Electronic Universal Testing Machine Research Articles

Effect of HfC addition on the microstructure and properties of W–4.9Ni–2.1Fe heavy alloys

In this study, W–4.9Ni–2.1Fe-xHfC mixed alloy powders were prepared by secondary high-energy ball milling and secondary hydrogen annealing, and then sintered and consolidated by spark plasma sintering (SPS) techniques. The microstructure, mechanical properties, wear resistance and corrosion behavior of alloy were obtained by Vickers hardness tester, X-ray diffraction, scanning electron microscopy, reciprocating frictional wear testing machine, CHI 660 E electrochemical workstation and electronic universal testing machine. The results showed that a certain amount of Hafnium carbide (HfC) could effectively inhibit the growth of W particles during sintering process, make the bonding phase disperse more evenly, and effectively improve the hardness, relative density, compression strength, friction and wear properties as well as corrosion resistance of alloy. When the content of HfC was excessive, the inhibition effect of particle growth would be weakened and the bonding phase tended to agglomerate, affecting the strength and hardness, and reducing the abrasion performance and corrosion resistance of alloy. By comparison, the alloy with 0.4 wt% HfC showed the best comprehension performance.

Forming mechanism of a seedling tray comprised of lignocellulose in cow manure

A new method for producing biomass seedling trays with cow manure was developed based on heating to above the glass transition point of the lignin in cow dung. The maize seedling tray, manufactured through heat compression molding, could potentially meet the demand for transplanting maize seedlings. A scanning electron microscope and universal testing machine were used to compare the changes in the internal structure and mechanical properties of the seedling tray before and after the seeding period through a compression molding technique at normal temperature before seeding and a heat compression molding technique after seeding. The results showed that the strength of the seedling tray was mainly derived from the mechanical setting force of the fiber laminated in the seedling tray. Meanwhile, the moisture in the seedling tray hindered the lignin from filling in the gaps between the stem fibers in cow manure, as well as it reduced the protective effect of lignin on the laminated inlay structure of the stem fibers in cow manure. Therefore, under the premise that the material could be completely filled in the mold, the study concluded that a lower moisture content resulted in better strength and water resistance of the seedling tray. As such, this study provides an idea for the functional utilization of cow manure.

Changing Characteristics of Sandstone Pore Size under Cyclic Loading

The size and distribution of pores in rocks are closely related to their physical and mechanical properties. It is important to study the structure and distribution of pore size inside the rock to assess the risk of damage to a given rock volume. These characteristics were studied under different pressures, pore diameters, and pore throat size distribution laws using a UTM5540 electronic universal testing machine, magnetic resonance imaging scanning, and low field nuclear magnetic resonance spectroscopy with cyclic loading on yellow sandstone. We found the following. (1) Under 0–10 MPa load, the peaks of the sandstone T 2 spectrum move left as load increases, and the porosity of the sandstone decreases. The peak area of the middle relaxation spectrum increases as pressure increases from 10 to 20 MPa, and a peak for the long relaxation time spectrum appears. (2) Under 0–10 MPa load, the spectral peak associated with a large pore moves left and decreases in area as pressure increases. Under 10–20 MPa load, the large-pore spectral peak moves right and increases in area as pressure increases. (3) Under the applied 0–10 MPa load, the porosity of water-saturated sandstone gradually decreases, and the sandstone NMR images darken with increasing load. The porosity of saturated sandstone gradually increases under 10–20 MPa pressure, and its NMR image brightens. (4) The number of small pore throats increases with increasing load, but the number of large- and medium-sized pore throats decreases. From 0 to 15 MPa, crack (>1 micron) abundance decreases, and fractures are generated by compaction under a 20 MPa load. The pore interconnectivity is enhanced, as are the number and size of pores in the sandstone. With continuing increasing pressure, the numbers of pores and penetration of cracks increase, which damages the sandstone.

