scholarly journals Durable superoleophobic polypropylene surfaces

2016 ◽  
Vol 374 (2073) ◽  
pp. 20160193 ◽  
Author(s):  
Philip S. Brown ◽  
Bharat Bhushan
Keyword(s):  
High Temperature ◽  
Plastic Material ◽  
Polymer Surface ◽  
Polymer Surfaces ◽  
Surface Structures ◽  
Structured Surfaces ◽  
Mechanical Durability ◽  
Plastic Containers

Polypropylene (PP) is a popular plastic material used in consumer packaging. It would be desirable if such plastic containers were liquid repellent and not so easily fouled by their contents. Existing examples of superoleophobic surfaces typically rely on poorly adhered coatings or delicate surface structures, resulting in poor mechanical durability. Here, we report a facile method for creating superoleophobic PP surfaces via incorporation of nanoparticles (NPs) into the polymer surface. A solvent–NP–PP mixture was spin coated at high temperature to achieve the necessary roughness. Such surfaces were further functionalized with fluorosilane to result in a durable, super-repellent surface. They were also found to exhibit some repellency towards shampoos. This method of incorporating NPs into polymer surfaces could also prove useful in improving the anti-bacterial, mechanical and liquid-repellent properties of plastic devices. This article is part of the themed issue ‘Bioinspired hierarchically structured surfaces for green science’.

A Method for Predicting the Behavior of Plastics at Different Temperatures

2014 ◽  
Vol 1039 ◽  
pp. 107-111
Author(s):  
Yang Chen ◽  
Gui Qin Li ◽  
Bin Ruan ◽  
Xiao Yuan ◽  
Hong Bo Li
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Constitutive Model ◽  
Research And Development ◽  
Mechanical Behavior ◽  
Plastic Material ◽  
Different Temperatures ◽  
Plastic Parts

The mechanical behavior of plastic material is dramatically sensitive to temperature. An method is proposed to predict the mechanical behavior of plastics for cars, ranging from low-temperature low temperature ≤-40°C to high temperature ≥80°C. It dominates the behavior of plastic material based on improved constitutive model in which the parameters adjusted by a series of tests under different temperatures. The method is validated with test and establishes the basis for research and development of plastic parts for automobile as well.

Hierarchical Nano/Micro-structured Surfaces with High Surface Area/Volume Ratios

2021 ◽  
pp. 1-36
Author(s):  
Ketki Lichade ◽  
Yizhou Jiang ◽  
Yayue Pan
Keyword(s):  
Surface Structure ◽  
Surface Area ◽  
Light Trapping ◽  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Structure Design ◽  
Surface Structures ◽  
Structured Surfaces ◽  
Design And Manufacture

Abstract Recently, many studies have investigated additive manufacturing of hierarchical surfaces with high surface area/volume (SA/V) ratios, and their performance has been characterized for applications in next-generation functional devices. Despite recent advances, it remains challenging to design and manufacture high SA/V ratio structures with desired functionalities. In this study, we established the complex correlations among the SA/V ratio, surface structure geometry, functionality, and manufacturability in the Two-Photon Polymerization (TPP) process. Inspired by numerous natural structures, we proposed a 3-level hierarchical structure design along with the mathematical modeling of the SA/V ratio. Geometric and manufacturing constraints were modeled to create well-defined three-dimensional hierarchically structured surfaces with a high accuracy. A process flowchart was developed to design the proposed surface structures to achieve the target functionality, SA/V ratio, and geometric accuracy. Surfaces with varied SA/V ratios and hierarchy levels were designed and printed. The wettability and antireflection properties of the fabricated surfaces were characterized. It was observed that the wetting and antireflection properties of the 3-level design could be easily tailored by adjusting the design parameter settings and hierarchy levels. Furthermore, the proposed surface structure could change a naturally-hydrophilic surface to near-superhydrophobic. Geometrical light trapping effects were enabled and the antireflection property could be significantly enhanced (>80% less reflection) by the proposed hierarchical surface structures. Experimental results implied the great potential of the proposed surface structures for various applications such as microfluidics, optics, energy, and interfaces.

