Superslippery Long‐Chain Entangled Polydimethylsiloxane Gel with Sustainable Self‐Replenishment

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adem.202201530.

Sustainable Biofilm Inhibition Using Chitosan-Mesoporous Nanoparticle-Based Hybrid Slippery Composites

“…39,49,50 Third, when lubricant depletion occurs due to outward migration or shearing of the oil layer by strong external stress, resulting in degradation of the antifouling function, the oil contained inside the composites is released and supplied to the external surface without any additional stimuli (i.e., self-replenishing property). 40,51,52 These strategies may work synergistically, especially when the oil layer is partially or completely depleted and not fully replenished, as biofilm formation can still be prevented by the bactericidal effect of CTS. Based on these three strategies of bactericidal, antifouling, and self-replenishing, the hybrid slippery composite can effectively inhibit biofilm formation for a prolonged period without the use of environmentally toxic materials.…”

“…First, CTS, a nature-derived cationic polymer, was employed in PDMS networks, where the positive charge of the abundant amino groups interacts with the negative charge of bacterial cell walls, disrupting or damaging the cell membrane or cell wall. This electrostatic interaction provides an effective and environmentally friendly way of eliminating surface bacteria (i.e., bactericidal property). − Second, SO was employed in the PDMS-CTS networks to form a water-immiscible thin layer that effectively prevents the attachment of microorganisms or other substances to the surface (i.e., antifouling property). − In particular, MSN with numerous nanosized porous topographies with strong affinity to PDMS and SO, based on the silicon-based structural units, was introduced to improve oil absorption capacity. ,, Third, when lubricant depletion occurs due to outward migration or shearing of the oil layer by strong external stress, resulting in degradation of the antifouling function, the oil contained inside the composites is released and supplied to the external surface without any additional stimuli (i.e., self- replenishing property). ,, These strategies may work synergistically, especially when the oil layer is partially or completely depleted and not fully replenished, as biofilm formation can still be prevented by the bactericidal effect of CTS. Based on these three strategies of bactericidal, antifouling, and self-replenishing, the hybrid slippery composite can effectively inhibit biofilm formation for a prolonged period without the use of environmentally toxic materials.…”

“…36−39 In addition, a replenishment function that can release the oil layer from the inside and restore its function over time has been studied. 35,40 However, even with these approaches, once bacteria settle directly on the surface before the oil layer is replenished, they will accelerate the further development of the biofilm, resulting in the loss of antifouling function over the surface. 41,42 In essence, the ongoing challenge lies in developing biofilm inhibition technologies that simultaneously provide robust and sustainable antifouling functions over long periods without the use of toxic and environmentally harmful materials, requiring further advancements in the field.…”

“…Recently, inspired by the lubricating functions of natural organisms such as pitcher plants, algae, and loach skin, biomimetic slippery liquid-infused porous surfaces (SLIPS) have been introduced as a strong candidate for nontoxic antifouling technology. , SLIPS, which typically consist of a porous structure, can contain a thin lubricant layer on their surface that is immiscible with external fluids and substances due to the low surface tension . Contrary to previous studies, SLIPS prevent the fundamental attachment of bacteria based on their slippery properties. , Although the surface lubricant layer provides a surface environment that is completely isolated from external contaminants in a nontoxic manner, lubricants are easily depleted by physical contact or shear flow, resulting in the degradation or depletion of their lubricating functions. − To improve the long-term use of SLIPS, several studies have introduced liquid-infused surfaces with improved oil absorption capacity based on the integration of silica (SiO 2 ), titania (TiO 2 ), and carbon (C) porous nanoparticles. − In addition, a replenishment function that can release the oil layer from the inside and restore its function over time has been studied. , However, even with these approaches, once bacteria settle directly on the surface before the oil layer is replenished, they will accelerate the further development of the biofilm, resulting in the loss of antifouling function over the surface. , In essence, the ongoing challenge lies in developing biofilm inhibition technologies that simultaneously provide robust and sustainable antifouling functions over long periods without the use of toxic and environmentally harmful materials, requiring further advancements in the field.…”

Preparation and performance testing of novel bendable optically transparent fluorinated hyperbranched linear long chain segment poly(amide-imide) films

“…[13][14][15][16][17][18] Thirdly, the increased entanglement of molecular chains improves the self-supporting ability of the polymer, thereby resulting in enhanced film formation capabilities due to the growth of molecular chain segments. [19][20][21][22][23][24][25][26] Fourthly, these polymers have good optical properties and a low dielectric constant due to the unique spatial geometry configuration of their hyperbranched structure. [27][28][29][30][31][32][33][34][35][36] Fascinating developments have been made in recent years.…”