Colloid and Interface Science Communications最新文献

Rosin thiourea imidazole quaternary ammonium salt (RTIQAs) was synthesized by connecting rosin and imidazole units via thiourea linker, and its inhibitive action on the corrosion of CRS (cold rolled steel) in 1.0 M HCl solution was fully investigated. The results demonstrate that RTIQAs is an efficient mixed-type inhibitor with the maximum inhibition efficiency of 95%. The adsorption rule on the CRS surface fully complies with Langmuir isotherm. The efficient inhibition of RTIQAs can also be verified by AFM, SEM and CLSM (confocal laser scanning microscope). The direct adsorption proof of RTIQAs molecules on steel surface can be further presented in EDX and XPS.

Boron nitride nanosheets (BNNSs) with high thermal conductivity (TC) have promising applications in the thermal conduction. However, the preparation of BNNSs is cumbersome and BNNSs are prone to aggregation in the polymer matrix, which reduces the efficient enhancement for the TC of BNNSs/polymer composite. Herein, we propose a one-step method for the simultaneous exfoliation and functionalization of BNNSs with polymer latex as an agent. The obtained WPU-BNNSs displayed as few-layers with sizes of 100-500 nm and were mixed with WPU matrix as filler. The results demonstrated that the BNNSs/WPU composites have higher TC than the h-BN/WPU with the same filler content. When the filler content reached 50%, its TC was 251.4% higher than that of pure WPU. The excellent TC arose from the outstanding dispersion uniformity of WPU-BNNSs in the matrix. This study provides an economical and efficient method of fabricating BNNSs-based thermal conductive composite materials.

Biosensors based on electrospun nanofibers have found extensive applications in the field of biomarker detection. Nanofibers, owing to their advantages such as porosity, high surface area, and significant loading capacity, play a crucial role in immobilizing recognition elements, directly interacting with target analytes, enhancing antibody fixation positions, and improving the activity and lifespan of biomolecules. This, in turn, enables the high sensitivity and selectivity detection of major disease biomarkers. This review begins by summarizing the structure and processing methods of electrospun nanofiber biosensors, followed by an overview of the physical, chemical detection, and immobilization patterns in biomarker detection. Subsequently, a brief retrospective analysis of the research progress in biomarker detection is presented. Additionally, the application of electrospun nanofiber biosensors in various disease areas, including cancer, cardiovascular, neurological, metabolic, and infectious diseases, is discussed based on biomedical classifications. Finally, the challenges faced by electrospun nanofiber biosensors in biomarker detection are summarized, and the future directions for the development of electrospun nanofiber biosensors are highlighted

The Chlorella cells exhibit excellent application potential in the field of environmental governance and bioenergy development. By selecting a bionic coating on the cell surface, it is possible to significantly enhance the cells' viability and stability within polluted environments. In this study, we employed catechol to induce the native Chlorella cells and Tannic acid (TA)-Fe³⁺@laccase coated cells to produce hydrogen. This protective coating effectively shielded the cells from external stressors, enhancing their tolerance in alkaline environments and higher substrate concentrations, ensuring long-term stable hydrogen production, achieving a 1.7-fold increase compared to the native cell hydrogen production in 7 days (Optical density, OD₇₅₀ = 2.5). Meanwhile, the degradation rate of catechol and the accumulation of biomass were also improved, and the accumulation of biomass increased by 8%. This strategy is expected to provide new solutions and possibilities for utilizing environmental pollutants to produce clean energy.

Myocardial infarction (MI) is a typical cardiovascular disease, causing disability and death worldwide. Exosomes secreted by mesenchymal stem cells (MSCs) showed remarkable therapeutic effects in MI by restoring cardiac function. However, the application of exosomes remains a challenge because of their low residence rate in the infarcted myocardium. Herein, a fibrin-based cardiac patch was prepared to deliver MSCs-derived exosomes to the infarcted heart using an MI mouse model, aiming at improvement of cardiac functions. The fibrin patch was optimized for size to minimize the mouse mortality rate. The composite patch showed sustained release of exosomes in vitro and could improve the retention of exosomes in the infarcted heart, inhibiting fibrosis and improving cardiac functions in vivo. Therefore, this combination of natural biomaterial-based cardiac patch and MSCs-derived exosomes may have a promising clinical translational potential for the MI treatment.

With the ongoing advancement of processing technology, one of the hottest subjects is the manufacturing of materials with distinctive surface micro/nanostructures. Among these, femtosecond laser processing has been widely adopted as a high-precision and high-efficiency fabricating technology. When compared to other traditional processing methods, femtosecond laser processing has some advantages in controllable micro/nanostructures processing and can fabricate a wide range of structures, including periodic structures, microporous array structure, three-dimensional structure, composite structures, and so on. They have many applications, including optical anti-counterfeiting, anti-reflection, superhydrophobic and superhydrophilic properties, and so on. This article reviews the simplified mechanism of femtosecond laser processing material, typical surface micro/nanostructures fabricated by femtosecond laser, and typical applications of femtosecond laser-fabricated surface micro/nanostructures. It proves the technical prospect and application potential of femtosecond laser fabrication of surface micro/nanostructures.

