[ASAP] Bactericidal Lubricating Synthetic Materials for Three-Dimensional Additive Assembly with Controlled Mechanical Properties

4 years ago

[ASAP] Bactericidal Lubricating Synthetic Materials for Three-Dimensional Additive Assembly with Controlled Mechanical Properties

Jihoon Ahn, Yale Jeon, Kang Won Lee, Jonghun Yi, Sun Woo Kim, Dong Rip Kim

3D printable synthetic materials have been developed to realize desired surface and mechanical properties. Lubricating synthetic surfaces have broad technological impacts on many applications including food packaging, microfluidic systems, and biomedical devices. However, combining soft materials with lubricants leads to significant phase separation and swelling phenomena, together with lowered mechanical strength, impeding full utilization of lubricating synthetic surfaces with desired shapes in a highly controllable manner. Here, we report a new platform to create a 3D printable lubricant–polymer composite (3D-LUBRIC) for the seamless fabrication of multidimensional structures with diverse functionalities. The rationally designed lubricant–polymer mixtures including silica aerogel particles not only exhibit suitable rheological properties for direct ink writing without phase separation but also enable the deterministic additive assembly of heterogeneous materials, which have large mismatches of oil permeability, with no distinct shape distortion. While exhibiting excellent lubricating properties for a variety of liquids, 3D-LUBRIC shows tunable mechanical properties with desired functionalities, such as optical transparency, flexibility and stretchability, and anti-icing and antibacterial/bactericidal properties. We employ the proposed platform to fabricate self-cleanable containers and antibacterial/bactericidal medical tubes. Our platform can offer new opportunities for building low-adhesive, multifunctional synthetic materials with customized shapes for diverse applications. The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsami.0c05764. 3D printing of an artificial pitcher plant with the 3D-LUBRIC ink (MP4) Self-cleaning performance of the 3D-printed container by silicone-3D-LUBRIC (MP4) Video to show slippery properties of transparent, silicone-3D-LUBRIC (MP4) Stretchability of the 3D-printed LUBRIC polymer (MP4) Effects of SAPs in 3D-LUBRIC ink formulation; apparent viscosity of PFPE- and silicone-3D-LUBRIC inks; rheological properties of PLA-3D-LUBRIC inks; ESEM images of lubricating scaffolds printed by the PFPE-3D-LUBRIC blend (20 wt % fluorinated oil and 10 wt % SAPs) and PLA-3D-LUBRIC blend (25 wt % olive oil; 5 wt % SAPs); silicone-3D-LUBRIC before and after curing process; light reflectance measurements of the silicone elastomer, the silicone elastomer mixed with 5 wt % SAPs, and the silicone-3D-LUBRIC (silicone oil (1000 cs), 45 wt % oil, and 5 wt % SAPs); representative force–position profiles of ice adhesion tests; CLSM images of the surfaces; optical densities at a wavelength of 590 nm of the commercial silicone tube, 3D-LUBRIC tube, bactericidal 3D-LUBRIC tube after 24 h cultivation; calculation results of the Flory–Huggins solubility parameter (χ_FH); critical SAs (°) of various liquids; mechanical properties of 3D-LUBRIC with different mixing ratios of components; ice adhesion strengths of silicone- and PFPE-3D-LUBRIC polymers; the measured CFUs with E. coli medium; CFU count and normalized optical density (A₅₉₀) of the commercial silicone tube, 3D-LUBRIC tube, and bactericidal 3D-LUBRIC tube under static flow conditions with P. aeruginosa medium; and CFU count and normalized optical density (A₅₉₀) of the commercial silicone tube, 3D-LUBRIC tube, and bactericidal 3D-LUBRIC tube in dynamic flow conditions with P. aeruginosa medium (PDF) This article has not yet been cited by other publications.

Publisher URL: http://feedproxy.google.com/~r/acs/aamick/~3/hJISsfu-jGA/acsami.0c05764

DOI: 10.1021/acsami.0c05764