Multi-dimensional Nanomaterials Research Articles

Multidimensional nanomaterials synergistic polyimide nanofiber/MXene/NiFe2O4 hybrid aerogel for high-performance microwave absorption

Microwave absorption materials are urgently demanded to control the increasing electromagnetic radiation pollution, but it remains a great challenge to achieve high-performance absorption through ingenious structure design and reasonable multicomponent strategy. Herein, a three-dimensional (3D) hybrid aerogel constructed from multidimensional nanomaterials was fabricated via freeze-drying method followed by heating treatment process. Therein, 2D Ti3C2Tx MXene nanosheets and 0D NiFe2O4 nanoparticles act as the electrical-magnetic skeleton of aerogel, while 1D polyimide nanofibers and polydimethylsiloxane as internal supporting parts and external crosslinker, respectively. The macroscopic interconnected porous structure coupled with the microscopic multiphase heterointerfaces are beneficial to forming the perfect impedance matching and superior dielectric/magnetic synergistic loss effects. Thus, the microwave absorption performance of this hybrid aerogel achieves thin thickness (1.5 mm), light weight (∼9.6 mg/cm3), wide effective absorption bandwidth (−6.24 GHz), and strong absorption (minimum reflection loss of −64.87 dB, 99.99996% microwave absorption) features. Besides, this aerogel also exhibits exceptional structural robustness and mechanical properties, as well as good hydrophobicity and thermal insulation characteristics, which ensure its stable and durable microwave absorption application in complex environments. This study effectively integrates multidimensional nanomaterials into a host–guest aerogel system, providing a valuable strategy for constructing high-performance microwave absorption materials.

Solvent-Evaporation-Induced Synthesis of Graphene Oxide/Peptide Nanofiber (GO/PNF) Hybrid Membranes Doped with Silver Nanoparticles for Antibacterial Application

Designing functional membranes through the collaboration of multi-dimensional nanomaterials is of particular interest in environmental and biomedical applications. Herein, we propose a facile and green synthetic strategy by collaborating with graphene oxide (GO), peptides, and silver nanoparticles (AgNPs) to synthesize functional hybrid membranes with favourable antibacterial effects. GO nanosheets are functionalized with self-assembled peptide nanofibers (PNFs) to form GO/PNFs nanohybrids, in which the PNFs not only improve the biocompatibility and dispersity of GO, but also provide more active sites for growing and anchoring AgNPs. As a result, multifunctional GO/PNFs/AgNP hybrid membranes with adjustable thickness and AgNP density are prepared via the solvent evaporation technique. The structural morphology of the as-prepared membranes is characterized using scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy, and their properties are analyzed by spectral methods. The hybrid membranes are then subjected to antibacterial experiments and their excellent antibacterial performances are demonstrated.

Modification of Liquid Separation Membranes Using Multidimensional Nanomaterials: Revealing the Roles of Dimension Based on Classical Titanium Dioxide.

Membrane technology has become increasingly popular and important for separation processes in industries, as well as for desalination and wastewater treatment. Over the last decade, the merger of nanotechnology and membrane technology in the development of nanocomposite membranes has emerged as a rapidly expanding research area. The key motivation driving the development of nanocomposite membranes is the pursuit of high-performance liquid separation membranes that can address the bottlenecks of conventionally used polymeric membranes. Nanostructured materials in the form of zero to three-dimensions exhibit unique dimension-dependent morphology and topology that have triggered considerable attention in various fields. While the surface hydrophilicity, antibacterial, and photocatalytic properties of TiO2 are particularly attractive for liquid separation membranes, the geometry-dependent properties of the nanocomposite membrane can be further fine-tuned by selecting the nanostructures with the right dimension. This review aims to provide an overview and comments on the state-of-the-art modifications of liquid separation membrane using TiO2 as a classical example of multidimensional nanomaterials. The performances of TiO2-incorporated nanocomposite membranes are discussed with attention placed on the special features rendered by their structures and dimensions. The innovations and breakthroughs made in the synthesis and modifications of structure-controlled TiO2 and its composites have enabled fascinating and advantageous properties for the development of high-performance nanocomposite membranes for liquid separation.

