{"title":"Bioinspired lipid coated porous particle as inhalable carrier with pulmonary surfactant adhesion and mucus penetration","authors":"Jesús E. Campos Pacheco , Angela Vitali , Peter Falkman , Aimar Marauri , Aurélie Marchès , Hadeel Al-Najjar , Adai Colom , Marité Cárdenas , Georgia A. Pilkington , Sabrina Valetti","doi":"10.1016/j.jcis.2025.137967","DOIUrl":"10.1016/j.jcis.2025.137967","url":null,"abstract":"<div><div>There is an urgent need for novel inhalable drug carriers to fight respiratory infections. Lipid-coated mesoporous silica particles (LC-MSPs) combine the biocompatibility of lipids with the aerosolization properties of micronized low-density MSPs. In this study, the abundant lung surfactant phospholipid dipalmitoylphosphatidylcholine (DPPC) was used to coat disordered MSPs by means of two methods: vesicle fusion (VF) and spray-drying (SD). FT-IR and TGA analyses indicated the presence of the lipid coating, while SEM images revealed spherical particles with a smooth, homogenous surface and no detectable lipid aggregates. Both the VF and SD methods resulted in full phospholipid coverage on the outer silica surface (>100 %). However, the VF method produced a more homogeneous coating across particles and achieved a higher lipid content compared to SD (7.0 vs 3.0 % w/w). The resulting LC-MSPs exhibited favorable aerosolization properties, enabling efficient pulmonary delivery of clofazimine, a lipophilic antitubercular drug. The DPPC coating promoted interaction with endogenous lung surfactant, which enhanced the dispersion of the particles in the alveolar environment and significantly increased drug dissolution (from 35 to 75 %). Lipid coating significantly enhances particle adhesion and penetration across the human bronchial mucus layer and into the underlying tissue. Overall, our study presents a refined formulation strategy using phospholipid-coated MSPs as a single-component dry powder carrier, offering targeted lung deposition, enhanced drug dissolution, mucoadhesion, and tissue penetration.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"697 ","pages":"Article 137967"},"PeriodicalIF":9.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Corrigendum to “Engineering small extracellular vesicles with multivalent DNA probes for precise tumor targeting and enhanced synergistic therapy” [J. Colloid Interface Sci. 679(Part A) (2025) 335–348]","authors":"Qi Zhang, Ruo-Fei Ma, Ting-Ju Ren, Xiu-Yan Ren, Zhang-Run Xu","doi":"10.1016/j.jcis.2025.137902","DOIUrl":"10.1016/j.jcis.2025.137902","url":null,"abstract":"","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"695 ","pages":"Article 137902"},"PeriodicalIF":9.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Double-layer structure and interfacial tension at an ionic surfactant-laden interface","authors":"Emerson M. Uhlig, Aditya S. Khair","doi":"10.1016/j.jcis.2025.137924","DOIUrl":"10.1016/j.jcis.2025.137924","url":null,"abstract":"<div><h3>Hypothesis</h3><div>The electrical double-layer structure at an ionic surfactant-laden interface is unique due to the nonlinear coupling of interfacial charging and adsorption kinetics. Consequently, the interfacial equation of state is nonideal even at low surfactant concentrations.</div></div><div><h3>Analysis and computations</h3><div>We analyze the equilibrium double-layer structure and interfacial tension of a planar interface that has a surface charge density derived from adsorbed ionic surfactants, as opposed to a surface whose charge or potential is specified <em>a priori</em>. Our analysis utilizes matched asymptotic expansions in the limit where the Debye length (<span><math><msup><mrow><mi>κ</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span>) is much smaller than the surfactant depletion length (<em>h</em>), i.e. <span><math><mi>ε</mi><mo>=</mo><mn>1</mn><mo>/</mo><mo>(</mo><mi>κ</mi><mi>h</mi><mo>)</mo><mo>≪</mo><mn>1</mn></math></span>. The asymptotic analysis is verified against numerical computations.