Evaluation of fracture strength of two kinds of zirconia all-ceramic crowns with different edge compensation angles

Objective To evaluate the effects of different edge compensation angles on the fracture strength of multilayer zirconia all-ceramic crowns and traditional uniform zirconia all-ceramic crowns. Methods The resin tooth preparation specimen of the mandibular first molar with a knife-edge was fabricated. A 3D digital model of the specimen was obtained by scanning it with a 3D dental model scanner. The 3D digital model was imported into computer aided design (CAD) software, and three 3D digital models of the full crown with the same surface shape are designed with the edge compensation angles of 30°, 45° and 60°, respectively. Then, the designed 3D digital model is imported into computer aided manufacturing (CAM) software. Three kinds of multilayer and homogeneous zirconia all-porcelain crowns with different edge compensation angles were fabricated, 10 each for a total of 60. The fracture load of each crown was measured under the electronic universal testing machine. Results Fracture load of multilayer and uniform zirconia all-ceramic crowns, (4 322.86±610.07) N and (5 914.12±596.80) N in the 30° group, (5 264.82±883.76) N and (5 220.83±563.38) N in the 45° group and (4 900.42±345.41) N and (5 050.22±560.24) N in the 60° group, respectively. The fracture load of multi-layer zirconia all-ceramic crowns in the 30° group was significantly lower than that of homogeneous zirconia all-ceramic crowns(P 0.05). In the multi-layer zirconia all-ceramic crowns: the fracture load of the 30° group was significantly lower than that of the 45° group (P 0.05).In uniform zirconia full crown group: the 30° group was higher than the 45° group, the 30° group was higher than the 60° group (P 0.05). Conclusion The fracture loads of three kinds of uniform and multilayer zirconia all ceramic crowns with different edge compensation angles can meet the clinical requirements. A smaller edge compensation angle is recommended when using traditional zirconia all-ceramic crowns, while 45° is recommended when using multi-layer zirconia all-ceramic crowns.

PREPARATION AND CHARACTERIZATION OF CELLULOSE FILMS FROM FICUS NATALENSIS BARK CLOTH FIBERS

In this study, cellulose films were prepared from Ficus natalensis bark cloth fibers via phase inversion technique using NaOH/urea/water as the solvent. Films were formed at a concentration of 7 wt. % and 8 wt. % of microcrystalline cellulose (MCC) as isolated from Ficus natalensis bark cloth fibers. Their morphology, physiochemical, and mechanical properties were examined with scanning electron microscopy (SEM), Fourier transform IR spectroscopy (FTIR), x-ray diffraction (XRD), thermal gravimetric analysis (TGA) and microcontrolled electronic universal testing machine. The resultant regenerated cellulose (RC) films exhibited rough surfaces morphologically, good tensile strength (19.85 ± 0.13 MPa), exhibited a plastic behavior with considerable strains. However, they are thermally stable at higher temperatures up to 280 °C. Cellulose films from this study could potentially act as biodegradable packaging materials to upgrade the scope of application of Ficus natalensis bark

Age-Related Changes of Material Mechanics and Bone Material Parameters of Rat Skulls.

Objective To study the relationship between material mechanics and bone material parameters of rat skulls and their correlation with age by examination of the parameters. Methods Forty-eight healthy male SD rats were divided into 2, 4, 6, 8, 17, 26, 52 and 104 week groups according to their age. Each group had six rats. The right cranium was compressed by KD Ⅱ-0.2 microcomputer controlled electronic universal testing machine, and material mechanics parameters （ultimate load, compression strength and compression modulus） were measured, then the skull slices were cut off and scanned by Micro-CT system to detect bone material parameters （skull thickness, bone mineral density, bone volume, and trabecular thickness）. Results The differences in ultimate load, compression strength and compression modulus among all groups had statistical significance （P<0.05）, and were positively correlated with age within 26 weeks （P<0.05）. The differences in skull thickness, bone mineral density, bone volume and trabecular thickness among all groups had statistical significance （P<0.05）, and were positively correlated with age within 52 weeks （P<0.05）. All material mechanics parameters were positively correlated with bone material parameters （P<0.05）. Conclusion There is a positive correlation between bone material parameters （skull thickness, bone mineral density, bone volume, trabecular thickness）, material mechanics parameter （skull ultimate load, compression strength, compression modulus） and age in a certain range, which can be used to infer age.

