纳米电气石/聚丙烯驻极熔喷非织造布的研制

研制了一种纳米电气石改性驻极体熔喷聚丙烯非织造布母粒,并采用电晕放电法制备出纳米电气石/聚丙烯驻极熔喷非织造布。探讨了纳米电气石在聚丙烯树脂中的分散状况及改性母粒的流变性能,同时对非织造布力学性能、表面电荷密度和过滤性能进行了测试。结果表明:电气石能较好地分散在聚丙烯树脂中;加入特种电气石之后,纤网的机械性能有所下降;驻极体熔喷非织造布的驻极效果大大改善,其表面电荷密度、过滤性能均有明显提高。     

丙烯基弹性体增韧聚乳酸熔喷成型及性能

为探究丙烯基弹性体(PBE)对聚乳酸(PLA)/PBE熔喷非织造材料的性能影响,以PBE共混改性PLA制备了PLA/PBE熔喷非织造材料,对其形貌结构、直径分布、力学性能、透气和过滤性能进行测试与表征.结果表明,随着PBE含量的增加,PLA/PBE熔喷非织造材料的平均直径呈现先减小后增大的趋势,最小平均直径是3.96μ...     

血液过滤用熔喷PBT非织造布紫外辐照接枝改性研究

研究了血液过滤用熔喷PBT非织造布的紫外辐照气相接枝改性方法。通过实验选择了丙烯酸(AAc)为接枝单体 ,探讨光照时间、预辐照时间、单体温度、引发剂浓度、氮气压力对接枝率和表面润湿张力的影响 ,结果得到最佳的紫外辐照接枝条件为 :室温下 ,光距 2 0cm ,预浸 10min ,二苯甲酮 (BP) 0 .0 37mol/L ,冲入单体的氮气流量 87.5h/L ,反应时间 30min。PBT非织造布AAc紫外辐照接枝后表面润湿张力可以达到 85mN/m左右 ,且表面润湿张力随接枝率的提高而增加     

聚对苯二甲酸丁二酯非织造布复合滤材的制备及性能

介绍了高熔融指数聚对苯二甲酸丁二酯(PBT)熔喷非织造布复合滤材在动力机车燃油过滤方面的重要作用及其加工制备过程。研究了成型压力和黏合剂使用量对复合滤材厚度、透气性能及孔径大小的影响。比较分析了PBT非织造布与滤纸的性能差异以及试验制备的复合滤材与进口样品的性能差异,并测试了复合滤材滤水效率、不同尺寸杂质过滤效率及纳污容量。     

聚丙烯熔喷非织造材料电晕驻极处理研究

利用电晕驻极技术处理聚丙烯熔喷非织造材料,讨论了驻极电压、驻极时间以及两电极之间距离等工艺参数对滤料性能的影响,研究了驻极处理后聚丙烯过滤材料表面形貌结构的变化。结果表明:经过驻极处理后,聚丙烯熔喷非织造材料纤维表面略现粗糙;随着驻极电压和时间的增加,材料表面静电电位呈现逐渐增加后下降的趋势,随着电极距离的增加,材料表面静电电位逐渐下降;驻极处理后,聚丙烯熔喷材料的过滤效率显著提高,但透气性未发生显著变化;在存储过程中,驻极聚丙烯过滤材料的表面电位在初期迅速衰减,以后变化趋缓。     

滤材用聚对苯二甲酸丁二酯熔喷非织造布的研制

利用熔喷非织造成网系统,制备了滤材用高熔融指数的聚对苯二甲酸丁二酯(PBT)熔喷非织造布,分析了空气压力、接收距离、泵供量等成网工艺参数对产品性能的影响。结果表明:工艺参数对纤网中PBT纤维的形态和结构,对PBT熔喷非织造布的纤维直径、面密度、断裂强力以及孔隙直径都产生了很大的影响。     

聚乳酸静电纺/熔喷复合纤维膜的制备

用熔喷非织造布设备制备聚乳酸(PLA)熔喷非织造布,并以此作为接收基布,将PLA静电纺纤维喷覆在上面,制得PLA静电纺/熔喷复合纤维膜.对比分析了 PLA熔喷非织造布和静电纺/熔喷复合纤维膜的表观形貌、纤维直径及直径分布,测试了孔径大小及其分布、过滤效率、透气性和力学性能,得出如下结论:PLA静电纺纤维直径分布主要在2...     

