Siloxane Linkages Research Articles

Organosilane Modification of Lignin and Lignosulfonate: Structure and Compatibility in PVDF Membrane

The high difference in surface tension between the filler and the polymer often constrains membrane compatibility. To reduce the surface tension, organosilane such as GPTMS is usually used to improve miscibility. In this study, GPTMS was introduced to produce lignin-GPTMS (LG) and lignosulfonate-GPTMS (LsG). The modification was done by reacting lignin and lignosulfonate with GPTMS using ethanol as the media. The product was characterized using Fourier Transform InfraRed (FTIR), X-ray Diffraction (XRD), Particle Size Analyzer (PSA), Scanning Electron Microscope-Energy Dispersive X-ray (SEM-EDX) and microscope. The success of functionalization was shown in FTIR spectra with the vibration of Si-O at 1034 cm-1 and 528 cm-1. The XRD analysis presents that the filler material has an amorph and crystalline structure. The functionalization using a 2:1 ratio increases zeta potential absolute and particle size due to the silane being a bridge and making a larger macromolecule. For a ratio of 1:1, a higher organosilane compound results in breaking siloxane linkages and making smaller molecules. Mixed LG and LsG into PVDF membrane conducted to analyze filler compatibility. The sulfonation and functionalization of GPTMS increase the compatibility of lignin in PVDF membrane with the best homogeneity achieved by a membrane with the addition of LsG 1:1.

Room temperature nanoimprint aided by electron beam irradiation for polysilsesquioxane

Recently, the application of inorganic nano-periodic structures has become an active area of research. Polysilsesquioxane (PSQ) is known as a hydrolytically stable organic-inorganic hybrid material and this study proposes RT nanoimprint using methylated poly silsesquioxane (Me-PSQ) dissolved in a high-boiling solvent. PSQ electron beam cross-linked by a high electron beam irradiation maintained the shape of nanopatterns and enhanced the heat resistance. As a result of the analysis of the Fourier transform infrared spectrophotometer (FT-IR), a siloxane linkage (Si-O-Si bridging) constitutes a core element of PSQ. The peak wavenumber of Si-O-Si bridging at cross-linked PSQ by electron beam irradiation shifted from 1115 to 1135 cm−1. The peaks shifted towards the high wavenumber side and approached the second peak (1170 cm−1) of the Si-O-Si stretching vibration of quartz. This result suggests that the physical properties of electron-beam irradiated PSQ approach those of quartz.

Polymers from Plant Oils Linked by Siloxane Bonds for Programmed Depolymerization.

The increased production of plastics is leading to the accumulation of plastic waste and depletion of limited fossil fuel resources. In this context, we report a strategy to create polymers that can undergo controlled depolymerization by linking renewable feedstocks with siloxane bonds. α,ω-Diesters and α,ω-diols containing siloxane bonds were synthesized from an alkenoic ester derived from castor oil and then polymerized with varied monomers, including related biobased monomers. In addition, cyclic monomers derived from this alkenoic ester and hydrosiloxanes were prepared and cyclized to form a 26-membered macrolactone containing a siloxane unit. Sequential ring-opening polymerization of this macrolactone and lactide afforded an ABA triblock copolymer. This set of polymers containing siloxanes underwent programmed depolymerization into monomers in protic solvents or with hexamethyldisiloxane and an acid catalyst. Monomers afforded by the depolymerization of polyesters containing siloxane linkages were repolymerized to demonstrate circularity in select polymers. Evaluation of the environmental stability of these polymers toward enzymatic degradation showed that they undergo enzymatic hydrolysis by a fungal cutinase from Fusarium solani. Evaluation of soil microbial metabolism of monomers selectively labeled with 13C revealed differential metabolism of the main chain and side chain organic groups by soil microbes.

Thermodynamic Study of Alkylsilane and Alkylsiloxane-Based Ionic Liquids.

