Higher Breaking Strength Research Articles

Constructing stimuli-free self-healing, robust and ultrasensitive biocompatible hydrogel sensors with conductive cellulose nanocrystals

Self-healing conductive hydrogels as artificial skin-like materials hold great potential applications in the fields of artificial intelligence, soft robotics and personal healthcare. However, it remained challenging to construct stimuli-free self-healing biomimetic hydrogels with ultra-stretchability and excellent sensitivity. Herein, polyaniline (PANI) was coated on the surface polycarboxylic multi-branched cellulose nanocrystals (Multi CNC-PANI) via templated polymerization. Afterword, rod-like Multi CNC-PANI served as a dynamic bridge endowed those hydrogels hierarchical structure and dynamic hydrogen bond interactions doped with polyvinyl alcohol (PVA)/borax system. Combined with the dynamic borate ester bonds, the biomimetic nanocomposite hydrogels had high breaking strength (171.52 KPa), ultra-stretchability (1085%), rapid self-healing properties, adhesiveness, decent biocompatibility, and sensitivity. Especially, the hydrogels could keep good self-healing ability both in air and underwater without any stimuli, and the self-healing efficiency could reach up to 99.56% within 120 s. This hydrogel sensor could sensitively detect and distinguish human motions including swallow, fingers, wrist, elbow and knee joints, in real-time. Besides, the self-healed hydrogel gave detective signal with uniform and repeatable sensitivity, which endowed the hydrogels mechanically adaptability and good store stability. Therefore, the strategy may provide unique opportunities in designing biomimetic sensors with skin-like mechanical stretchability, sensitivity and self-healing properties.

Intrinsic-to-extrinsic transition in fracture toughness through structural design: A lesson from nature

Catastrophic failure of materials and structures due to unstable crack growth could be prevented if fracture toughness could be enhanced at will through structural design, but how can this be possible if fracture toughness is a material constant related to energy dissipation in the vicinity of a propagating crack tip. Here we draw inspiration from the deformation behavior of biomolecules in load bearing biological materials, which have been evolved with a large extensibility and a high breaking strength beyond their elastic limit, and introduce an effective biomimetic strategy to enhance fracture toughness of a structure through an intrinsic to extrinsic (ITE) transition. In the ITE transition, toughness starts as an intrinsic parameter at the basic material level, but by designing a protein-like effective stress–strain behavior the toughness at the system level becomes an extrinsic parameter that increases with the system size without bound. This phenomenon is demonstrated through a combination of numerical simulations, analytic modeling and experiments, and leads to a biomimetic strategy which can be broadly adopted to enhance fracture toughness in engineering systems.

TiO2-Seeded Hydrothermal Growth of Spherical BaTiO3 Nanocrystals for Capacitor Energy-Storage Application

Simple but robust growth of spherical BaTiO3 nanoparticles with uniform nanoscale sizes is of great significance for the miniaturization of BaTiO3-based electron devices. This paper reports a TiO2-seeded hydrothermal process to synthesize spherical BaTiO3 nanoparticles with a size range of 90–100 nm using TiO2 (Degussa) and Ba(NO3)2 as the starting materials under an alkaline (NaOH) condition. Under the optimum conditions ([NaOH] = 2.0 mol L−1, RBa/Ti = 2.0, T = 210 °C and t = 8 h), the spherical BaTiO3 nanoparticles obtained exhibit a narrow size range of 91 ± 14 nm, and the corresponding BaTiO3/polymer/Al film is of a high dielectric constant of 59, a high break strength of 102 kV mm−1, and a low dielectric loss of 0.008. The TiO2-seeded hydrothermal growth has been proved to be an efficient process to synthesize spherical BaTiO3 nanoparticles for potential capacitor energy-storage applications.

Synthesis and properties of free-standing monolayer amorphous carbon.