静电纺/熔喷醋酸丁酸纤维素复合膜的制备及性能研究

采用熔喷法及热轧处理制备醋酸丁酸纤维素(CAB)非织造布;然后以体积比6:4的丙酮与乙酸为溶剂,通过静电纺丝制备CAB纳米纤维并沉积在熔喷CAB非织造布表面,制得静电纺/熔喷CAB复合膜;对复合膜的孔径、过滤效率和透气性进行测试.结果表明:当纺丝溶液CAB质量分数为30％,纺丝电压为18 kV,喂液速率为0.2 mL/...     

聚丙烯熔喷非织造布基导电复合柔性薄膜制备与性能

以聚丙烯(PP)熔喷非织造布和聚偏氟乙烯(PVDF)为原料，采用氧化石墨烯(GO)和AgNO₃对PP熔喷非织造布进行导电改性，在其表面浇铸PVDF溶液制得具有三明治结构的PVDF/PP熔喷非织造布复合柔性薄膜。通过扫描电子显微镜、傅里叶变换红外光谱仪、数字万能表、万能试验机对熔喷非织造布及改性试样的形貌结构、表面组成、电阻率及力学性能进行分析。结果表明：PP熔喷非织造布经GO和AgNO₃改性后导电效果显著，电阻率最低可达46.5Ω·m。对复合柔性薄膜的力传感性能进行测试，发现结合S型电极片时其压力传感灵敏度最好，在传感器检测显示模组100 g量程内数值稳定仅需5 s，有望在压力检测和人体运动监测领域发挥重要作用。     

低温等离子体技术在非织造材料表面改性中的应用

介绍了低温等离子体技术的基本原理,及其应用于非织造材料表面改性的方法;详述了低温等离子体技术在非织造材料表面改性中的应用现状及发展趋势。低温等离子体技术应用于非织造材料表面改性主要分为等离子体表面处理改性、等离子体沉积聚合、等离子体接枝聚合3种方法;采用低温等离子体技术可以显著改善非织造材料表面的润湿性、染色性、粘结性和血液过滤性能等;低温等离子体技术在非织造材料领域具有广阔的发展前景,今后应加大对低温等离子体改性机理及其处理效果的时效性等方面的研究,促进其产业化发展。     

Fabrication of stretchable and high-filtration performance melt-blown nonwoven webs for PM0.3 aerosol filtration

Polypropylene (PP) is a semi-crystalline polymer that displays simple manufacturing, high stiffness, lightweight, chemical resistance, and inexpensive. However, PP has significant drawbacks, such as poor brittleness at low temperatures, high shrinkage ratio, and low impact resistance, which limit its development. Thermoplastic polyurethane (TPU) possesses recyclable and eco-friendly characteristics, along with the elasticity of rubber and exceptional mechanical properties. In this study, a flexible and high-filtration performance PP-TPU textile material was developed by melt-blowing for filtering PM_0.3 aerosols. For the first time, a melt-blown PP-TPU nonwoven was used as an air filter. The fiber morphological studies exhibited that addition of 10 and 20 wt.% TPU into PP resulted in a fiber diameter increment from 0.94 to 1.24 μm. Also, melt-blown PP-TPU forms helical fibers, which are different from fibers noticed in melt-blown PP. Corona-charged double-layer 80PP-20TPU nonwovens have a filtration efficiency of 99.25% and quality factor (QF) of 0.13 mm H₂O⁻¹ at an air flow rate of 95 L/min. Moreover, PP's tensile strength was increased by 72.22%, and elongation was raised by 38.1% with the addition of 20 wt.% TPU. Thus, PP-TPU melt-blown composites may bring novel perspectives into the design and development of high-performance filtering materials for a variety of applications.     