</div></div><div><h3>Findings</h3><div>The interfacial concentration of surfactant is asymptotically small due to electrostatic repulsion, scaling as <span><math><msup><mrow><mi>ε</mi></mrow><mrow><mn>2</mn><mo>/</mo><mn>3</mn></mrow></msup><msub><mrow><mi>Γ</mi></mrow><mrow><mo>∞</mo></mrow></msub></math></span>, where <span><math><msub><mrow><mi>Γ</mi></mrow><mrow><mo>∞</mo></mrow></msub></math></span> is the maximum packing surface concentration. Moreover, the atypical double-layer structure consists of an inner layer of width <span><math><mi>O</mi><mo>(</mo><msup><mrow><mi>ε</mi></mrow><mrow><mn>4</mn><mo>/</mo><mn>3</mn></mrow></msup><mi>h</mi><mo>)</mo></math></span> within a Debye layer of width <span><math><mi>O</mi><mo>(</mo><mi>ε</mi><mi>h</mi><mo>)</mo></math></span>, outside of which is an electroneutral bulk solution of surfactant and counterions at uniform concentration <span><math><msub><mrow><mi>c</mi></mrow><mrow><mo>∞</mo></mrow></msub></math></span>. The surfactant and counterion concentrations in the inner layer scale as <span><math><mi>O</mi><mo>(</mo><msup><mrow><mi>ε</mi></mrow><mrow><mn>2</mn><mo>/</mo><mn>3</mn></mrow></msup><msub><mrow><mi>c</mi></mrow><mrow><mo>∞</mo></mrow></msub><mo>)</mo></math></span> and <span><math><mi>O</mi><mo>(</mo><msup><mrow><mi>ε</mi></mrow><mrow><mo>−</mo><mn>2</mn><mo>/</mo><mn>3</mn></mrow></msup><msub><mrow><mi>c</mi></mrow><mrow><mo>∞</mo></mrow></msub><mo>)</mo></math></span> respectively, whereas both are <span><math><mi>O</mi><mrow><mo>(</mo><msub><mrow><mi>c</mi></mrow><mrow><mo>∞</mo></mrow></msub><mo>)</mo></mrow></math></span> in the Debye layer. The interfacial tension is predicted to decrease from its clean value (i.e. in the absence of surfactant) as <span><math><mi>O</mi><mo>(</mo><msup><mrow><mi>ε</mi></mrow><mrow><mn>2</mn><mo>/</mo><mn>3</mn></mrow></msup><mo>)</mo></math></span>. This asymptotic prediction is in qualitative agreement wit","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"697 ","pages":"Article 137924"},"PeriodicalIF":9.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Li-Chao Jing , Wen-Hao Geng , Ze-Long Bao , Qinxing Xie , Di Zhang , Hong-Zhang Geng
{"title":"Nanoparticles with Core-Shell structure as efficient recoverable corrosion inhibitors for mild steel in acidic media","authors":"Li-Chao Jing , Wen-Hao Geng , Ze-Long Bao , Qinxing Xie , Di Zhang , Hong-Zhang Geng","doi":"10.1016/j.jcis.2025.137973","DOIUrl":"10.1016/j.jcis.2025.137973","url":null,"abstract":"<div><div>The challenge of mild steel corrosion under acidic conditions remains a critical challenge in industrial operations, necessitating the development of effective anti-corrosion technologies. To overcome this problem, there is an urgent need for efficient corrosion inhibitors. This research explored the corrosion inhibition ability of core–shell structured polydopamine (PDA)@silicon dioxide (SiO<sub>2</sub>)@Fe<sub>3</sub>O<sub>4</sub> magnetic nanoparticles (MNPs) for mild steel in 1 M HCl solution. Weight loss measurements demonstrated PDA@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> MNPs achieved a 96.57 % inhibition efficiency, with 88.09 % efficiency retained after recycling. Electrochemical analysis confirmed its mixed-type inhibition mechanism, suppressing both anodic and cathodic reactions. The adsorption behavior of the inhibitor followed the Redlich-Peterson (R-P) isotherm model, indicating a hybrid interaction mechanism involving both physical adsorption and chemical bonding between the MNPs and the mild steel surface. Comprehensive analysis revealed that the PDA and SiO<sub>2</sub> layers effectively protected the magnetic Fe<sub>3</sub>O<sub>4</sub> core, allowing the PDA@SiO<sub>2</sub>@Fe<sub>3</sub>O<sub>4</sub> MNPs to remain stable in the HCl solution while exhibiting enhanced corrosion inhibition performance. This research presents a novel strategy for developing recyclable nano-corrosion inhibitors suitable for acidic conditions.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"698 ","pages":"Article 137973"},"PeriodicalIF":9.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shuhao Qin , Kang Li , Ting Lei , Yufei Liu , Huiju Shao