Experimental study on the influence of bending and straightening cycles for non-destructive and destructive coiled tubing

During each operation in wells, the coiled tubing has to undergo three straightening-bending-straightening plastic deformations, causing different damages on coiled tubing (ellipse, scratches on the surface), which results in low cycle fatigue failure occurring frequently. According to the failure shapes and causes of the coiled tubing, the described damage forms of coiled tubing are: ellipticity, axial scratches, circumferential scratches and square pits. A special fatigue experimental device is designed and built under the electronic universal tensile testing machine CMT5105 in the laboratory, and the commonly used 2–3/8″ coiled tubing is selected. The non-destructive and destructive coiled tubing with ellipse and scratches are carried out cyclic bending-straightening experiments. The experimental results show that: (1) When the internal pressure of the coiled tubing is less than 40 MPa, it does not affect the number of underground operations for the coiled tubing, but the applied internal pressure is equal to or greater than 40 MPa, the number of underground operations is significantly reduced. (2) If the internal pressure and ellipse exist simultaneously on the coiled tubing, the ellipse has little effect on the number of operations. (3) The influence of circumferential scratches on the fatigue life is greater for the coiled tubing, while the axial and square pits have less effect on the cyclic numbers. (4) The formula of fatigue life is established for destructive coiled tubing, which can provide theoretical basis for the failure prediction and control for coiled tubing in engineering.

A nonlinear damage constitutive model of PVC coated fabrics

A simple and effective damage constitutive model for PVC-coated fabrics be developed, which could be used to predict the nonlinear mechanical response of membrane structures under tension more accurately. In this paper, based on continuum damage mechanics theory, a nonlinear damage constitutive model for PVC-coated fabrics was established. Firstly, the off-axis tensile tests were carried out on the membrane material at 0 °, 15 °, 30 °, 45 °, 60 °, 75 °, and 90 ° with an electronic universal tensile testing machine, and the tensile curves of seven specimens were obtained. Then, the Helmholtz free energy function is constructed based on the continuum damage mechanics theory and the existing research foundation, and the constitutive equation of the material is derived. Then, according to the characteristics of the off-axial tensile test curve of the coated fabrics, a damage evolution equation for the materials under tension was established with strain as an independent variable. By compiling a MATLAB program of the constitutive model, the parameters were obtained, and the off-axial tensile test curves of PVC-coated fabrics were predicted. The constitutive model was compiled using the user-defined subroutine UMAT in ABAQUS, and the correctness of the model was verified by simulating a static loading test of the membrane structure under in-plane tension. The model shows a good performance in computation and the obtained results are also in good agreement with experimental data. These features enable the proposed model to be used in numerical calculations for membrane structures.

Analysis of Phase Transformation and Mechanical Properties of 55CrMo Steel during Induction Hardening

Abstract To optimize the parameters of induction hardening and improve the surface hardness distribution of ball screw, the effects of the induction heating temperature on the microstructure and mechanical properties of 55CrMo steel were investigated. The specimens were heated up to 800°C, 850°C, 900°C, 950°C, 1,000°C, or 1,100°C by the induction heating power supply. Microstructural characterization of specimens was performed using an optical microscope and a high-resolution scanning electron microscope. The volume fraction of the retained austenite was measured using an X-ray diffractometer. The mechanical properties were evaluated by a microhardness tester and an electronic universal testing machine. The results show that the volume fraction of martensite in the hardened specimen increases with the increasing of heating temperature. A mixed microstructure consisting of ferrite + pearlite, bainite, and martensite is produced because of the nonfully and nonuniform austenitic state of original microstructure as the heating temperature is at 800°C. A full martensite can be produced as the heating temperature is more than 850°C. The volume fraction of retained austenite in the hardened specimen is lower when the heating temperature is in the range of 850°C–950°C; nonetheless, the volume fraction of retained austenite increases, and the tensile strength of the specimen reduces with the increasing of the heating temperature when the heating temperature is more than 950°C. The 55CrMo steel has good microstructure and mechanical properties and can meet the requirements of ball screw when the induction heating temperature is in the range of 850°C–950°C.