Laser-Induced Periodic Surface Structures (LIPSS) on Polymer Surfaces

2019 ◽  
pp. 143-155
Author(s):  
Esther Rebollar ◽  
Tiberio A. Ezquerra ◽  
Aurora Nogales
Keyword(s):  
Polymer Surfaces ◽  
Surface Structures ◽  
Periodic Surface

Application of variothermal heating concepts for the production of microstructured films using the extrusion embossing process

2012 ◽  
Vol 32 (2) ◽  
Author(s):  
Walter Michaeli ◽  
Stephan Eilbracht ◽  
Micha Scharf ◽  
Claudia Hartmann ◽  
Kirsten Bobzin ◽  
...  
Keyword(s):  
Temperature Profile ◽  
Large Scale ◽  
Cost Effective ◽  
Processing Parameters ◽  
Surface Structures ◽  
Structured Surfaces ◽  
Heating Systems ◽  
External Heating

Abstract The application of the extrusion embossing process is a fast and cost-effective way to produce large-scale films with structured surfaces. In principle, microscopic and macroscopic surface structures can be manufactured this way. Particularly for the fabrication of microscopic structures, the reproduction accuracy can be remarkably improved by applying variothermal heating concepts for the embossing roll. In this article, two possible heating concepts are investigated: one laser-based and another using an inductor. The generated temperature profile along the circumference of the embossing roll is studied, taking the material of the embossing roll as well as different processing parameters into account. Both external heating systems (laser vs. inductor) are tested and compared. Furthermore, the improvement of the accuracy of the replicated microstructures is examined.

TEM investigation of laser-induced periodic surface structures on polymer surfaces

2007 ◽  
Author(s):  
Úna Prendergast ◽  
Sylwester Kudzma ◽  
Richard Sherlock ◽  
Claire O'Connell ◽  
Thomas Glynn
Keyword(s):  
Polymer Surfaces ◽  
Surface Structures ◽  
Periodic Surface

Polymer surface structures determined using ToF-SIMS

2014 ◽  
Vol 33 (1) ◽  
Author(s):  
Chi-Ming Chan ◽  
Lu-Tao Weng ◽  
Yiu-Ting R. Lau
Keyword(s):  
Polymer Surface ◽  
Surface Structures ◽  
Tof Sims

Tailored Polymer Surfaces

MRS Bulletin ◽  
1997 ◽  
Vol 22 (1) ◽  
pp. 43-47 ◽  
Author(s):  
Anne M. Mayes ◽  
Sanat K. Kumar
Keyword(s):  
Statistical Mechanics ◽  
Chemical Modification ◽  
Surface Chemistry ◽  
First Principles ◽  
Surface Composition ◽  
Polymer Surface ◽  
Polymer Surfaces ◽  
Computing Power ◽  
Complex Chemical ◽  
Theoretical Approaches

The control of surface chemistry and topography has great technological relevance for numerous applications of polymers in textiles, adhesives, coatings, packaging, membranes, and biomedical implants. Conventionally, chemical modification of polymer surfaces has been achieved through kinetically governed practices that allow little control over the final surface composition or morphology. These chemically generated surfaces are also prone to reconstruction. Hence the development of inexpensive, scaleable routes to impart stable and more complex chemical functionality to polymer surfaces continues to be an active area of research. Apart from surface chemistry, the topography of a polymer surface often plays a determinant role in the adhesive, optical, and wetting characteristics of the surface. Consequently methods to produce surfaces of controlled texture are also of interest. Toward these goals, new, statistical, mechanics-based theoretical approaches, coupled with increased computing power, can now facilitate the first-principles design of polymer surfaces that are chemically and structurally “tailored” for a given application. In this article, we review some of the recent, significant developments in this area.

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