The thermodynamic properties of ionic liquids (ILs) bearing alkylsilane and alkylsiloxane chains, as well as their carbon-based analogs, were investigated. Effects such as the replacement of carbon atoms by silicon atoms, the introduction of a siloxane linkage, and the length of the alkylsilane chain were explored. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were used to study the thermal and phase behavior (glass transition temperature, melting point, enthalpy and entropy of fusion, and thermal stability). Heat capacity was obtained by high-precision drop calorimetry and differential scanning microcalorimetry. The volatility and cohesive energy of these ILs were investigated via the Knudsen effusion method coupled with a quartz crystal microbalance (KEQCM). Gas phase energetics and structure were also studied to obtain the gas phase heat capacity as well as the energy profile associated with the rotation of the IL side chain. The computational study suggested the existence of an intramolecular interaction in the alkylsiloxane-based IL. The obtained glass transition temperatures seem to follow the trend of chain flexibility. An increase of the alkylsilane chain leads to a seemingly linear increase in molar heat capacity. A regular increment of 30 J·K-1·mol-1 in the molar heat capacity was found for the replacement of carbon by silicon in the IL alkyl chain. The alkylsilane series was revealed to be slightly more volatile than its carbon-based analogs. A further increase in volatility was found for the alkylsiloxane-based IL, which is likely related to the decrease of the cohesive energy due to the existence of an intramolecular interaction between the siloxane linkage and the imidazolium headgroup. The use of Si in the IL structure is a suitable way to significantly reduce the IL's viscosity while preserving its large liquid range (low melting point and high thermal stability) and low volatilities.

Macromolecular Postpolymerization of Siloxane Exchange to Assemble Multiple Siloxane Linkages

Macromolecular Postpolymerization of Siloxane Exchange to Assemble Multiple Siloxane Linkages

Investigating Solvent-Induced Aggregation in Edge-Functionalized Layered Silicates via All-Atom Molecular Dynamics Simulations.

Molecular dynamics simulations can provide the means to visualize and understand the role of intermolecular interactions in the mechanisms involved in molecular aggregation. Along these lines, simulations can allow the study of how surface chemical modifications can influence nanomaterial assembly at the molecular level. Layered silicate clays have been of significant interest for some time, particularly with regard to their use in organic/inorganic nanocomposites. However, despite numerous reports on the covalent linkage of organic moieties via silanol condensation, the theoretical understanding of these systems has heretofore been limited to noncovalent interactions, specifically ionic interactions at the charged basal surfaces. Herein, a model for edge-functionalized layered aluminosilicate clay, based on the siloxane linkage, is presented. In addition to reproducing experimentally observed degrees of molecular aggregation of clay-linked perylene diimide derivatives with different terminal functional groups as a function of solvent composition, a molecular-level understanding of the role of van der Waals interactions and hydrogen bonding of the different end-groups on the aggregation state in different water/N,N-dimethylformamide mixtures is obtained. The reported model provides a means to simulate organic moieties covalently bound to the layered silicate edge, which will enable future simulations of nanocomposites and organic/inorganic hybrids based on this system.

Robert C. West (1928–2022): A Giant in Organosilicon Chemistry, Cosmopolitan, Mountain Climber and Pilot

Robert C. West (1928–2022): A Giant in Organosilicon Chemistry, Cosmopolitan, Mountain Climber and Pilot

Preparation of phthalonitrile resins containing siloxane linkages with improved processability

To improve the processability of biphenyl phthalonitrile resin, a flexible siloxane structure was introduced into the phthalonitrile monomer through molecular design, which was then blended with a biphenyl monomer to prepare phthalonitrile alloy resins. When the ratio of phthalonitrile monomer containing flexible siloxane to biphenyl phthalonitrile monomer was 1:1, the processing window widened from 58 to 110°C, as compared to that of biphenyl phthalonitrile. Due to the introduction of the biphenyl structure into the phthalonitrile alloy resins, the initial decomposition temperature of the silicon-containing phthalonitrile resin increased from 385 to 516°C. More importantly, the phthalonitrile alloy resin exhibited a high bending strength (66 MPa) and bending modulus (3762 MPa), indicating that it could be potentially applied as high temperature structural composite matrices. Furthermore, it provides a new strategy for processing phthalonitrile resins with a high melting point and narrow processing window.

Thermochromic Fenestration Elements Based on the Dispersion of Functionalized VO2 Nanocrystals within a Polyvinyl Butyral Laminate.