{"title":"Multifunctional polysulfone composite membranes via constructing electrically conductive gradient and magnetic-core/electric-shell dual-gradient microstructures: A strategy to tackle multiple hazards","authors":"Shuhao Qin , Kang Li , Ting Lei , Yufei Liu , Huiju Shao","doi":"10.1016/j.jcis.2025.137966","DOIUrl":"10.1016/j.jcis.2025.137966","url":null,"abstract":"<div><div>The rapid advancement of industries and technologies leads to the emergence of new pollutants such as dyeing wastewater and electromagnetic interference (EMI), and their efficient treatment poses great challenges for traditional materials and methods. Herein, a novel electrically conductive membrane (ECM) was fabricated on a large scale through the electric field-assisted membrane formation. Carbon nanotubes (CNTs) and carbon black (CB) were uniformly dispersed in dope solution by strong hydrogen bonding with suitable polyvinylpyrrolidone (PVP) molecules. They moved towards the coating layer upper surface under an electric field, forming electrically conductive gradient microstructures. Subsequently, a stable electrically conductive skin layer was generated due to the excellent film-forming ability of PVP, which hindered the loss of CNTs and CB into coagulating bath. The optimized membrane possessed a high electrical conductivity of 34.3 ± 0.7 S/m, and exhibited superior permeate fluxes (>515.6 L/m<sup>2</sup> h·bar), dye rejections (>87.1 %) and flux recovery ratios (>91.5 %) in the electric-assisted filtration. Moreover, magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles were incorporated on the bottom surface and inside the pores by vacuum filtration, yielding an innovative magnetic-core/electric-shell dual-gradient microstructure. Electromagnetic wave went through an “absorption-multiple reflection/absorption-strong reflection-reabsorption/multiple reflection” process within the membrane, and then was consumed through the superposition of magnetic loss, polarization loss and conducting loss. Accordingly, the membrane displayed an EMI shielding efficiency of 23.6 ± 0.5 dB with a thickness of 0.2 mm at a low CB-CNTs loading of 20 wt%. This work provides a strategic framework for designing adaptable multifunctional membranes, bridging critical applications from wastewater remediation to next-generation electronic shielding technologies.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"697 ","pages":"Article 137966"},"PeriodicalIF":9.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yi Wen, Chenguang Qian, Bowen Cui, Boxuan Tian, Chunquan Li, Hang Li, Fang Yuan, Zhiming Sun
{"title":"In-situ directional growth of NH2-MIL-125(Ti) induced by diatomite enhances the quantum efficiency of CO2 photoreduction with water vapor","authors":"Yi Wen, Chenguang Qian, Bowen Cui, Boxuan Tian, Chunquan Li, Hang Li, Fang Yuan, Zhiming Sun","doi":"10.1016/j.jcis.2025.137970","DOIUrl":"10.1016/j.jcis.2025.137970","url":null,"abstract":"<div><div>Photocatalytic CO<sub>2</sub> reduction harnesses sunlight to convert CO<sub>2</sub> into fuels (e.g., CO, CH<sub>4</sub>) to address global warming and energy shortages, but faces challenges like high cost and low efficiency. In this work, NH<sub>2</sub>-MIL-125(Ti)/diatomite composites were prepared by one-step solvothermal method using diatomite as a support. Characterization indicated that NH<sub>2</sub>-MIL-125(Ti) units were grown in-situ on diatomite through surface-mediated interactions with Si-O-Ti bonds. This process significantly reduced the agglomeration of NH<sub>2</sub>-MIL-125 particles. Among the resulting composites, NH<sub>2</sub>-MIL-125/DE-60 % had the best photocatalytic activity with a CO production rate of 7.36 μmol g<sup>−1</sup> h<sup>−1</sup>, which is 1.56 times higher than NH<sub>2</sub>-MIL-125. In four cycles, the yield remained above 6.88 μmol g<sup>−1</sup> h<sup>−1</sup>. Meanwhile, electrochemical characterization revealed that composite enhances the separation efficiency of photogenerated carriers and reduces carrier migration resistance. The excellent performance of NH<sub>2</sub>-MIL-125/diatomite composites could be attributed to the synergistic effects of its better dispersion and the Si-O-Ti interface formation, which improve light absorption, increase the number of active sites and facilitate charge separation. Meanwhile, the specific mechanism of CO<sub>2</sub> reduction by NH<sub>2</sub>-MIL-125/diatomite composites and its reduction pathway were also revealed. In conclusion, this study successfully reduced the agglomeration effect of MOFs, and provided implications for realizing in-situ growth of MOFs on mineral surfaces.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"697 ","pages":"Article 137970"},"PeriodicalIF":9.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kesong Wang , Tingting Chen , Jun Zhang , Zhen Zhang , Noureddine Abidi