Bulk amorphous materials have been studied extensively and are widely used, yet their atomic arrangement remains an open issue. Although they are generally believed to be Zachariasen continuous random networks1, recent experimental evidence favours the competing crystallite model in the case of amorphous silicon2-4. In two-dimensional materials, however, the corresponding questions remain unanswered. Here we report the synthesis, by laser-assisted chemical vapour deposition5, of centimetre-scale, free-standing, continuous and stable monolayer amorphous carbon, topologically distinct from disordered graphene. Unlike in bulk materials, the structure of monolayer amorphous carbon can be determined by atomic-resolution imaging. Extensive characterization by Raman and X-ray spectroscopy and transmission electron microscopy reveals the complete absence of long-range periodicity and a threefold-coordinated structure with a wide distribution of bond lengths, bond angles, and five-, six-, seven- and eight-member rings. The ring distribution is not a Zachariasen continuous random network, but resembles the competing (nano)crystallite model6. We construct a corresponding model that enables density-functional-theory calculations of the properties of monolayer amorphous carbon, in accordance with observations. Direct measurements confirm that it is insulating, with resistivity values similar to those of boron nitride grown by chemical vapour deposition. Free-standing monolayer amorphous carbon is surprisingly stable and deforms to a high breaking strength, without crack propagation from the point of fracture. The excellent physical properties of this stable, free-standing monolayer amorphous carbon could prove useful for permeation and diffusion barriers in applications such as magnetic recording devices and flexible electronics.

Stress Rupture Properties of Welded Joints of Austenitic Heat-resistant Super304H Steel at 650 °C

With the help of metalloscope, scanning electron microscope and its energy dispersive spectroscopy, this paper investigates the stress rupture properties at high temperature and microstructure changes of the welded joints of austenitic heat-resistant Super304H steel at 650 °C as well as the effects of microstructure changes on stress rupture properties by high temperature creep rupture testing. The results show that at 650 °C, the welded joint of Super304H steel has high breaking strength at elevated temperature, and the fracture position is on the base material away from the fusion line, and the fracture type is mainly a transcrystalline rupture. The microscopic process of creep rupture of Super304H steel welded joints is the nucleation and growth of the void and crack, while the large bulk Nb(C,N) is the main nucleation site of void. As the careep time increases, M23C6 on the grain boundary is also the main nucleation site of the void.

Electromagnetic interference shielding characteristics of a core layer-coated fabric with excellent hand-feel characteristics

Electromagnetic shielding fabric (ESF) is a novel electromagnetic shielding product with portability, flexibility, and good mechanical properties. However, the existing ESFs suffer from poor washing fastness of coating and poor comfort performance in terms of hand-feel characteristic. In this study, a core layer-coated yarn (CLCY) was successfully spun using a carboxylic acid-functionalized multi-walled carbon nanotube/polypyrrole/Fe3O4 composite suspension with polyvinyl butyral as an adhesive agent. To better explore the properties, the original fabric and treated fabrics, viz., core layer-coated fabric (CLCF) and surface layer-coated fabric (SLCF), were characterized by several methods. Scanning electron microscopic observations revealed that the coating was on the core layer in CLCF. In addition, the Fourier-transform infrared spectroscopy and X-ray diffraction spectroscopy results revealed that the composition of the coating corresponds with that in the multi-composite suspension. Moreover, the coating of CLCY formed a conductive path with good conductivity in the core layer, but the conductivity of the coating on the surface layer of SLCF deteriorated sharply after washing. Further, compared with the original fabric and SLCF, CLCF has highest breaking strength (after 10 washes), and keeps a relatively good hand-feel characteristic. Finally, the evaluated electromagnetic interference shielding characteristics reveal that the fastness of coating affects the electromagnetic shielding effectiveness, suggesting that the wrapped protection of outside staple fibers in CLCF reduce the loss of coating in the core layer during washing. However, the coating on the surface layer in SLCF could be washed away easily.

Полимерные пьезоэлементы на основе пористых пленок поливинилиденфторида и контактных электродных слоев полианилина

The preparation method to obtain the new hybrid piezoactive systems by successive layer-by-layer aniline polymerization in situ on the porous polyvinylidene fluoride films formed in the process based on melt extrusion has been elaborated. It is established by IR spectroscopy that the conducting form of polyaniline (emerald salt) is synthesized. It is proved that the samples containing two layers of polyaniline are characterized by higher electroconductivity than the single-layer ones, and its value increases with the orientation degree of the support. It is confirmed by electron microscopy that this effect is due to the higher homogeneity and ordering of the conducting layer in more oriented samples. It is shown that hybrid samples have a higher breaking strength, elastic modulus and break elongation than support. Electro- and piezoactive properties of the hybrid systems were studied by cyclic voltampermetry and piezomodulus testing using polyaniline layers as contact electrode materials. Piezoconstants of the samples were measured depending on the direction of loading.

Structural and Electrical Properties of Solution Casted-BaTiO₃-Polyvinylidene Composite Layers.