The energy required to heat, cool, and illuminate buildings continues to increase with growing urbanization, engendering a substantial global carbon footprint for the built environment. Passive modulation of the solar heat gain of buildings through the design of spectrally selective thermochromic fenestration elements holds promise for substantially alleviating energy consumed for climate control and lighting. The binary vanadium(IV) oxide VO2 manifests a robust metal-insulator transition that brings about a pronounced modulation of its near-infrared transmittance in response to thermal activation. As such, VO2 nanocrystals are potentially useful as the active elements of transparent thermochromic films and coatings. Practical applications in retrofitting existing buildings requires the design of workflows to embed thermochromic fillers within industrially viable resins. Here, we describe the dispersion of VO2 nanocrystals within a polyvinyl butyral laminate commonly used in the laminated glass industry as a result of its high optical clarity, toughness, ductility, and strong adhesion to glass. To form high-optical-clarity nanocomposite films, VO2 nanocrystals are encased in a silica shell and functionalized with 3-methacryloxypropyltrimethoxysilane, enabling excellent dispersion of the nanocrystals in PVB through the formation of siloxane linkages and miscibility of the methacrylate group with the random copolymer. Encapsulation, functionalization, and dispersion of the core-shell VO2@SiO2 nanocrystals mitigates both Mie scattering and light scattering from refractive index discontinuities. The nanocomposite laminates exhibit a 22.3% modulation of NIR transmittance with the functionalizing moiety engendering a 77% increase of visible light transmittance as compared to unfunctionalized core-shell particles. The functionalization scheme and workflow demonstrated, here, illustrates a viable approach for integrating thermochromic functionality within laminated glass used for retrofitting buildings.

Synthesis and characterization of SiO2-NiO xerogel nanocomposite prepared by sol–gel method for catalytic reduction of p-nitrophenol

This manuscript describes the preparation and characterization of silica-nickel oxide (SiO2-NiO) xerogel nanocomposite and its catalytic application in the hydrogenation of p-nitrophenol. Hydrochloric acid and ammonium hydroxide were used as the acid and base catalyst, respectively during the synthesis of SiO2-NiO. The Fourier Transformation Infra-Red spectroscopic results supported the formation of the silica xerogel skeleton structure with corresponding characteristic peaks of siloxane linkage. The surface of SiO2-NiO xerogel nanocomposite was observed to be porous along with some irregular cracks. The X-Ray diffraction analysis showed that the SiO2-NiO xerogel nanocomposite was amorphous in nature. The synthesized xerogel nanocomposite was employed as a catalyst for the hydrogenation of p-nitrophenol with sodium borohydride in water. The rate of hydrogenation of p-nitrophenol was observed to be increased with the increased amount of catalyst as well as the temperature. The maximum reduction rate of p-nitrophenol was found as high as 0.26 min-1.

Elongation improvement of transparent and flexible surface protective coating using polydimethylsiloxane-anchored epoxy-functionalized siloxane hybrid composite for reliable out-foldable displays

Flexible surface protective coating in out-foldable devices should possess high elongation with high surface hardness. However, the two characteristics in conventional protecting materials are mutually exclusive. Here, we report a simple and effective composite design strategy to realize high elastic, yet still hard out-foldable and transparent surface protective coating material using molecular hybridization between polydimethylsiloxane (PDMS) and epoxy-functionalized siloxane matrix (ESH) via an in situ sol-gel reaction, forming siloxane linkages. Chemically crosslinked PDMS with ESH (P-ESH) makes optical transparency and greatly improves the elongation property while retaining the surface hardness of ESH due to the flexible and long-siloxane backbone of PDMS. As a result, we obtain the high-performance surface protective coating with greatly improved elongation (2.05% of fracture strain, 60% increase of bare ESH) and high surface hardness (pencil hardness: 4H @ 20 μm thickness). We thoroughly characterize the mechanical behavior of P-ESH combined with microscopic (nano-scratch and nanoindentation tests) and macroscopic views (tensile test with digital image correlation methods). Enhanced elongation property with high surface hardness is induced by fully-recovery characteristics of P-ESH from external force. In addition, the fabricated P-ESH shows excellent reliability under repeated out-folding (5 mm of folding radius), continuous abrasion (steel wool test: 5,000 cycles), acid or base solutions, and ultraviolet irradiation. Our extensible transparent surface protective coating composite provides a great potential for application to next-generation out-foldable devices.