{"title":"One stone, two birds: Multifunctional composites for bifacial solar photovoltaic power generation with enhanced flame retardancy and smoke suppression","authors":"Kesong Wang , Tingting Chen , Jun Zhang , Zhen Zhang , Noureddine Abidi","doi":"10.1016/j.jcis.2025.137974","DOIUrl":"10.1016/j.jcis.2025.137974","url":null,"abstract":"<div><div>Solar photovoltaics (PV) convert sunlight into electricity, with bifacial systems capturing light on both sides to enhance efficiency. Incorporating materials with high reflectivity in the 300–1100 nm wavelength range can further boost this efficiency by redirecting unutilized light to the rear of bifacial PV modules. In this work, a multifunctional composite material was developed by incorporating nano titanium dioxide (TiO<sub>2</sub>) and magnesium hydroxide (Mg(OH)<sub>2</sub>) into a polyethylene (PE) matrix. This composite system exhibits high reflectivity in the 300–1100 nm range, with the addition of 10 phr nano TiO<sub>2</sub> and 150 phr Mg(OH)<sub>2</sub> increasing the reflectivity to 76.39 %, enhancing solar energy utilization. Additionally, the composite showed enhanced flame retardancy, with the limiting oxygen index rising from 17.8 % to 28.0 %, a UL-94 rating improvement from “No Rating” to V-0, and significantly reduced smoke density, approaching zero compared to the control. Its thermal conductivity of 1.13 W·m<sup>−1</sup>·K<sup>−1</sup> makes it suitable for passive cooling applications in building facades and automotive interiors. These combined properties make the composite a promising candidate for enhancing efficiency and safety in bifacial PV systems.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"697 ","pages":"Article 137974"},"PeriodicalIF":9.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dongdong Wang , Qiong Wu , Longfei Tan , Changhui Fu , Xiangling Ren , Zengzhen Chen , Xiaowei Chen , Xianwei Meng
{"title":"Tumor microenvironment-responsive nanoregulator CoMnMOF superparticles for enhanced microwave dynamic therapy via multi-pronged amplification of reactive oxygen species","authors":"Dongdong Wang , Qiong Wu , Longfei Tan , Changhui Fu , Xiangling Ren , Zengzhen Chen , Xiaowei Chen , Xianwei Meng","doi":"10.1016/j.jcis.2025.137963","DOIUrl":"10.1016/j.jcis.2025.137963","url":null,"abstract":"<div><div>Microwave dynamic therapy (MDT) is promising in tumor therapy by generation of toxic reactive oxygen species (ROS), whose therapeutic efficacy is severely compromised by hypoxia and the antioxidant defense in the tumor microenvironment (TME). To address these bottlenecks, we designed a multifunctional nanoregulator CoMnMOF@Apatinib@<span>l</span>-menthol@RBC-HA (denoted as CMALRH) to achieve enhanced MDT via a multi-pronged ROS amplification strategy. We demonstrated that the enhanced ROS generation is attributed to the up-regulate O<sub>2</sub> level, down-regulate vascular endothelial growth factor (VEGF) expression and deplete glutathione (GSH). Meanwhile, CMALRH is verified to perform superior microwave (MW) thermal effect, thus remarkably potentiating the efficacy of anti-tumor therapy. The experiments <em>in vitro</em> and <em>in vivo</em> confirmed the enhanced MDT in combination with microwave thermal therapy can successfully inhibit the proliferation of breast cancer. This TME based ROS amplification strategy provides an avenue for the development of remarkably high efficiency MDT and MW thermal therapy.