Preparation of a Novel Type of Zwitterionic Polymer and the Antifouling PDMS Coating

Ma, Xutao; Fu, Xiaohui; Sun, Jing

doi:10.3390/biomimetics7020050

Cited by 3 publications

(3 citation statements)

References 40 publications

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“…The pristine PDMS surfaces typically possess good biocompatibility. [ 17 ] The hemolytic assay of PDMS before and after functionalization was evaluated toward human mammalian red blood cells (hRBCs) ( Figure 8 ). The hemolysis rates of the polypeptoid sulfonium‐coated PDMS surfaces are quite similar to the pristine PDMS surfaces, and the hemolysis ratios of all samples are less than 0.5%.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Antifouling/Antimicrobial Polysulfonium‐Coated Surface Against Biofilms and Water Bacterial Contamination

Lin

Sun

et al. 2023

Advanced NanoBiomed Research

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Bacterial attachment and colonization on the surface have caused a severe threat to human healthcare. The development of surface coatings with high antibacterial activity and low toxicity is highly desired. Herein, a series of sulfonium‐containing polypeptoids with various structural motifs on the side chains is synthesized, which are efficiently grafted on the silicone surface via plasma and ultraviolet light treatment. The resulting coating demonstrates excellent antibacterial properties against both Gram‐positive and Gram‐negative bacteria, as well as a sustained antibacterial effect at ambient temperature for up to one week. Moreover, the coating exhibits excellent in vitro antibiofilm and protein resistance properties, as well as excellent hemo/biocompatibility. Further, by fabricating a decontamination system with the coated substrates, the obtained coating materials show high efficiency in bacterial decontamination of water, which has great potential for use in water disinfection systems. All these results suggest that prepared coating with dual antibacterial and antifouling properties has great potential in combating bacterial contamination.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Antifouling/Antimicrobial Polysulfonium‐Coated Surface Against Biofilms and Water Bacterial Contamination

Lin

Sun

et al. 2023

Advanced NanoBiomed Research

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“…Thus, a universal, durable, and easily applicable method of coating zwitterionic materials on conventional hydrophobic substrates is key to their actual applications. Many strategies have been applied to attach zwitterionic materials to conventional substrates, including grafting, , plasma treatment, , and initiator-buried hydrogel skin. , Most of them require complex pretreatments of the substrate and strict reaction conditions, limiting the complete coverage on complex structures and at a large scale. An easily taped hydrogel coating by superglue was published by our lab, and this design achieved easy operation, zero bacterial adhesion, and long durability of up to 3 months …”

Section: Introductionmentioning

confidence: 99%

Zwitterionic Hydrogel Coating with Antisediment Properties for Marine Antifouling Applications

Song,

Zhang,

Shi

et al. 2024

ACS Appl. Mater. Interfaces

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Biofouling is a serious issue affecting the marine industry because the attached micro-and macrocontaminants can increase fuel consumption and damage ship hulls. A hydrophilic hydrogel-based coating is considered a promising antifouling material because it is environmentally friendly and the dense hydration layer can protect the substrate from microbial attachment. However, sediment adsorption can be an issue for hydrogel-based coatings. Their natural soft and porous structures can trap sediment from the marine environment and weaken the antifouling capability. There is still little research on the antisediment properties of hydrogels, and none of them deal with this problem. Here, we report on optimizing zwitterionic hydrogel-based coatings to improve their antisediment properties and achieve comparable performance to commercial biocidal coatings, which are the gold standard in the antifouling coating area. After 1 week of sediment contamination and 2 weeks of diatom coculturing, this optimized zwitterionic hydrogel coating maintained its antifouling properties with a few diatoms on the surface. Its large-scale samples also achieved antifouling performance similar to that of biocidal coatings in the Atlantic Ocean for 1.5 months. More importantly, our research provides a universal strategy to improve the antisediment properties of soft hydrogel-based coatings. For the first time, we report that the introduction of interfacial electrostatic interactions enhanced the antisediment properties of hydrogels.

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“…As a cushion carrier in the packaging structure, the cushioning material plays the main role of protecting high-precision bearings, which can decrease the influence of external shock and vibration, and absorb most of the energy of external shocks and vibrations suffered by high-precision bearings in the process of storage, transportation and turnover. Zhang Zhenyu proposed a cushion packing pad made of polydimethylsiloxane (PDMS) [6][7][8] for aviation bearings to improve the protection of bearings [9]. Yu Min et al used 3D printing technology to fabricate thermoplastic polyurethane (TPU) cubic foam samples of different densities and sizes, and carried out mechanical compression tests, through comparative analysis, TPU materials have better cushioning performance [10,11], and medium-sized TPU cubic foam has the best mechanical properties [12].…”

Section: Introductionmentioning

confidence: 99%

Cushioning Performance of the Biomimetic Cobweb Cushioning Silicone Pad

Liao

Tian

et al. 2023

Biomimetics

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At present, the packing method of “plastic bag–buffer packing–packing paper box” is adopted for bearing packaging. However, the common packing method has a poor packing effect and poor versatility. In this study, a new biomimetic cobweb cushion is proposed to solve the problem of insufficient cushioning capacity of high-precision bearing cushion packaging pads. First, according to the nature of cobweb form, the cobweb cushion structure configuration is determined. Next, based on the structure of the cushion and the relationship between the parameters of radial thread and spiral thread, a mechanical and target optimization model is established. The stress nephogram of bearing and the cobweb cushion are analyzed under three drop heights of 381, 610, and 700 mm, in the finite element simulation software to ensure that the maximum bearings stress is not beyond the material yield strength. Via the 3D printing technology, a cobweb cushion shell cast is made. Drop tests of the bearing were performed, and the results were verified with the finite element simulation analysis. This research can provide technical support for the protection of high-precision bearings from accidental drops during transportation.

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Preparation of a Novel Type of Zwitterionic Polymer and the Antifouling PDMS Coating

Cited by 3 publications

References 40 publications

Fabrication of Antifouling/Antimicrobial Polysulfonium‐Coated Surface Against Biofilms and Water Bacterial Contamination

Fabrication of Antifouling/Antimicrobial Polysulfonium‐Coated Surface Against Biofilms and Water Bacterial Contamination

Zwitterionic Hydrogel Coating with Antisediment Properties for Marine Antifouling Applications

Cushioning Performance of the Biomimetic Cobweb Cushioning Silicone Pad

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