Cephradine drug release using electrospun chitosan nanofibers incorporated with halloysite nanoclay

Abstract The chitosan/polyvinyl alcohol/halloysite nanoclay (CS/PVA/HNC) loaded with cephradine drug electrospun nanofibers (NFs) were fabricated and characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) techniques. FTIR analysis confirmed the hydrogen bonding between the polymer chain and the developed siloxane linkages. SEM analysis revealed the formation of uniform NFs having beads free and smooth surface with an average diameter in 50–200 nm range. The thermal stability of the NFs was increased by increasing the HNC concentration. The antimicrobial activity was examined against Escherichia coli and staphylococcus strains and the NFs revealed auspicious antimicrobial potential. The drug release was studied at pH 7.4 (in PBS) at 37 °C. The drug release analysis showed that 90% of the drug was released from NFs in 2 h and 40 min. Hence, the prepared NFs could be used as a potential drug carrier and release in a control manner for biomedical application.

Controllable organosilane monolayer density of surface bonding using silatranes for thiol functionalization of silica particles for liquid chromatography and validation of microanalytical method for elemental composition determination

The present work systematically investigates a new strategy for the functionalization of silica gel using alkyl silatrane chemistry instead of alkylsilanes for synthesis of chromatographic stationary phases. In this work, silica was chemically modified for further functionalization by a thiol-ene click reaction. Thus, 3-mercaptopropylsilatrane (MPS) was used which is capable to form self-assembled monolayers (SAM) on top of silanol surfaces in a controlled manner as previously shown for silicon wafers. The utility of this chemistry for stationary phase synthesis in liquid chromatography was not evaluated yet. Hence, silica surface modifications using MPS were studied in comparison to established 3-mercaptopropyltrimethoxysilane (MPTMS) chemistry. First, the employed elemental analysis method was validated and it showed excellent intra-day and inter-day precisions (typically less than 5% RSD). It could be shown that the reaction kinetics of MPS was roughly 35-times faster than with MPTMS. After 30 min reaction time with MPS, the thiol content reached 74% of the maximal coverage. Due to controlled chemistry with MPS, which does not lead to oligomeric siloxane network at the silica surface, the ligand coverage was lower. However, multiple silanization cycles with MPS led to a dense surface coverage (around 4 µmol m−2). 29Si cross polarization/magic angle spinning (CP/MAS) solid-state NMR revealed distinct T1/T2/T3 ratios for MPS and MPTMS materials with up to 80% T3 (indicative for trifunctional siloxane linkage) for MPS and around 20% T3 for MPTMS. This indicates a more homogeneous, thinner monolayer film of MPS on the silica surface, as compared to an irregular thick oligomeric siloxane network with MPTMS. Bonding of quinine carbamate as chiral selector afforded an efficient chiral stationary phase (CSP) for chromatographic enantiomer separation. Separation factors were comparable to MPTMS-bonded CSP, however, chromatographic efficiency was much better for the MPS-bonded CSP. H/u curves indicated a reduced mass transfer resistance by roughly factor 3 for MPS- compared to MPTMS-bonded CSP. This confirms better chromatographic performance of surfaces with homogeneous monolayer compared to network structures on the silica surface which suffer from poor stationary phase mass transfer.

Siloxane Coordination Revisited: Si−O Bond Character, Reactivity and Magnificent Molecular Shapes

AbstractSiloxanes have evolved into a multi‐million dollar business due to their manifold of commercial and industrial applications. As siloxanes have high hydrophobicity, low basicity, high flexibility and also high chemical inertness in common, their chemistry differs significantly from that of organic ethers. The discovery of organic crown ethers, for instance, is commonly accepted as the birth of synthetic host‐guest chemistry. Regarding the chemical properties of siloxanes, cyclic siloxanes which formally resemble silicon analogues of crown ethers, have received considerably less interest in terms of their host‐guest chemistry. Hence, only little is known about siloxane coordination chemistry in the chemical community and the number of published works in this field has been very low till lately. In the last few years, the field has significantly advanced and elegant methods were established to enable the Si−O−Si unit for coordination. This review therefore summarizes the recent developments in the field, recapitulates the historical aspects of siloxane coordination chemistry and describes the specific Si−O bond character with regard to different siloxane linkages. Implications on Si−O bond activation are included and the limits of siloxane coordination are redefined.

Dual Temperature and Metal Salts-Responsive Interpenetrating Polymer Networks Composed of Poly (N-isopropylacrylamide) and Polyethylene Glycol.

