Permeability and mechanical properties of nanoclay/epoxy liner used in type IV liquid oxygen vessel: experimental and numerical study

IF 2.4 3区 化学 Q3 POLYMER SCIENCE
Amirreza Ardebili, Mohammad Hossein Alaei, Amir Kaveh, Jafar Eskandari Jam
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Abstract

Consideration of the permeability and safety aspects of liquid oxygen (LOX) storage is of particular importance, because oxygen leaks can break down spacecraft missions. In this study, the effect of adding nanoclay to epoxy resin on the bending and tensile capacities of a clay/epoxy nanocomposite for using as a liner in type IV LOX was investigated experimentally and statistically. Consequently, samples were initially made with different nanoclay contents (0.5%, 1%, 3%, and 5% all by weights) using two distinct dispersion processes (HSS and ultrasonic), then evaluated using bending, tensile, and permeability testing methods, as well as scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD). In the optimal sample with 1% (weight) of nanoclay mixed with ultrasonic process, the permeability was reduced by 35%, the Young's modulus was improved by 3.5 times, and the toughness and fracture energy were increased by 3 times compared to the pure resin. However, all samples lost between 10 and 20% of their tensile strength due to the breakage of polymer chain links. Simulation findings revealed that at burst pressure, the tank with modified resin liner deforms four times less than PP and 50% more than PET without any rupture.

Graphical abstract

Abstract Image

用于 IV 型液氧容器的纳米粘土/环氧衬垫的渗透性和机械性能:实验和数值研究
考虑液氧(LOX)储存的渗透性和安全问题尤为重要,因为氧气泄漏会导致航天器任务失败。在本研究中,通过实验和统计学方法研究了在环氧树脂中添加纳米粘土对粘土/环氧纳米复合材料弯曲和拉伸能力的影响,该复合材料可用作 IV 型液氧衬垫。因此,首先使用两种不同的分散工艺(高速钢和超声波)制作了不同纳米含量(按重量计分别为 0.5%、1%、3% 和 5%)的样品,然后使用弯曲、拉伸和渗透测试方法以及扫描电子显微镜(SEM)、透射电子显微镜(TEM)和 X 射线衍射仪(XRD)进行了评估。与纯树脂相比,在超声波工艺中混合 1%(重量)纳米粘土的最佳样品的渗透性降低了 35%,杨氏模量提高了 3.5 倍,韧性和断裂能提高了 3 倍。然而,由于聚合物链节断裂,所有样品的拉伸强度都下降了 10% 到 20%。模拟结果表明,在爆破压力下,改性树脂内衬储罐的变形比聚丙烯小四倍,比 PET 大 50%,且不会发生任何破裂。
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来源期刊
Iranian Polymer Journal
Iranian Polymer Journal 化学-高分子科学
CiteScore
4.90
自引率
9.70%
发文量
107
审稿时长
2.8 months
期刊介绍: Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
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