Multi-dimensional Ni(OH)2/(Ni(OH)2(NiOOH).167).857@Ni3S2 hierarchical structure for high-performance asymmetric supercapacitor

Multi-phase composite with multi-dimensional nano-structure is proved to have a more optimized electronic structure and abundant reactive active sites, which can effectively enhance the electrochemical behavior of the material. Herein, a three-phase hierarchical nanostructure electrode, Ni(OH)2/(Ni(OH)2(NiOOH).167).857@Ni3S2 (Ni(O)OH@Ni3S2), composed of 3-dimension (3D) Ni3S2 particles coated on the surface of the interlaced 1-dimension (1D) nanowires and 2-dimension (2D) nanosheets Ni(O)OH array, is successfully designed and constructed by a facile one-pot hydrothermal strategy. The formation mechanism is discussed by exploring the effect of S element content and hydrothermal time on the products. Benefiting from the synergistic effect between multi-dimensional nanomaterials, the Ni(O)OH@Ni3S2-1.0 composite electrode can deliver a high areal capacitance (11.74F cm−2 at 2 mA cm−2), displaying remarkable electrochemical behavior. In addition, the assembled Ni(O)OH@Ni3S2//AC asymmetric supercapacitor exhibits an areal energy density of 0.632 mWh cm−2 and an excellent cycling stability performance of 86.4 % after 6000 cycles at 100 mA cm−2. This work proposes the possibility and effectiveness of a one-step method to fabricate multi-dimensional and multi-phase composites for high-performance energy storage devices.

Intermetallic Nanoarchitectures for Efficient Electrocatalysis.

Intermetallic structures whose regular atomic arrays of constituent elements present unique catalytic properties have attracted considerable attention as efficient electrocatalysts for energy conversion reactions. Further performance enhancement in intermetallic catalysts hinges on constructing catalytic surfaces possessing high activity, durability, and selectivity. In this Perspective, we introduce recent endeavors to boost the performance of intermetallic catalysts by generating nanoarchitectures, which have well-defined size, shape, and dimension. We discuss the beneficial effects of nanoarchitectures compared with simple nanoparticles in catalysis. We highlight that the nanoarchitectures have high intrinsic activity owing to their inherent structural factors, including controlled facets, surface defects, strained surfaces, nanoscale confinement effects, and a high density of active sites. We next present notable examples of intermetallic nanoarchitectures, namely, facet-controlled intermetallic nanocrystals and multidimensional nanomaterials. Finally, we suggest the future research directions of intermetallic nanoarchitectures.

Optical Absorption in N-Dimensional Colloidal Quantum Dot Arrays: Influence of Stoichiometry and Applications in Intermediate Band Solar Cells.

We present a theoretical atomistic study of the optical properties of non-toxic InX (X = P, As, Sb) colloidal quantum dot arrays for application in photovoltaics. We focus on the electronic structure and optical absorption and on their dependence on array dimensionality and surface stoichiometry motivated by the rapid development of experimental techniques to achieve high periodicity and colloidal quantum dot characteristics. The homogeneous response of colloidal quantum dot arrays to different light polarizations is also investigated. Our results shed light on the optical behaviour of these novel multi-dimensional nanomaterials and identify some of them as ideal building blocks for intermediate band solar cells.