Ceramic doped-polymer structures constitute a new area of functional materials, which are very promising because they combine hardness of ceramics with plasticity, low density, and high breaking strength of polymers. Piezoelectric composites are remarkable candidates for use in technical applications such as sensors and actuators, owing to their ability to integrate electrical and mechanical signals. Here, uniform ceramic-polymer composites (0-3 type) of tetragonal BaTiO₃ powder as a ceramic filler and polyvinylidene fluoride as a polymer matrix were prepared using solution casting. X-ray diffraction analysis confirmed the existence of both ceramic and polymer crystalline phases. Field emission-scanning electron microscope was used to confirm the uniformity of the prepared composites, because for 0-3 composites it is critical to ensure a homogeneous distribution of the filler in the matrix. The layer was flexible with the total thicknesses in the 60~70 μm range. The dielectric properties of the composite layer were analyzed for frequencies ranging from 50 Hz to 1 MHz, using an LCR meter at room temperature. Dielectric permittivity measurements of the prepared ceramic-polymer composite layers revealed higher permittivity compared with a pure polyvinylidene fluoride layer.

Fracture Reduction in Steel Cord Manufacturing Process

Improve quality and productivity performance of a steel cord manufacturing system. The most importuned material of steel cord for tyre manufacturing process and that steel cord have good mechanical properties of high breaking strength, and low thermal coefficient of expansion as compared to nylon. Process for producing a Steel cord for pneumatic tires comprising a bunch of wires and core, the core of which consists of 3wire filaments arranged and bunched together in parallel. Then 6 wire (filament) on Core twisted and bunched in together. While processing on steel cord we faced wire fracture frequently like torsional fracture, power fracture, one filament fracture, entanglement fracture bad winding issue due to interrupted power and improper clamping of spool (wire Bobbin) and machine vibration. In this project have modified to Spool shaft on wire drawing machine. In this shaft, locking position and changed that shaft design. That shaft was reduced the spool wobbling while running on machine. In bunching machine, the circuit have power circuit-1, power circuit-2, control circuit, and commend circuit. The command and control circuits connected by uninterrupted power and power circuits connected with normal power (EB power). When power the cut-off, command and control circuit switchover to uninterrupted power, and it lead to smooth stop in machine. Thus, the changes have leads to reduce the fracture in cord manufacturing process.

Synthesis and characterization of carbon black modified by polylactic acid (PLA‐g‐CB) as pigment for dope dyeing of black PLA fibers

ABSTRACTDope dyeing is a clean method to produce a color polylactic acid (PLA) fiber. In order to investigate the influence factors of dope dyed PLA fiber, three kinds of PLA modified carbon black (PLA‐g‐CB) pigments with different particle size were prepared by open‐ring polymerization method, which were further used for dope dyed black PLA fiber. The resultant black fiber was characterized by TEM, SEM, and DSC. The effect of particle size and concentration of PLA‐g‐CB pigments on color, mechanical property, and crystallization behavior of dope dyed PLA fiber were studied. Dope dyed black PLA fiber reached its good color property including K/S and leveling property when PLA‐g‐CB (I) pigment was the colorant with a concentration of 1.5%. Moreover, the dope dyed black PLA fiber containing PLA‐g‐CB (I) pigment had high breaking strength, crystallinity, fastness, and migration resistance to water and ethanol. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48784.

Fidelity of new chemical degumming method for obtaining superior properties of Bast fiber from Apocynum venetum

Bast fibers from Apocynum venetum (A. venetum) have the potential to be a natural cellulose textile fiber similar to jute and ramie. In this study, endeavors were made to extract fiber from the bast of A. venetum using a new chemical degumming method (Fiber-N) instead of traditional acid pretreatment and alkali degumming. Traditional chemical degumming (Fiber-C) has certain disadvantages, such as the use of acid for pretreatment and prolonged high-temperature cooking, which causes severe fiber damage and is also an environmental hazard. To overcome these limitations, it is essential to find a new chemical degumming method. Fibers obtained by the new method (Fiber-N) and the traditional method (Fiber-C) were characterized by X-ray diffraction, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), residual gum content, fiber yield, and mechanical property measurement. Compared with Fiber-C, 2 h of the new degumming method (2 h Fiber-N) exhibited 15.15% lower residual gum content, 48.5% higher breaking strength, 22.15% higher breaking elongation, and 27.27% higher fiber yield along with substantial savings of water and energy, 22.22% and 60.75% respectively. Furthermore, SEM images of the Fiber-N process fibers showed a smooth surface with no impurities, indicating that the Fiber-N process is simpler, efficient, and could be a superior method of extracting fibers from the bast of A. venetum.

