丝技术将生物质石墨烯浆料与海藻酸钠溶液进行共混纺丝,制备生物质石墨烯改性海藻纤维,并对其力学性能、吸湿性能、阻燃性能、抗菌性能、远红外性能进行测试。结果表明,随着生物质石墨烯含量的增加,纤维力学强度先增高后下降,当生物质石墨烯加入量为0.5%时,纤维强度可达1.72cN/dtex。纤维回潮率和极限氧指数(LOI)随生物质石墨烯含量提高而增大,当生物质石墨烯加入量为1.5%时,回潮率为23.36%,极限氧指数为41。少量添加生物质石墨烯,纤维呈现较好的抗菌和远红外性能,且随着生物质石墨烯含量的增加,纤维抗菌和远红外性能不断提高,当生物质石墨烯加入量为1.5%时,纤维对金黄色葡萄球菌、大肠杆菌及白色念珠菌的抑菌率均大于99%,远红外温升为3.3℃,远红外发射率0.9%。 相似文献
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采用改性剂对氧化石墨烯进行改性,通过激光粒度仪、扫描电镜、远红外光谱仪等测量分析了改性氧化石墨烯的粒径等参数,评估氧化石墨烯的改性效果。将其与锦纶6结合,制备了改性氧化石墨烯/锦纶6,并表征了该纤维的力学性能、抗菌性以及表观状态等。试验表明,制备的改性氧化石墨烯粒径小,改性氧化石墨烯/锦纶6的抗菌效果优异,力学性能满足市场标准要求。 相似文献
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采用圣泉集团生产的生物质石墨烯聚酯母粒为原料,通过与负离子聚酯母粒进行共混熔融纺丝,制备了石墨烯负离子改性聚酯纤维,并对其力学性能、抑菌性能、远红外性能及负离子释放量进行测试。结果表明:石墨烯负离子改性聚酯纤维的断裂强度为3.5 cN/dtex,断裂伸长率为19.9%,沸水收缩率为8.7%,能够满足织造要求;对金黄色葡萄球菌、白念珠菌的抑菌率为98%,对大肠埃希菌的抑菌率为96%,抑菌效果显著;远红外辐射温升为2.0℃,远红外发射率为0.89,远红外功能优异;负离子释放量达到了6 010个/cm~3,具有明显的负离子保健功能且效果稳定持久。 相似文献
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针对聚丙烯(PP)纤维拉伸强度不够高和刚性差的缺点,采用高密度聚乙烯(PE-HD)及石墨烯通过熔融法制备PP/PE-HD/石墨烯纤维;通过偏光显微镜、拉伸强度、扫描电子显微镜、差式扫描量热仪、傅里叶红外光谱仪等测试研究了石墨烯加入对PP/PE-HD纤维性能的影响。结果表明,当加入25份(质量份数,下同)PE-HD,改性纤维的拉伸强度达2.46 GPa,与PP纤维的拉伸强度相比提升了8 %;当继续加入0.3份石墨烯时, PP/PE-HD/石墨烯纤维的拉伸强度比PP/PE-HD纤维提高了1.6 %;加入PE-HD和石墨烯改性后,PP纤维的热稳定性改善。 相似文献
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利用静电纺丝技术制备聚己内酯(PCL)/纳米氧化锌(ZnO)超细纤维,通过扫描电子显微镜、差示扫描量热仪研究了静电纺丝电压和ZnO用量对复合纤维的直径、热性能和结晶性能的影响,并通过抗菌实验研究了PCL/ZnO复合纤维膜的抗菌性能。结果表明,随着纺丝电压的升高,PCL的直径先减小后增加,熔点(Tm)和片晶厚度(Lc)呈现先增加后减小的趋势;随着ZnO用量的增加,PCL/ZnO复合纤维的直径在不同电压下均逐渐增加,Tm和结晶度(Xc)也逐渐增加;当ZnO的含量为2.0 %时抗菌性能最强,并在放置60 d后抗菌性能依旧没有明显下降。 相似文献
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Wang Shuhua Hou Wensheng Wei Liqiao Dai Jinming Jia Husheng Liu Xuguang Xu Bingshe 《应用聚合物科学杂志》2009,112(4):1927-1932
Poly(ethylene terephthalate) (PET) had been compounded with antibacterial materials for preparing antibacterial masterbatch using a twin‐screw extruder. Composite antibacterial PET fibers were prepared using the antibacterial masterbatch and pure PET resin by high‐speed melt‐spinning device, with spinning rate 3500 m/min. The antibacterial PET fibers of 5 wt % antibacterial materials were very effective against tested germs, with antibacterial ratios more than 90%, and had well mechanical properties. Scanning electron microscopy micrograph shows that antibacterial materials have been well dispersed in PET matrix. Microstructure of composite antibacterial fibers was studied by X‐ray diffraction, and the nucleating effect of antibacterial materials in the cooling crystallization process of PET was confirmed by differential scanning calorimetry (DSC). Result of thermogravimetry (TG) result shows that the addition of antibacterial materials accelerated the degradation of PET. The aged properties of antibacterial fibers were evaluated. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
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High strength polyimide fibers with functionalized graphene 总被引:1,自引:0,他引:1