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"697 ","pages":"Article 137963"},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Tailoring the coordination microenvironment of electrospun nanofibers for the separation of thorium ions from ore wastewater","authors":"Zixu Ren , Dingyang Chen , Minsi Shi, Rui Zhao","doi":"10.1016/j.jcis.2025.137957","DOIUrl":"10.1016/j.jcis.2025.137957","url":null,"abstract":"<div><div>Confronted with the intricate presence of multiple metal ions in thorium mineral wastewater, electrospun nanofibers characterized by high porosity and easy functionalization are anticipated to emerge as distinctive adsorbents for the efficient and selective removal of thorium ions from water. Herein, the coordination microenvironment of electrospun nanofibers was tailored by the hyperbranched grafting and introduction of salicylaldehyde based groups, which displayed high affinity and selectivity toward Th(IV) ions. The obtained electrospun nanofibers showed fast adsorption kinetics of 60 min and high uptake capacity of 781.3 mg g<sup>−1</sup>, which were superior to most of shapeable adsorbents and comparable to many powder adsorbents. The nanofiber adsorbent also exhibited a high distribution coefficient (<em>K</em><sub>d</sub>) of 3.1 × 10<sup>5</sup> mL g<sup>−1</sup> and good anti-interference ability against rare earth ions and uranyl ion. Based on the experimental characterizations and theoretical calculations, the grafted plenty of hydroxyl and Schiff base groups played the major role in achieving strong and selective Th(IV) ion binding. In addition, the macroscopical membrane morphology could effectively separate Th(IV) ions from water via dynamic filtration with a treatment volume 996 times its own membrane volume. This study not only offers new materials as efficient Th(IV) adsorbents but also provides a potential strategy for the recovery of nuclear fuel from wastewater.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"697 ","pages":"Article 137957"},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yinan Nie , Yang Hu , Nan Xin, Yifei Li, Xin Zhao, Min Zhang, Guihua Tang
{"title":"Cost-effective graphite aerogel for high-temperature thermoelectrics: Synergizing ultra-high electrical conductivity and thermal insulation","authors":"Yinan Nie , Yang Hu , Nan Xin, Yifei Li, Xin Zhao, Min Zhang, Guihua Tang","doi":"10.1016/j.jcis.2025.137926","DOIUrl":"10.1016/j.jcis.2025.137926","url":null,"abstract":"<div><div>High temperature exposure is commonly encountered in aerospace and industry, necessitating materials capable of providing both thermal insulation and thermal energy conversion. However, current thermoelectric aerogels often face dual challenges of constrained application temperatures (300–400 K) and prohibitively high costs due to substrate material limitations. In this study, a cost-effective graphite aerogel was fabricated using the directional freeze-drying method for integrated thermal insulation-thermoelectric applications across a wide temperature range. A pioneering Voronoi diagram-based electrical conductivity model featuring fractal lamellar structures was proposed with below 5% deviation between simulation and experimental data, which enables analysis of electrical transport properties under different densities of the lamellar structure, providing in-depth mechanism analysis of the interplay between microstructure and thermoelectric performance. By modulating the oriented lamellar skeletal structure, this aerogel achieved an efficient electrical carrier transportation of 48.28 S·cm<sup>−1</sup> and an effective suppression of thermal conductivity to 0.585 W·m<sup>−1</sup>·K<sup>−1</sup> at 923 K. Remarkably, the aerogel exhibits a 2–3 orders of magnitude enhancement in cost-normalized electrical conductivity over current-generation thermoelectric aerogels. Due to the band degeneracy effect, the Seebeck coefficient shows a significant increase when the temperature exceeds 773 K and reaches 96.84 μV·K<sup>−1</sup> at 923 K. The hierarchically structured graphite aerogel exhibits exceptional high-temperature thermoelectric performance with a peak ZT value of 0.036, creating an innovative framework for high-temperature thermal management and energy conversion in extreme environments.</div></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"697 ","pages":"Article 137926"},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}