Resistance to Aging of Asphalt Modified with Multidimensional Nanomaterials: A literary Review

Multidimensional nanomaterials, is a resource that has been formed over time becoming a revolutionary technology with a transcendent character providing the use in asphalt construction procedures, benefiting in the aspects of resistance in the environments to the field of civil engineering, in the same way it is a way in the advance for a better conservation of horizontal works with a favorable impact on the materials used, helping to preserve the care of the environment. In such a way that, in this article, a systematic review is reflected, around the exhaustive research in the databases such as Scopus and Science Direct, compiling a sum of 85 articles, which are indexed in journals from 2017 to 2021, carried out correspondingly on the different investigations of the management of multidimensional nanomaterials in asphalts. The objective of this literary review is to transmit various research by authors such as: the impact on the life cycle of asphalt, the performance it produces, the profitability and the advantage of the teaching that multidimensional nanomaterials have left, to later show results that show a growth in yields in asphalts through the application of multidimensional nanomaterials, So that it presents greater efficiency in the resistance to aging of the asphalt it is concluded that the nanomaterials reduce the environmental impact caused by the field of the constructions, improving the anti-aging capacity of the asphalt.

Important contributions of multidimensional nanoadditives on the tribofilms: From formation mechanism to tribological behaviors

Nanomaterials have garnered significant interests owing to their attractive tribological potentials. Although numerous investigations pertaining to nano-reinforced composites have been conducted, the critical interactions between multidimensional nanoadditives and tribofilms are yet to be reviewed comprehensively. This review critically examines the current state of multidimensional nanomaterials that serve as functional additives in tribology. After brief discussion on major characteristics of multidimensional nanoadditives, the formation mechanisms of a tribofilm under the solid/liquid lubrication states are elaborated, and the functions of multidimensional nanoadditives are discussed. Additionally, concise conclusions regarding the formation mechanism and influencing factors of nano-tribofilms under solid/liquid lubrications are provided. The current challenges and prospects are presented such that the understanding of nano-tribology can be further intensified and their practical applications diversified.

Aging Resistances Evaluation of Multi-dimensional Nanomaterials Modified Asphalt by Characterizing Binders Recovered from Aged Asphalt Mixtures

Abstract In terms of the aging susceptibility of asphalt, the multi-dimensional nanomaterials (MDNMs) have been developed to improve the aging resistance of asphalt. In comparison with most of previous studies that are only based on asphalt binder aging simulation methods to evaluate anti-aging properties of MDNMs modified asphalt, aging resistances of MDNM-modified asphalt were evaluated in this research by extracting and recovering binders from their aged asphalt mixtures and then characterizing the aging degree of the extracted binders in terms of physical, rheological, and chemical properties. Organic expanded vermiculite (OEVMT) and nanoparticles (nano zinc oxide [ZnO], nano titanium dioxide [TiO2], and nano silica [SiO2]) were chosen to compose three kinds of MDNMs. And six types of aging patterns (including mixing aging [MA], short-term aging [STA], compacted and loose long-term aging [CLTA and LLTA], and compacted and loose ultraviolet (UV) aging [CUVA and LUVA]) for asphalt mixtures were conducted. The results indicate that the ranking of aging degree for the six types of aging patterns is LUVA > LLTA > CUVA > CLTA > STA > MA. Regardless of the types of asphalt mixture aging patterns, the aging resistances of extracted MDNM-modified asphalt binders are all better than extracted pure asphalt binder, and the composite form of OEVMT combined with ZnO presents more significant improvements on asphalt aging resistance than the other two composite forms (OEVMT + SiO2 and OEVMT + TiO2).

Research on the anti-aging mechanism of SBS-modified asphalt compounded with multidimensional nanomaterials based on atomic force microscopy