浅谈熔喷非织造布工艺参数对产品性能的影响

讨论了接收距离、热风速度和温度、工作区温度等工艺参数对熔喷产品拉伸强力、断裂伸长率、过滤效率和过滤阻力等性能的影响,并分析了多重因素的影响,有助于提高产品性能和质量。     

紫外辐照接枝HEMA改性血液过滤用PBT无纺布的研究

研究了在紫外辐照条件下,以二苯甲酮(BP)为光敏剂,以甲基丙烯酸羟乙酯(HEMA)作为表面接枝物来改性血液过滤用聚对苯二甲酸丁二醇酯(PBT)无纺布,并对接枝改性后PBT进行了红外分析、扫描电镜观察、亲水性能测试.结果显示:红外图谱证实了HEMA在紫外辐照和光敏剂BP的引发条件下成功接枝到PBT 无纺布纤维表面,光敏剂...     

Silk‐inspired polyurethane containing GlyAlaGlyAla tetrapeptide. II. physical properties and structure

Biomedical polyurethane (BPU) and silk fibroin have similarly molecular architecture in their primary and aggregate structure, both of which have amide bonds and microphase separation, and they have been employed as scaffold materials for biomedical applications. Based on this, as the featured peptide sequence of silkworm silk fibroin, GlycineAlanineGlycineAlanine (GlyAlaGlyAla) tetrapeptide was synthesized by using traditional liquid‐phase peptide synthesis method with Boc‐protected glycine and alanine as starting materials, and was transformed to its derivative with two amine‐terminated functional groups. The derivative was introduced as a chain extender into the backbone to form the hard segment of a silk‐inspired PU with urea‐linkage. Related measurements show that molecular weight of the synthesized silk‐inspired PU ranged from 13,000 to 15,000. Fourier transform infrared (FTIR) absorption bands of Amides I and II are at 1651 cm^?1 and 1534 cm^?1, and Raman absorption band of Amide III is at 1302 cm^?1. UV‐Vis absorption peak of the silk‐inspired PU is at 266 nm. This new concept and strategy may allow the fabrication of a new class of thermoplastic polyurethane elastomers to mimic the structure and properties of silk fibroin of silkworms and spiders. Information provided by this study may be used to better understand the correlation between the natural and man‐made materials. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

丝素蛋白改性聚氨酯膜的研制

用预聚体接枝 -扩链法制备了丝素蛋白改性聚氨酯膜 ,考察了反应温度、时间和湿度等因素对膜的力学性能的影响。结果表明改性聚氨酯膜具有良好的柔韧性 ,其力学性能明显优于纯丝素膜。     

Process optimization of electrospun silk fibroin fiber mat for accelerated wound healing

Considering the outstanding biocompatibility of Bombyx mori silk fibroin, this study is designed to fabricate biomimetic nanofibrous structure made of silk fibroin, which can enhance cell activities for tissue formation. The electrospinning of blend of silk fibroin with low molecular weight poly(ethylene‐oxide) (PEO) is explored with ease of preparation for high productivities. The average diameter of electrospun silk fibroin (eSF) is decreased from 414 ± 73 to 290 ± 46 nm after PEO extraction. To induce the desired cellular activity, the surface of the eSF fibers is modified with fibronectin by using the carbodiimide chemistry method. The potential use of the obtained wound healing material is assessed by indirect cytotoxicity evaluation on normal human dermal fibroblast (NHDF) in terms of their attachment and cell proliferation. The surface‐modified eSF nanofiber mats show good support for cellular adhesion and spreading as a result of fibronectin grafting on the fiber surface, especially for cell migration inside the fibrous structure. These results demonstrate a new fabrication technique of surface‐modified silk fibroin electrospun nanofibers for biomedical application; with the ability to accelerate wound healing. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3634–3644, 2013     

聚乳酸复合空气过滤材料的制备及性能研究

以分子质量为7万的聚乳酸（PIA）为原料,分别用不同的溶剂制得两种纺丝液,并采用静电纺丝法将其分别纺在水刺无纺布和熔喷无纺布上,采用TSI8130仪器对阻力和效率进行测试,比较两者的过滤性能。结果表明：当纳米纤维膜厚度为2mm左右时,水刺非织造布与纳米纤维的复合材料过滤效率从近乎0提高到45．88％,当纳米材料厚度为1mm左右时,提高到26．12％;熔喷非织造布分别与1mm和2mm厚度的纳米纤维膜复合后过滤效率分别提高了23．7％和24．6％,但缺点是过滤阻力提高。