通过改变有机改性粘土含量的浓度制备聚砜/尼龙 6,6 纳米复合材料的共连续形貌

IF 3.6 4区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
Tanmoy Rath, Ibrahim A Alnaser, Asiful H Seikh
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引用次数: 0

摘要

利用聚砜(PSU)和尼龙 6、6 以及有机改性粘土的熔融混合,制造出一种独特的形态,生产出聚砜和尼龙 6、6 的两种混合纳米复合材料成分(80/20 和 60/40 w/w)。使用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和广角 X 射线衍射(WAXD)对不同粘土用量的 PSU/尼龙 6、6 混合纳米复合材料的形态进行了研究。在 80/20(重量比)PSU/尼龙 6、6(不含粘土)的情况下,尼龙 6、6 分散在 PSU 基体中,平均粒径约为 6.81 微米(μm)。添加粘土(2%、4% 和 8%)后,尼龙 6、6 的畴尺寸减小,但减小速度比最初观察到的要慢得多。不过,我们发现当有机粘土的含量超过 2% 时,60/40(重量比)共混物的基体-畴结构会转变为共连续形态。TEM 研究清楚地表明,有机粘土优先位于尼龙 6、6 相中,表现出高度的剥离性,而纳米复合材料的 PSU 相中仍然没有粘土,无论其含量多少。这项研究表明,分散在 PSU/Nylon 6, 6 混合物中的粘土小板的尺寸在决定这些混合物的形态和稳定性方面起着重要作用。此外,共连续结构在高温下进一步退火时也很稳定,从而抑制了分散相的凝聚,并降低了界面张力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fabrication of co-continuous morphology of polysulfone/nylon 6, 6 nanocomposites by varying the concentration of organically modified clay content
A unique morphology was fabricated using melt mixing of polysulfone (PSU) and nylon 6, 6, as well as organically modified clay to produce two blended nanocomposite compositions (80/20 and 60/40 w/w) of polysulfone and nylon 6, 6. The morphology of PSU/Nylon 6, 6 blend nanocomposites with various amounts of clay has been examined using scanning electron microscope (SEM), transmission electron microscope (TEM), and wide-angle X-ray diffraction (WAXD). In the case of 80/20 (w/w) PSU/Nylon 6, 6 without clay, the Nylon 6, 6 is dispersed in the PSU matrix with an average particle size of about 6.81 micrometers (μm). After adding clay (2%, 4%, and 8%), the domain size of nylon 6, 6 decreases, although the decrease rate is much slower than initially observed. However, we discovered that when the organoclay level exceeds 2%, the matrix-domain structure transforms into a co-continuous morphology for the 60/40 (w/w) blends. The TEM studies clearly demonstrate that the organoclay preferentially positions itself in the nylon 6, 6 phase, exhibiting a high degree of exfoliation, while the PSU phase of the nanocomposites remains devoid of clay, irrespective of the amount present. This study indicates that the size of clay platelets dispersed in the PSU/Nylon 6, 6 blend plays an important role in determining the morphology and stability of these blends. Moreover, the co-continuous structures were stable against further annealing at high temperatures, thus inhibiting the coalescence of the dispersed phase in addition to reducing interfacial tension.
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来源期刊
Journal of Thermoplastic Composite Materials
Journal of Thermoplastic Composite Materials 工程技术-材料科学:复合
CiteScore
8.00
自引率
18.20%
发文量
104
审稿时长
5.9 months
期刊介绍: The Journal of Thermoplastic Composite Materials is a fully peer-reviewed international journal that publishes original research and review articles on polymers, nanocomposites, and particulate-, discontinuous-, and continuous-fiber-reinforced materials in the areas of processing, materials science, mechanics, durability, design, non destructive evaluation and manufacturing science. This journal is a member of the Committee on Publication Ethics (COPE).
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