Novel interpenetrating polymer networks (IPNs) composed of poly(N-isopropylacrylamide) (poly-NIPAM) and polyethers—namely, polyethylene glycol (PEG) and poly(tetramethylene oxide)—were synthesized in the absence and presence of polysiloxane containing a silanol residue. Gelation was accomplished using end-capped polyethers with trimethoxysilyl moieties and proceeded through simultaneous radical gelation of NIPAM and condensation of the silyl groups to form siloxane linkages. Thus, a novel one-step method constructing an IPN structure was provided. The obtained IPNs showed a gentle temperature-responsive volume change in water owing to the constructed poly-NIPAM gel component. In addition, a specific color-change response to chemical stimuli, such as CuCl2 and AgNO3 in water, was observed only when both components of poly-NIPAM and PEG existed in a gel form. For example, a single network gel composed of poly-NIPAM or PEG was isolated as a pale blue hydrogel, whereas IPNs composed of poly-NIPAM and PEG components turned yellow after swelling in an aqueous CuCl2 solution (0.1 M, pale blue). Dual-responsive functionalities of the synthesized hydrogels to temperature and metal salts, along with volume and color changes, were demonstrated.

Affixing poly(methyl methacrylate-co-acrylic acid) nanospheres with trimethoxyvinylsilane on silicon solar module to enhance its power conversion efficiency

Poly(methyl methacrylate-co-acrylic acid) [P(MMA-co-AA)] incorporated with 0–9 wt% of trimethoxyvinylsilane (TMVS) has been studied to investigate the effect of TMVS on the adhesion properties of P(MMA-co-AA) nanospheres coated on silicon substrate as well as on the power conversion efficiency (PCE) of silicon solar module coated with the polymer nanospheres. The incorporation of 7 and 9 wt% of TMVS into the copolymer has been found to render the copolymer stronger adhesion to glass substrate than the samples with lower amount of TMVS in them. The coating of the P(MMA-co-AA) nanospheres on the glass surface of solar module increases the light harvesting efficiency by serving as an anti-reflective layer. Solar module coated with an array of P(MMA-co-AA) nanospheres with 7 wt% of TMVS yielded the highest PCE enhancement of 98% under the illumination of an AM1.5 solar simulator. The natural weathering results indicate that the copolymer with 7% of TMVS was able to withstand prolonged natural weathering exposure and remained reasonably effective in PCE enhancement up to 130 days of outdoor exposure. This study demonstrates a cost-effective technique to bind [P(MMA-co-AA)] nanospheres onto the silicon surface of solar module via siloxane linkages and thus increases the PCE of the solar module effectively. The Tg of the copolymer increased linearly from 110.31 to 118.42 °C when 0–9 wt% of TMVS was added into it. Thermogravimetry results indicate that the incorporation of TMVS does not give any significant effect on the Td of the copolymer, which occurs at about 390 °C.

The use of Bis‐(3‐triethoxysilylpropyl) tetrasulphane for surface modification of silica, ferrite and kenaf fiber filled natural rubber composites; comparison of aqueous solvent deposition, dry blend and integral blend methods

AbstractIn this work, Bis‐(3‐triethoxysilylpropyl) tetrasulphane was employed for surface modification of silica, ferrite and kenaf fiber filled natural rubber composites using aqueous solvent deposition, dry blending and integral blend methods. The efficiency of each method and the preferred modification method for improving the mechanical performance of natural rubber composites was assessed. The appearance of the Fourier transform infrared spectroscopy peak around 1088 cm−1for all types of fillers provided evidence that silane interaction had occurred between the fillers and rubber and the formation of siloxane linkages were quantitatively determined by the crosslink density measurement. The surface treatment by dry method for silica and ferrite fillers showed significant improvement of tensile performance at approximately 67% and 34% compared to those with untreated fillers. For kenaf fiber‐filled rubber composites, the surface treatment by aqueous solvent deposition showed the highest tensile improvement of 59% compared to the dry blending and integral blend method.

Design of PEGylated Three Ligands Silica Nanoparticles for Multi-Receptor Targeting

The synthesis of silica nanoparticles (SiNPs) decorated on their surface with a range of various elements (e.g., ligands, drugs, fluorophores, vectors, etc.) in a controlled ratio remains a big challenge. We have previously developed an efficient strategy to obtain in one-step, well-defined multifunctional fluorescent SiNPs displaying fluorophores and two peptides ligands as targeting elements, allowing selective detection of cancer cells. In this paper, we demonstrate that additional level of controlled multifunctionality can be achieved, getting even closer to the original concept of “magic bullet”, using solely sol–gel chemistry to achieve conjugation of PEG chains for stealth, along with three different ligands. In addition, we have answered the recurrent question of the surface ungrafting by investigating the stability of different siloxane linkages with the ERETIC Method (Electronic Reference to Access In Vivo Concentrations) by 19F NMR quantification. We also compared the efficiency of the hybrid silylated fluorophore covalent linkage in the core of the SiNP to conventional methods. Finally, the tumor-cell-targeting efficiency of these multi-ligand NPs on human endothelial cells (HUVEC or HDMEC) and mixed spheroids of human melanoma cells and HUVEC displaying different types of receptors were evaluated in vitro.