Graphene possesses unprecedented physical and chemical properties and has been thought to be ideal filler for reinforcing fibers' mechanical properties. However, graphene is difficultly dispersed in polymer which severely restrict to prepare high-strength and high-modulus composites. In this work, we report an effective method to fabricate a kind of organ-soluble polyimide (PI)/graphene composite fiber using in situ polymerization. Graphene oxide (GO) is modified by 4,4′-diaminodiphenyl ether (ODA) to obtain the GO-ODA nanosheets which exhibit excellent dispersibility and compatibility with the organ-soluble PI matrix. WAXD results show that these 2D nanosheets have a significant influence on the crystallization, aggregation or assembly behaviors of the polymer chains. The PI/graphene composite fiber containing 0.8 wt% of GO-ODA presents a tensile strength of 2.5 GPa (1.6 times higher than the pure PI fiber), and tensile modulus of 126 GPa (223% raises compared with pure PI fiber). Furthermore, the incorporation of graphene significantly improves the glass transition temperature and thermal stability of the composite fibers. Thanks to the excellent hydrophobic properties of graphene, the hydrophobic behavior of the composite fibers is greatly improved. This effective approach shows a potential application in fabricating multifunctional polymer-based composite fibers. 相似文献
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以含偕胺肟基团的螯合纤维(AOCF)为原料,使其与纳米硫化镍反应,制得纳米硫化镍/偕胺肟复合纤维(nano-NiS_2/AOCF)。运用扫描电镜(SEM)及X-衍射能谱仪(EDX)对样品进行了相应的表征,并研究纤维对大肠杆菌和枯草芽孢杆菌的抗菌性能。结果表明,在纤维表面生成了分散均匀的纳米硫化镍,0.18g的nano-NiS_2/AOCF对大肠杆菌的抗菌能力与0.8万单位的青霉素相当,而0.10g的nano-NiS_2/AOCF对枯草芽孢杆菌的抗菌能力与0.5万单位的青霉素相当。 相似文献
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Flexible strain sensors have attracted tremendous interests due to the emergence of intelligent wearable technology. Electrically conductive fibers are desirable candidates for flexible strain sensors, but up til now, there still exist enormous challenges to obtain conductive fibers exhibiting simultaneously high stretchability and high strain sensitivity. This paper introduces a poly (styrene‐butadiene‐styrene) (SBS)/graphene (Gr) composite fiber‐based flexible strain sensor fabricated by a facile and highly scalable wet spinning method. The results demonstrate that the graphene content has significant influence on the morphology, mechanical properties, and electromechanical properties of the composite fibers. The fibers with 5 wt% graphene have a wide response range of up to 100% strain, a high electrical sensitivity with the gauge factor of 10083.98 at 100% strain, and meanwhile, a high level of stability for 2100 stretching–releasing cycles under an applied strain of 20%. Furthermore, the SBS‐5%Gr composite fibers display excellent sensing performance in detecting human upper limb movements at different joints including hand joints, wrist joints, elbow joints, and shoulder joints. 相似文献