Styrene-butadiene-styrene (SBS)-modified asphalt binders age during road service, affecting the road performance. To improve the anti-aging performance of SBS-modified asphalt, layered silicates (organically expanded vermiculite (OEVMT) and organic montmorillonite (OMMT)), which can reduce the oxidation behavior of asphalt, and nanometer-scale titania (nano-TiO2), which has good anti-ultraviolet aging properties, were selected for the preparation of composite modifiers due to their properties. The composite modifiers are multidimensional nanomaterials, OEVMT/TiO2 and OMMT/TiO2. The asphalt samples were aged by a thin film oven (TFOT) test, pressure aging vessel (PAV) test, and ultraviolet aging test. Through physical performance tests, rheological performance tests, and atomic force microscopy, the performance of asphalt samples before and after aging was analyzed, and the action mechanism of multidimensional nanomaterials was discussed. The test results showed that OEVMT/TiO2 or OMMT/TiO2 increased the viscosity and high-temperature performance of asphalt. The dispersibility and stability of the SBS modifier in asphalt were also improved. The addition of multidimensional nanomaterials to SBS-modified asphalt not only inhibited the oxidation rate of the asphalt but also reduced the impact of ultraviolet light on the asphalt during aging. As the degree of aging increased, the area of the “bee structure” in the asphalt gradually increased, and the surface roughness gradually decreased. However, the addition of OEVMT/TiO2 or OMMT/TiO2 to SBS-modified asphalt inhibited the increase in the area of the “bee structure” and improved the surface roughness of the aged asphalt. The comprehensive analysis found that the multidimensional nanomaterials improved the thermal-oxidative aging resistance and ultraviolet aging resistance of SBS-modified asphalt.

Investigation of anti-aging mechanism of multi-dimensional nanomaterials modified asphalt by FTIR, NMR and GPC

Asphalt is susceptible to being aged when exposed to thermal, oxygen and photo environment during construction or service period. To solve this issue, researchers used different sorts of nanomaterials to bring improvements to anti-aging properties of asphalt. Multi-dimensional nanomaterials (MDN) are the substances composed of two or more kinds of nanomaterials with different dimensions. Previous studies have proved the anti-aging efficiency of MDN but its mechanism is still unclear. In this paper, base asphalt was firstly modified by 1% organic expanded vermiculite (OEVMT) and 3% inorganic particles (nano-zino oxide (ZnO), nano-silica (SiO2), nano-titania (TiO2)). Then thin film oven test (TFOT), pressure aging vessel (PAV) test and ultraviolet (UV) aging test were employed on all samples. Macroscopic properties changes were characterized by physical and rheological tests while microscopic chemical structure changes were observed by Fourier transform infrared spectrometer (FTIR), Nuclear transform infrared (NMR) and Gel permeation chromatography (GPC). Results showed that MDN decreases the increment in softening point, viscosity aging index and complex modulus aging index while increases the retained penetration and phase angle aging index. Meanwhile, the addition of MDN reduces length of straight chains of unaged materials shown by NMR results, which demonstrates that the internal friction decreases when asphalt molecules move. According to GPC results, the decreased amount of large molecules is attributed to the intercalated /exfoliated structure formed by OEVMT. FTIR test results illustrated that MDN is helpful to reduce the number of sulfoxide function groups because of the absorbing/ reflecting effects of inorganic nanoparticles on ultraviolet radiation.

Synergetic Effect of Multi-Dimensional Nanomaterials on Aging Resistance of Asphalt

Abstract The effect of different nanomaterials on the aging resistance of asphalt was investigated. Three types of nanomaterials, organic expanded vermiculite (OEVMT), nano zinc oxide (ZnO), and multi-dimensional nanomaterials composed by OEVMT and ZnO, were compared. The results show that the single nanomaterial (OEVMT or ZnO) can only enhance one of the abilities to resist thermal-oxidative aging and ultraviolet aging, whereas the multi-dimensional nanomaterials can improve both types of aging resistance effectively. Moreover, compared with the single nanomaterials, the multi-dimensional nanomaterials under the same content show an excellent synergetic effect on thermal-oxidative antiaging ability and have the equivalent ultraviolet aging resistance.