Development of acceptable high‐quality noodles using nonglutinous rice cultivar Akitakomachi flours

AbstractBackground and objectivesTo elucidate the effects of four different particle sizes of flour from the nonglutinous rice cultivar Akitakomachi on noodle quality and the factors that affect the production of acceptable high‐quality noodles.FindingsThe damaged starch content was lowest in the flour with a particle size range of 53–212 μm, and the water absorption rate increased as the flour particle size ranges decreased. By textural and sensory analyses, noodles made from flour with a particle size range of 53–212 μm showed high breaking strength, cohesiveness, smoothness, gelatinization degree, and acid solubility and low adhesiveness. The expansion rate of noodle strands after cooking, especially noodle width and thickness, was fairly high, and the solubility of proteins and sugars was low in strands made with 0.5% grain vinegar compared to those made without grain vinegar. The total and surface SH group contents in different protein fractions were not different between noodles produced with and without grain vinegar.ConclusionsAcceptable high‐quality noodles were produced using flour with a particle size range of 53–212 μm and 0.5% grain vinegar. The high‐order structural changes in the rice protein molecules by grain vinegar treatment significantly contributed to noodle quality, particularly their satisfactory firm texture.Significance and noveltyThe use of flour with a particle size range of 53–212 μm and the addition of grain vinegar were important factors for the production of high‐quality noodles with flour from the nonglutinous rice cultivar Akitakomachi. These results provide useful information for rice flour noodle industries.

The differences of gonadal hormones and uterine transcriptome during shell calcification of hens laying hard or weak-shelled eggs

BackgroundEggshell breaking strength is critical to reduce egg breaking rate and avoid economic loss. The process of eggshell calcification initiates with the egg entering the uterus and lasts about 18 h. It follows a temporal sequence corresponding to the initiation, growth and termination periods of shell calcification. During each period of shell calcification, our study investigated the differences of gonadal hormones and uterine transcriptome in laying hens producing a high or low breaking strength shell.Results60 Hy-line Brown laying hens were selected and divided into two groups according to eggshell breaking strength. Eggshell breaking strength of 44.57 ± 0.91 N and 26.68 ± 0.38 N were considered to be the high strength group (HS) and low strength group (LS), respectively. The results showed that mammillary thickness and mammillary knob width of eggshells were significantly lower in the HS. Serum progesterone (P4) and 1,25-dihydroxy vitamin D3 [1,25-(OH)2D3] were significantly higher in the HS compared to the LS during the initiation period of calcification. Serum estradiol (E2) and calcium did not change significantly. All factors mentioned above had no significant differences in the growth and termination periods of calcification. The relative expression of CaBP-D28k and PMCA 1b were not significantly different between HS and LS. The relative expression of NCX1 was significantly higher in HS compared to LS. Moreover, 1777 differentially expressed genes (DEGs) were obtained in the initiation period of calcification. However, few DEGs were identified in the growth or termination periods of calcification. 30 DEGs were selected as candidate genes involved in eggshell calcification during the initiation period of calcification by the analysis of GO terms and KEGG pathways.ConclusionsOur study concluded that mammillary thickness and mammillary knob width of the HS were significantly lower than LS. P4 and 1,25-(OH)2D3 were significantly higher in the initiation period of HS. They may impact initial calcification when the mammillary layer is formed. The initiation period of calcification determined eggshell strength rather than the growth or termination periods. We inferred P4 or 1,25-(OH)2D3 may effect the ultrastructure of the mammillary layer by regulating the expression of uterine genes.

A Comparative Study on Properties of Cellulose/Antarctic Krill Protein Composite Fiber by Centrifugal Spinning and Wet Spinning

Cellulose/antarctic krill protein (C/AKP) composite fibers are successfully prepared by centrifugal spinning. The main purpose of this paper is to compare the properties of C/AKP composite fibers prepared by centrifugal spinning and wet spinning. The hydrogen bond type, break strength, morphology, crystallinity, and thermal stability are analyzed by Fourier transform infrared spectroscopy, electronic single silk strength testing, X-ray diffraction, scanning electron microscopy, and differential scanning calorimetry. The results show that the C/AKP composite fibers contain intramolecular hydrogen bonds (OH-OH and annular polymer bonds) and intermolecular hydrogen bonds (OH-π, OH-ether O, and OH-N). The centrifugal spinning composite fibers have a higher percentage of intermolecular hydrogen bonds, a higher break strength, and higher crystallinity than the wet spinning fibers. The wet spinning composite fibers have a more obvious groove structure and a higher degree of swelling than the centrifugally spun fibers.

