Biomimetic porous polypropylene foams with special wettability properties

Huang, Pengke; Wu, Fei; Shen, Bin; Zheng, Hao; Ren, Qian; Luo, Haibin; Zheng, Wenge

doi:10.1016/j.compositesb.2020.107927

Cited by 26 publications

(17 citation statements)

References 55 publications

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“…The surface free energy (SFE) for coated papers was determined by measuring the contact angles (θ) between the solid surface (coated papers) and the test liquids, with known surface tensions (water), free surface energies of the coated papers were calculated using automatic Owens, Wendt, Rabel, and Kaelble (OWRK) calculation method [28,29]. The OWRK method is the most frequently used method for the determination of SFE (γ) of polymer surfaces, along with their polar (γ p ) and dispersive (γ d ) part.…”

Section: Surface Free Energy Measurement Methodsmentioning

confidence: 99%

Application of Polyvinyl Acetate/Lignin Copolymer as Bio-Based Coating Material and Its Effects on Paper Properties

Zhang

Liu

et al. 2021

Coatings

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In this work, lignin-vinyl acetate copolymers containing different fractions of lignin were synthesized by the copolymerization technique. The synthesized copolymer was successfully applied to coat the paper for enhancing its properties and performance. The effects of the lignin-vinyl acetate copolymer on the physicochemical, air permeability and mechanical properties of paper were investigated. The mechanical strength, hydrophilic, and air permeability properties of coated paper were improved with the increasing content of the lignin. Lignin-vinyl acetate copolymer containing 15% lignin coated paper exhibited a 1.86 times increase in the tensile index, 45 times increase in the water contact angle, and a 41.1% reduction in the air permeability compared with uncoated paper. Scanning electron microscopy was applied to study the morphology of the coated and uncoated paper. The results showed that paper surface porosity structure was decreased, while the surface smoothness was enhanced considerably with increasing lignin fraction in the copolymer. Therefore, the successful fabrication of such an enchanting coated paper may afford new potential and great applications in the packaging paper.

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Section: Surface Free Energy Measurement Methodsmentioning

confidence: 99%

Application of Polyvinyl Acetate/Lignin Copolymer as Bio-Based Coating Material and Its Effects on Paper Properties

Zhang

Liu

et al. 2021

Coatings

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“…In a recent study, PP surface was treated with argon coupled plasma for the formation of hydroperoxides on its surface, which chemically reacted with DA as shown in Figure 5 [45]. In other studies, PP surface was treated (oxidized) with alkali or acid and then chemically modified with DA by a simple dip coating [54][55][56]. In another approach, PP nonwoven fabrics were grafted with 3-isopropenyl-α,α ′ -dimethylbenzene isocyanate and covalent coupling between isocyanate and amine group of DA resulted in the modified surface [57].…”

Section: Strategies Of the Surface Engineering/ Modificationmentioning

confidence: 99%

Surface engineering of personal protective equipments (PPEs) to prevent the contagious infections of SARS-CoV-2

Pandey

2020

Surface Engineering

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The outermost surfaces of Personal Protective Equipments (PPEs) interact with virus surfaceprotein as the first step during its transmission from aerosols and contacting surfaces, which can be tuned by surface engineering/modification. This report highlights the role of engineered surface chemistry of PPEs to avoid the spreading of the novel SARS-CoV-2 virus in hospitals. Physical properties of surfaces and spike-glycoprotein are correlated with the reported stability of SARS-CoV-2. The spike-protein is reported to be hydrophobic in nature with an isoelectric point of 5.9. Hence surface with both positive charge and hydrophobic groups are expected to achieve a strong binding with the surface spike-protein. Various surface engineering strategies of polypropylene and other materials with hybrid selfassembled monolayers and dopamine are discussed to design the mixed hydrophobic and charged surfaces. The strong surface-protein interactions may lead to severe conformational changes and destabilization of the viral envelope, which can disintegrate and inactivate the novel coronavirus.

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“…Inspired by nature, researchers began to have a strong interest in the study of the diversity and mechanical properties of porous media, and began to design and analyze the mechanical behavior of different porous media materials and structures. Cellular media materials have been widely used in packaging boxes, transportation, for daily necessities, industrial manufacturing, national defense, military industries, and in biomechanical research (substrate material of elastic matrix sensor) [ 8 ], due to their many advantages including their efficient heat and sound insulation, good compression, mechanical properties and ductility, and low cost [ 9 , 10 , 11 , 12 , 13 , 14 ].The mechanical properties of a cellular medium are determined by both matrix and cell structure. Investigating the constitutive relationship between these can help us better understand the mechanical properties of a material and have an irreplaceable effect on the optimization of its properties [ 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

A Review on Mechanical Models for Cellular Media: Investigation on Material Characterization and Numerical Simulation

et al. 2021

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Cellular media materials are used for automobiles, aircrafts, energy-efficient buildings, transportation, and other fields due to their light weight, designability, and good impact resistance. To devise a buffer structure reasonably and avoid resource and economic loss, it is necessary to completely comprehend the constitutive relationship of the buffer structure. This paper introduces the progress on research of the mechanical properties characterization, constitutive equations, and numerical simulation of porous structures. Currently, various methods can be used to construct cellular media mechanical models including simplified phenomenological constitutive models, homogenization algorithm models, single cell models, and multi-cell models. This paper reviews current key mechanical models for cellular media, attempting to track their evolution from their inception to their latest development. These models are categorized in terms of their mechanical modeling methods. This paper focuses on the importance of constitutive relationships and microstructure models in studying mechanical properties and optimizing structural design. The key issues concerning this topic and future directions for research are also discussed.

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Biomimetic porous polypropylene foams with special wettability properties

Cited by 26 publications

References 55 publications

Application of Polyvinyl Acetate/Lignin Copolymer as Bio-Based Coating Material and Its Effects on Paper Properties

Application of Polyvinyl Acetate/Lignin Copolymer as Bio-Based Coating Material and Its Effects on Paper Properties

Surface engineering of personal protective equipments (PPEs) to prevent the contagious infections of SARS-CoV-2

A Review on Mechanical Models for Cellular Media: Investigation on Material Characterization and Numerical Simulation

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