Free radical scavenging behavior of multidimensional nanomaterials in γ-irradiated epoxy resin and mechanical and thermal performance of γ-irradiated composites

In order to explore the scavenging ability of free radicals in polymers and the derivation mechanism with the different influence of the composition and various structure of nanomaterials, two-dimensional graphene oxide, one-dimensional carbon nanotubes and zero-dimensional carbon black in carbon nanomaterials, and halloysite nanotubes in silicate nanomaterials were selected to carry out a task. The results manifest that the content of free radicals produced by γ-ray irradiation in epoxy resin reduced because of the introduction nanoparticle. Among them, the epoxy resin reinforced by graphene oxide has the least free radical, followed by carbon nanotubes, halloysite nanotubes and carbon black, respectively. The analysis shows that the free radical scavenging capability was significantly different in variety types of nanomaterials. The free radical scavenging ability of carbon nanomaterials is ascribed to its well-organized honeycomb lattice, which is different from the fact that silicate nanomaterials is attributed to its electron acceptor sites. Meanwhile, the stable electron cloud was formed in the carbon nanomaterials, which is more conducive to eliminate the free radicals. The addition of nanomaterials decreases the number of free radicals in the resin, and correspondingly weakens the damage of free radicals for the resin, resulting in improving the thermal stability and mechanical properties of the epoxy resin.

Influence of multi-dimensional nanomaterials composite form on thermal and ultraviolet oxidation aging resistances of SBS modified asphalt

In this study, for enhancing the resistance of asphalt against thermal oxidative and ultraviolet oxidative reaction simultaneously, the concept of multi-dimensional nanomaterials (MDNs) is proposed, referring to combinations of zero dimensional nanomaterials (like nano silica (nano-SiO2), nano zinc oxide (nano-ZnO), or nano titanium dioxide (nano-TiO2)) and two dimensional nanomaterials (like organic expanded vermiculite (OEVMT) or organic montmorillonite (OMMT)). Different combinations of nanoparticles and layered silicates were introduced into styrene–butadiene–styrene copolymer modified asphalt (SBSMA) to obtain the composite of MDNs and SBSMA. The SBSMA binders modified by MDNs were aged by laboratory simulated accelerated aging methods, and the influences of different MDNs composites on the physical and rheological properties of the SBSMA before and after aging were studied. The results show that the low-temperature ductility and the high-temperature performance of SBSMA are enhanced by adding MDNs. Especially, OEVMT + TiO2 and OMMT + TiO2 not only bring about 11.2% increase in ductility but also make SBSMA display the best rutting resistance, and OEVMT + ZnO brings about 23.7% increase in high-temperature viscosity. Furthermore, MDNs can change the trend of viscoelastic behavior of SBSMA with temperature and enhance the elastic response of SBSMA by hindering viscous movements of asphalt molecules. MDNs can effectively alleviate the aging negative effects on physical and rheological properties of SBSMA by hindering the growth of oxidation products and protecting SBS modifier from degradation. Meanwhile, this study indicates that among various MDNs composite forms, OEVMT + TiO2 or OMMT + TiO2 have the most obvious improving effects on both the thermal oxidative and ultraviolet oxidative aging resistances of SBSMA.

Investigating biological effects of multidimensional carboxylated carbon-based nanomaterials on human lung A549 cells revealed via non-targeted metabolomics approach

The biological responses of multidimensional carboxylated carbon-based nanomaterials (c-CBNs), including carboxylated graphene, carbon nanotube, and fullerene, on human lung A549 cells were investigated by using metabolomics technology. The structure and components of c-CBNs were characterized, and their biological effects were evaluated through cell apoptosis and viability analysis. Additionally, the metabolomics analysis of the nanomaterial-cell interaction system was performed using the established platform combining liquid chromatography-mass spectrometry (LC-MS) with the bioinformatics system. Results revealed that all tested c-CBNs demonstrated some biological effects in our cell model. However, significant metabolomic alterations induced by c-CBNs were also observed mainly in amino acids, organic acids, glycerophospholipids, and glycerolipids. Further, under the tested concentrations, the multiple dimensions of c-CBNs played a major role in determining the metabolic process in various interaction modes. This study provides an advanced alternative for evaluating metabolic effects of multidimensional nanomaterials through metabolomics technology considering the association between dimension and metabolic characteristics.