Effects of genotype and housing system on some bone biomechanical characteristics in broiler chickens

The aim of this study was to determine the effects of two genotypes (slow-growing and fast-growing) and three housing systems (deep litter, plastic slat and free-range) on some bone biomechanical properties of broiler chickens and to evaluate the interaction between genotype and housing systems. Broilers from two genotypes were reared at three different housing conditions. Fifteen bones were randomly selected from each housing system in both slow-growing and fast-growing groups, and the experiment was performed on 90 bones in total. To determine bone characteristic and biomechanical traits of tibiotarsi, bones collected from right leg and then weighed, cortical area measurements and three-point bending tests were applied. Both live body weight and carcass weight were significantly affected by genotype and housing systems. There was no interaction between genotype and housing system in terms of bone weight, cortical area, breaking strength, bending strength, and deflection. Also, housing systems had no statistical effect on these parameters. Fast-growing broilers were significantly had heavier tibiotarsi, larger cortical area and higher breaking strength than slow-growing broilers, while bending strength was significantly lower in fast-growing broilers. Deflection was not affected by genotype or by housing system. In conclusion, bone geometry and biomechanical properties were not affected by housing systems but by genotype. Fast-growing broilers had better bone morphology and stronger bones than slow-growing genotype. Therefore, fast-growing genotype can provide positive effects on bone growth and mechanical properties in broilers.

Effect of Heat Treatment on Properties of Titanium Biomedical Alloy

The aim of this work to study the effects of heat treatments on the alloy (Ti6Al4V) which produced by powder metallurgy methods and consists of a mixture of the following powders (titanium 90%, aluminum 6% and vanadium 4%).The heat treatments (sintering process) take place in different time of stay. The alloy (Ti6Al4V) used as biomaterials in the medical field due to their excellent properties such as : high corrosion resistance, high wear resistance, high breaking strength, higher ductility, non-toxic and non-magnetic, suitable elasticity coefficient, where used as an alternative to replacing damaged hard tissues such as orthopaedic, osteosynthesis, full hip joint, knee joint and dental implants. The elements were weighed by a highly sensitive electronic balance, the powder was mixed for five hours, Then press with a pressure (700 MPa) to transition to green cylindrical samples with a diameter of 13 mm. The sintering process was carried out at 1100 °C. The porosity of the samples decreases at high temperatures and time of stay to a certain extent and then increase porosity at very high temperatures due to the growth of particle and the expansion of gases. The density of the samples after the sintering process increases with increasing the temperature because increase the mass diffusion of particles and reduces porosities that increase contact points between particles. The sintering processes lead to increase the hardness, where the hardness was tested in the Vickers hardness method. The wear increased by increasing (load, time and sliding distance), and increase the hardness leads to a low volume loss (the amount of metal lost a few) as the relationship between them is inverse. To study the corrosion behavior of the samples that have been sintering processes under different time of stay and to perform this test (tafel Extrapolation test) in 0.9 NaCl solution, where the sample is subjected to high temperature and a long period of stay and therefore This lead to increases the diffusion and increases the contact points between the particles and increase the forces of bonds between the particles and this leads to increased corrosion current and therefore the oxidation process to be a high degree and this leads to the higher rate of corrosion.

Effects of the Particle Size of BaTiO₃ Fillers on Fabrication and Dielectric Properties of BaTiO₃/Polymer/Al Films for Capacitor Energy-Storage Application.

BaTiO3/polymer/Al (BPA) composite films for energy storage were fabricated by way of a roll coating and thermal curing process. The coating slurry consisted of silicon-containing heat-resistant resin (CYN-01) and BaTiO3 particles with various particle sizes obtained from commercial BaTiO3 powders processed at different durations of wet sand grinding in the presence of silane coupling agent (KH550), which not only improves the dielectric performance of the BPA films but also facilitates its production in a large scale. The major influence factors, such as the ratio between BaTiO3 and resin and the size of BaTiO3 particles, were investigated and their related mechanisms were discussed. The results show that modifying BaTiO3 particles (D90 = 0.83 μm) with the silane coupling agent of KH550 enhances the dielectric properties of the BPA films. The typical BPA films obtained exhibit a high dielectric constant of 32, a high break strength of 20.8 V/μm and a low dielectric loss of 0.014. The present work provides a simple and convenient way to prepare high-quality ceramic/polymer composite films for energy-storage application in a large scale.