Promoting wound repair by external electric field is a proved effective adjuvant but with single effect and needs additional devices. We designed a MXene (Ti₃C₂T_x)-dominated electroactive nanoplatform (named as PM) which could respond to the natural physiological electric signals in the wound site and convert them into microcurrents of multi-intensity. MXene optimized the electrical properties of nanoplatform with charged surface, superior electrical conductivity and permittivity. In vitro studies have demonstrated that PM promotes the activity of functional cells associated with wound repair. In vivo results displayed its promotion equivalent to the applied electric field on both skin and oral mucosal wounds repair by accelerating collagen formation, vascularization and re-epithelization. It was the first time for biomaterials to response to and regulate bio-electric stimulation without external power source, making use of electric signals from the wound itself. This microenvironment-responsive PM with multifunctionality is a promising curative design for maxillofacial soft tissues defects repair.

Photothermal therapy (PTT) combined with chemotherapy has been highly desirable to improve the tumor treatment efficacy. Here, we report a novel controlled release nano-carrier system named Se-PEG-Au NPs-DOX (SePAD) for achieving chemo-photothermal synergistic tumor therapy. In this system, the diselenide-containing co-polymers (mPEG-Se–Se-PEGm) were anchored onto the surface of Au NPs via AuSe interactions and the soluble chemotherapeutic doxorubicin (Dox) was loaded into the monolayers. This structure is proved to be stable in a high biological thiols environment. Strikingly, the SePAD presents an ideal efficient photothermal capability and a controllable Dox release behavior by dynamic AuSe interaction in GSH-rich tumor cells when irradiated under 808 nm NIR laser. Following, the results of in vitro and in vivo experiments all demonstrat the superior antitumor properties of SePAD in murine breast cancer. Thus, this system provides a promising strategy to realize chemo-photothermal synergistic combination therapy for breast tumors.

Photothermal therapy (PTT) is an innovative and minimally invasive approach to cancer treatment, which uses photothermal agents to absorb light energy and convert it to heat, causing irreversible cellular damage and tumor cell death. Although current photothermal agents like indocyanine green (ICG), gold nanoparticles, and carbon-based materials have been used, they present challenges in terms of photostability, rapid elimination, and potential toxicity.

Hemoglobin, a protein found in red blood cells with light absorption and heat conversion properties, has emerged as a potential alternative. In particular, the high concentration of hemoglobin in fixed blood clots, unlike the hemoglobin in fluid blood, can induce an effective photothermal effect. NaOH can be injected into tumors to induce necrosis and promote blood coagulation via strong alkalinization. However, NaOH, being a highly alkaline substance, is rapidly absorbed when administered systemically and can increase systemic pH, leading to toxicity.

To address this, a needle-type sodium hydroxide (NaOH)-loaded starch (NST) implants was developed for the targeted delivery of NaOH directly to the tumor site. The NST implant, prepared by loading NaOH into a starch implant and drying, promotes localized tissue necrosis and subsequent blood clotting at the injection site, while ensuring controlled release of NaOH to reduce toxicity. In contrast to NaOH solution, the NST implant did not exhibit systemic toxicity upon administration and effectively induced thrombosis at the injection site.

Upon laser irradiation of the induced blood clot, the NST implant demonstrated a significant photothermal effect, exceeding 60 °C, and exhibited potent anticancer properties. Consequently, this novel method leverages the photothermal properties of endogenous hemoglobin within induced blood clots for effective tumor treatment. The NST implant approach shows potential as a biodegradable, efficient, and safe PTT method, offering a promising alternative to traditional photothermal agents.

Microbially influenced corrosion (MIC) of metals exerts a negative effect on the marine environment and causes a great loss of marine facilities. Corrosion prevention in an eco-friendly and sustainable way is a difficult problem to address, especially in the marine environment. In this work, Nocardiopsis dassonville, a corrosive bacteria isolated from the South China Sea was studied by using carbon steel. The results indicate that N. dassonville caused a corrosion loss of 7.68 mg cm⁻² and a corrosion pit of 13.0 μm on the carbon steel surface, but the corrosion is inhibited in the presence of Vibrio sp. EF187016 in the medium. Vibrio sp. EF187016 preferentially occupied the carbon steel surface, forming a protective biofilm that hindered the attachment of N. dassonville. In addition, extracellular polymeric substances extracted from Vibrio sp. EF187016 was added to N. dassonvillei inoculated medium and showed a significant inhibition of MIC on carbon steel.