Laser-induced Joining of Nanoscale Materials: Processing, Properties, and Applications

• Current progress of laser joining of multidimensional nanomaterials are reviewed. • Laser joining of homogeneous and heterogenous nanomaterials are summarized. • Mechanism of laser nanojoining and practical applications are discussed. • Challenges and directions for future research in laser nanojoining are proposed. The rapid development of flexible and wearable nanodevices for a variety of commercial applications has identified a pressing need for targeted research on nanomaterials for use as building blocks in the fabrication of functional devices via bottom-up assembly. In the search for new fabrication technology, nanojoining or nanowelding has been selected as a promising method in this bottom-up approach. While there are a number of methods that can be used for nanojoining, laser processing is of interest because laser nanojoining combines high-precision property with a flexible manufacturing platform. In this review we discuss how this technology can be implemented in practical applications and outline the advantages and limitations of laser-induced nanojoining. We emphasize how laser nanojoining introduces reliability and reproducibility to the joining process, and show that this is due to precise control over heat-input in nanoscale dimensions. We also review the ways in which laser nanojoining can be integrated with other commercial fabrication operations in practical applications. To illustrate the flexibility of laser nanojoining, we give a detailed summary of joining involving a wide variety of multidimensional heterogeneous nanomaterials in the form of zero-dimension, one-dimension and two-dimension as well as the hybrid combination of these building blocks. We also discuss how laser processing can be used to generate hybrid materials with new functionalities as electrodes for various devices, optical systems and in functional circuits. The mechanisms and strategies in laser-induced joining of nanomaterials are systematically discussed in this paper along with a review of the properties and applications of the joined nanostructures. We also review some challenges in the implementation of this technology and discuss some possible directions for future research into laser-induced nanojoining.

Effect of multi-dimensional nanomaterials on the aging behavior of asphalt by atomic force microscope

The decline in properties of asphalt due to thermal-oxidative aging and photo-oxidative aging seriously affects the service life of pavement. Multi-dimensional nanomaterials composed by organic expanded vermiculite (OEVMT) and surface modified nanoparticles (nano-ZnO, nano-SiO2 or nano-TiO2) as an anti-aging composite modifier was used to improve anti-aging behavior of asphalt. The aging methods included thin film oven test (TFOT), pressure aging vessel (PAV) test and ultraviolet (UV) aging. The aging behavior and mechanism of asphalt were investigated by Peak force quantitative nanomechanical mode (PFQNM), a kind of Atomic force microscope (AFM) modes that can measure the topography, roughness, adhesion and Young’s modulus simultaneously. AFM PFQNM results show that bee-like structure is destroyed, and the dispersed phase dramatically changes after adding modifiers, while the number of bee-like structures of modified asphalt is increased after TFOT aging. Compared with the control group, increased roughness and adhesion and reduced Young’s modulus of modified asphalt prove that multi-dimensional nanomaterials could prevent asphalt aging effectively. Among the three modifiers, OEVMT + nano-ZnO shows the better improvement in aging resistance of asphalt by displaying lower Young’s modulus and higher adhesion values than OEVMT + nano-TiO2 and OEVMT + nano-SiO2, and nano-ZnO possesses the best compatibility with asphalt among three types of inorganic particles. In addition, there is a strong correlation between adhesion and Young's modulus, and its correlation coefficient is −0.87. Furthermore, the correlation degree between microstructure and physical parameters is investigated by grey relational analysis. It is proved that the microstructure can be used for the characterization of asphalt performance.

3D hierarchical self-supported NiO/Co3O4@C/CoS2 nanocomposites as electrode materials for high-performance supercapacitors.