Esophageal Biomechanics Revisited: A Tale of Tenacity, Anastomoses, and Suture Bite Lengths in Swine

Anastomotic tension has repeatedly been associated with anastomotic leakages after esophagectomy for cancer or esophageal atresia repair. We therefore aimed to determine which anastomotic technique would come as close as possible to the native esophagus in sustaining traction forces. Constant traction for several minutes at esophageal remnants and large suture bites are also considered relevant in long-gap esophageal atresia repair. Porcine esophagi were subjected to linear traction using a motorized horizontal test stand. We compared breaking strengths of native esophagi to simple continuous, simple interrupted, stapled, and barbed suture anastomoses. We also investigated the effects of suture bite length and phases of constant traction on breaking strengths and powered all experiments to at least 80% using exploratory investigations (n= 5 per group). Continuous suture anastomoses had a breaking strength comparable to native esophagi (Δ=-5.25 Newton, 95% confidence interval:-10.69 to 0.19 Newton, p= 0.058) and outperformed all other investigated anastomoses (Δ ≥14.01 Newton, p ≤ 0.02). Breaking strength correlated with suture bite length (R= 0.905) and predicted breaking strength for the simple stitch (adjusted R2= 0.812, p < 0.0001), but not for anastomoses. Phases of incrementally increasing constant traction resulted in higher breaking strengths (Δ= 13.36 Newton, 95% confidence interval: 9.93 to 16.79 Newton, p< 0.0001) and higher length gain (Δ= 1.06 cm, 95% confidence interval: 0.65 to 1.48 cm, p < 0.0001) compared with controls. Only simple continuous anastomoses achieved the linear breaking strength of native tissue. Our study provides important insights in tolerance to traction forces, but its results have to be corroborated in living animals as anastomotic leakages are multifactorial processes.

Sizing process of cotton yarn by size from a copolymer of methacrylic acid and hydrolyzed potato starch

In this paper, the synthesis, characterization and application of a copolymer as a sizing agent obtained by the grafting of methacrylic acid on hydrolyzed potato starch were investigated. Starch hydrolysis was performed in order to reduce the average molar mass (i.e. the size of the macromolecules). Grafting of methacrylic acid on hydrolyzed potato starch was performed to obtain a product that can be effective in textile processing, for example, for sizing yarn. The grafting of the monomer has been confirmed by Fourier transform infrared spectroscopy spectra of hydrolyzed and grafted potato starch. The distribution of molar masses was determined chromatographically. The results obtained by sizing of cotton yarn with the new starch agent confirmed its higher breaking strength, elongation, abrasion resistance, reduced hairiness, better evenness, etc. Grafted hydrolyzed potato starch (almost identical to the commercial medium) exhibits better performance as a potential agent for sizing cotton yarn than ungrafted hydrolyzed starch.

Mixed matrix membranes comprising aminosilane-functionalized graphene oxide for enhanced CO2 separation

Mixed matrix membranes (MMMs) are challenged by the non-ideal interfacial morphologies that leads to the weakened gas separation performances and mechanical strength. Filler surface modification with organosilanes is an effective approach to build the linkage between polymer and the fillers. In this study, we fabricated MMMs by introducing aminosilane functionalized graphene oxide (f-GO) nanosheets into Pebax® 1657 matrix. The introduction of f-GO decreased the crystallinity and increased chain mobility of Pebax matrix. Benefiting from the improved filler dispersion, semi-interpenetrated Pebax chains in the Si-O-Si network at the interface, and the high intrinsic mechanical strength of GO, the MMMs exhibit a 1.7-times higher Young's modulus and 1.1-times higher break strength. The amino groups on GO help to construct a facilitated transport pathway along the polymer-filler interface. With greatly improved CO2 separation performances in dry state, the membranes exhibited even higher performances in humidified state. Particularly, Pebax/f-GO-0.9% membrane showed a high CO2 permeability of 934.3 Barrer, and a CO2/CH4 selectivity of 40.9, a CO2/N2 selectivity of 71.1, surpassing the Robeson upper bound and quite promising for carbon capture.