Chemical and pressure stress resistance of polymer films

Laaber, Dmitrij; Bart, Hans‐Jörg

doi:10.1016/j.polymertesting.2014.09.018

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…These films range in thickness from a few angstroms (even molecular monolayers) to hundreds of micrometers, depending on the specific application. They are made of a wide variety of raw materials including metals, glasses, and polymers [2].…”

Section: Introductionmentioning

confidence: 99%

Temperature-dependent dynamic moduli of Parylene-C columnar microfibrous thin films

et al. 2016

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Columnar microfibrous thin films (µFTFs) of the polymer Parylene C with different microfiber inclination angles were fabricated using a physicochemical vapor deposition process whereby a collimated flux of hot monomers is obliquely directed towards a planar substrate. Each µFTF was then subjected to cyclic elastic loading in one of two orthogonal directions lying wholly in the substrate plane: either (i) normal or (ii) parallel to the morphologically significant plane of the µFTF. Dynamic storage and loss moduli were determined in the 1 to 80 Hz frequency range for temperatures between −40 • C and 125 • C. For all the columnar µFTFs, the storage and loss moduli for normal loading did not exceed their counterparts for parallel loading. All the columnar µFTFs were found to be softer than a bulk film of Parylene C. In both bulk and columnar forms, Parylene C was found to be rheologically not simple.

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Section: Introductionmentioning

confidence: 99%

Temperature-dependent dynamic moduli of Parylene-C columnar microfibrous thin films

et al. 2016

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“…Insu cient strength or low compressive resistance can result in rupture, deformation, or leakage [4]. When exposed to highly corrosive acidic or alkaline environments, the lter membrane may dissolve or expand, causing alterations in the material structure and changes in pore dimensions [5,6]. These changes can signi cantly reduce the lifespan and e ciency of the lter membrane [7].…”

Section: Introductionmentioning

confidence: 99%

Study on the mechanical properties of micropore organic polymer membranes

Liu,

Kang,

Zhang

et al. 2023

Preprint

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Micropore Organic polymer membranes are indispensable for membrane filtration with well-established selectivity and permeability. Pressure-driven conditions in harsh acidic or alkaline environments can influence the mechanical properties of these materials. Diminished mechanical properties may include a shortened membrane lifespan, reduced filtration effectiveness, and increased filtration cost. Understanding of the intricate mechanisms influencing the mechanical properties of organic polymer membranes remains incomplete. In this study, a comprehensive investigation was carried out to characterize the mechanical properties of different membrane materials with similar and varying pore size parameters. The influence of different methods of membrane preparation on the mechanical properties of these materials was also explored. The Young’s modulus, tensile strength, and elongation at break values were compared for two organic polymer membranes: polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF). Results showed that the PTFE membranes demonstrated excellent Young’s modulus and tensile strength, while PVDF membranes excelled in elongation at break. Notably, the PTFE membrane with a pore size of 0.45 µm demonstrated a 9.2% higher tensile strength and an impressive 153.5% greater elongation at break compared to the PTFE membrane with a pore size of 3.0 µm. Organic filter membranes prepared by the phase transition method exhibited a more structured fiber filament arrangement, a smoother surface, reduced crack formation and extension, and a uniform pore size and distribution when compared to materials prepared using the tensile method. The results of this study expanded our understanding of the factors that can influence the mechanical properties of organic filtration membranes. These results provide the theoretical basis to explore novel strategies to improve the dependability and effectiveness of membrane separation technology and reduce associated expenses.

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