Multi-dimensional nanomaterials have drawn great interest for application in supercapacitors due to their large accessible surface area. However, the achievements of superior rate capability and cycle stability are hindered by their intrinsic poor electronic/ionic conductivity and the erratic structure. Herein, we develop a three-dimensional hierarchical self-supported NiO/Co3O4@C/CoS2 hybrid electrode, in which NiO/Co3O4 nanosheets are in situ grown on a nickel foam substrate and combined with CoS2 nanospheres through a carbon medium. The hybrid electrode has a high specific capacity of ∼1025 C g−1 at 1 A g−1 with a superior rate performance of ∼74% capacity retention even at a current density of 30 A g−1. Moreover, the assembled NiO/Co3O4@C/CoS2//AC hybrid supercapacitor achieves excellent performance with a maximum voltage of 1.64 V and a high energy density of 62.83 W h kg−1 at a power density of 824.99 W kg−1 and excellent cycle stability performance with a capacity retention of ∼92% after 5000 cycles. The high electrochemical performance of the hybrid supercapacitor is mainly attributed to the porous structure of the NiO/Co3O4@C nanosheets and CoS2 nanospheres and intimate integration of active species. The rational strategy for the combination of various earth-abundant nanomaterials paves a new way for energy storage materials.

Preparation of a Highly Sensitive and Stretchable Strain Sensor of MXene/Silver Nanocomposite-Based Yarn and Wearable Applications.

As a wearable device, highly sensitive and stretchable strain sensors should be integrated to monitor various daily actions, which include large- and small-scale strains, such as jumping, running, heartbeat, and pulse. At present, the method of preparing strain sensors is mainly to impregnate or load materials like graphene, carbon nanotube, and their union products on elastic substrates to obtain highly sensitive characteristics. Both well-known carbon-based and other single-dimensional nanomaterials do not have high flexibility and conductivity, which limits the improvement of sensitivity. However, a novel material MXene Ti3C2Tx has a two-dimensional (2D) sheet structure, which allows for higher electron and ion transmission rates. In addition, it is easier to be combined with other nanomaterials as a nanosubstrate, greatly improving malleability. Hence, we creatively prepared zero-dimensional (0D)-one-dimensional (1D)-2D multi-dimensional nanomaterials, which designed 0D silver nanoparticles (AgNPs) loaded on 2D MXene nanosheets and compounded with 1D silver nanowires (AgNWs). The method improves the elasticity and conductivity of traditional single-dimensional materials, wherein AgNPs built a bridge between AgNWs and MXene, which ensures continuity and a high gauge factor even at a large strain (200%) of yarn. The composite yarn strain sensor has a remarkably high strain and sensitivity, effectively monitoring the large and small deformations of various parts of the human body, whose fabric can be an electrothermal device. It has vital inspiration for the development of intelligent textiles, which would be used in medical devices, artificial skin, and other wearable fields.

Influence of layered silicate types on physical, rheological and aging properties of SBS modified asphalt with multi-dimensional nanomaterials

Influence of layered silicate types on composite ratio of multi-dimensional nanomaterials (MDNs) in styrene-butadiene-styrene copolymers modified asphalt (SBSMA) was investigated. Two types of layered silicate, organic expanded vermiculite (OEVMT) or organic montmorillonite (OMMT), were selected to combine MDNs with nano-titanium (nano-TiO2). Physical, rheological and aging characteristics of SBSMA with MDNs were tested. The results show that introducing MDNs can augment the ductility, viscosity, elasticity and rutting factor of SBSMA to a certain extent, and the OMMT + TiO2 leads to more apparent increase in viscosity compared with the OEVMT + TiO2. Moreover, the physical and rheological properties of SBSMA after thermo-oxidative and ultraviolet aging can be improved simultaneously by introducing MDNs, and the improvement effect depends on the composite types and ratios. The optimal ratios of MDNs in SBSMA, OEVMT(1%) + TiO2(3%) and OMMT(1%) + TiO2(2%), are recommended. Furthermore, the OEVMT(1%) + TiO2(3%) possesses the better resistance for thin film oven test and ultraviolet aging, while the OMMT(1%) + TiO2(2%) has the better resistance for pressure aging vessel aging.