Nanostructured silica particles from Cymbopogon flexuosus (Nees ex Steud.): extraction, characterization and study of their blend with osteoporotic drugs

Cymbopogon flexuosus (lemongrass) is one of the potential herbaceous sources for the extraction of silica. Silica plays a vital role in formation of bone and its maintenance by improving the quality of the bone matrix and facilitating bone mineralization. This work presents the extraction of silica nanoparticles from different parts of lemongrass such as root, stem and leaf. IR spectra of all the three extracts confirmed the presence of siloxane and silanol linkage. The SEM analysis revealed the SiNPs from root, stem and leaves to be aggregates of tubular, fibrous and spherical structures, respectively. Significant differences were observed in elemental composition of SiNPs as determined by EDAX. Optimization of the acid leaching process further enhanced the yield by around 30% from leaves. EDAX revealed significant differences in the elemental composition. The DLS histogram showed a size distribution of 62.4 nm validating Zetasizer evaluation having PdI of 0.127. The work also reports the screening of drugs through in silico approach wherein the drug risedronate showed ideal parameters satisfying the Lipinski’s rule of 5. Further, the cytotoxicity of SiNPs and SiNPs with risedronate (drug) was tested on HUVEC and Saos-2 cell lines. The SiNPs showed lesser IC50 value in comparison with risedronate and SiNPs with risedronate tested on both the cell lines. LDH assay elaborated prominent cell leakage by risedronate-anchored SiNPs which is found significant in comparison with bare SiNPs. Treatment of the osteoporotic cells with risedronate/silica blend (1:1000) revealed efficient deposition of calcium and drug in the cells as determined by microscopic observations. Drug release studies of SiNPs with risedronate were performed. FTIR indicated the presence of siloxane (Si–O–Si) and silanol (Si–OH) functional groups. In vitro study of different ratios of risedronate with silica on Saos-2 cell lines was performed to determine the mineralization potential of the combinatorial drug. It was found that the cells incubated with 0.6 mg/ml and 0.8 mg/ml of risedronate with silica showed efficient deposition of calcium inside the cells. The wild variety of Cymbopogon flexuosus could be a potential source for the extraction of SiNPs, which finds much use in biomedical applications.

Synergistic enhancement of UV-resistance and electrical conductivity of waterborne polyurethane composite with combination of functionalized 2D graphene oxide and 1D nanocellulose

In this work, a functionalized graphene oxide@functionalized nanocellulose (FGO@FNC) composite filler, that was firstly synthesized by using isocyanatopropyltriethoxysilane (IPTS) as a coupling agent through a sol-gel process, and subsequently incorporated into waterborne polyurethane (WPU) dispersion via a simple and scalable solution blending method to prepare WPU composite (WPU/FGO@FNC). It was found that for the as-prepared FGO@FNC filler, the urethane chains were covalently grafted onto the surface of 2D graphene oxide and 1D nanocellulose, as well as siloxane linkages were formed between FGO and FNC as a result of co-condensation. Notably, the inserted FGO@FNC filler, dispersing excellently within the WPU matrix, could reinforce mechanical properties, improve surface hydrophobicity and electrical conductivity of WPU/FGO@FNCs composites, and particularly enhance the UV-resistant performance. Furthermore, the most effective enhancement was acquired when 3 wt% of FGO@FNC was incorporated into the WPU matrix, i.e., the WPU/FGO@FNC3 composite, that showed surpassing mechanical properties (σb = 28.7 MPa, εb = 462.8 %), water contact angle (96.5°), and electrical conductivity (0.252 S/m); and more importantly, it retained considerably in physicochemical parameters nearly above 78 % after five days of UV exposure. This work offers a viable avenue for developing UV-resistant, electrical conductive, tough and hydrophobic multi-functional coatings.