An investigation of the mechanical properties and bonding mechanism of Ti/Al-laminated composites fabricated by ultrasonic consolidation

Foils such as 1100 aluminum and TC4 titanium were used as matrix materials for ultrasonic consolidation test of dissimilar metal materials, and the samples of Ti/Al-laminated composites were prepared. The effect of amplitude and static pressure on the interfacial bonding strength of Ti/Al foil was studied by adhesion test. The mechanical properties of Ti/Al-laminated composites were tested by electronic universal testing machine. The microstructure of Ti/Al foil interface was observed by transmission electron microscope. The results show that ultrasonic consolidation can achieve a good bonding interface of Ti/Al foil, and the bonding strength of the interface increases first and then decreases with the increase of static pressure, and increases monotonously with the increase of amplitude. The optimum adhesion strength is 58.08 N cm−1. The high temperature deformation constitutive model of Ti/Al-laminated composites is established and verified. The Ti/Al interface has metallurgical bonding, and the inner microstructure of Ti/Al matrix is obviously refined. The surface of titanium foil has formed nanocrystalline.

Experimental and numerical studies of perforated CFRP laminates under quasi-static tensile load

Mechanical properties and failure modes of perforated CFRP laminate specimens under quasi-static tensile load were studied by means of experimental test and numerical simulation. Tensile tests of perforated CFRP laminates were conducted on an INSTRON electronic universal testing machine, and the progressive damage model based on 2D Hashin failure criterion was established by using the ABAQUS/Explicit software. The results showed that the discrepancy of ultimate tensile load basis on experimental test and numerical simulation was acceptable, which was less than 6.0 %. The numerical simulation method and results provide a theoretical reference for the design and application of perforated CFRP laminates.

Experimental study on microstructure and mechanical properties of stalk for Glycyrrhiza Glabra

In this paper, a year-old stalk of Glycyrrhiza glabra was used as the research object. The electronic universal testing machine was used to test the mechanical properties of shearing and bending. The microstructure of the stalk of Glycyrrhiza glabra was observed with a microscope. Mechanical test research indicated that the shearing process included an elastic phase, a yield phase, and a plastic deformation phase. The bending process was divided into elastic deformation stage and plastic deformation stage. In addition, the shearing force, shearing energy, bending force and bending energy all increased with the increase in diameter. As the water content increased, the shearing force and bending force decreased at first, reached the minimum when the water content was about 45%, and then had an upward trend. The shearing energy increased with the water content, and the bending energy, decreased with the water content. The two test factors were statistically significant for both shearing and bending properties. The microscopic test results showed that the phloem, fiber, and pith constitute the microstructure of the licorice stalk. The linear regression model could reflect the correlation between the cross-sectional area of each part and the shearing force and bending force (P < 0.05). Through analysis, it was concluded that the change of the cross-sectional area of the stalk microstructure had an important influence on the mechanical properties of shearing and bending. The results can provide theoretical basis for the design of Glycyrrhiza Glabra stalk harvesting, crushing and processing equipment.

Physical and mechanical properties of hydroponic lettuce for automatic harvesting

To design an automatic harvesting machine for hydroponic lettuce (Lactuca sativa L.), physical and mechanical properties of hydroponic lettuce were investigated and analyzed. Moisture content of stem, root and leaf, geometric characteristics, pulling force, and root cutting force were studied for harvesting hydroponic lettuce. The pulling force was examined by a tensile experiment, while the root cutting force was investigated by a shear experiment on the electronic universal testing machine. The moisture content of hydroponic lettuce was obtained by direct drying. Experiment data were processed using regression analysis and mathematical statistics method. A regression equation and the law of numerical distribution were obtained. The results showed that the geometric size of different hydroponic lettuce had little difference, and the distribution of physical parameters was concentrated. Moisture content was found statistically similar in stem and root (around 91%), while the highest moisture content was found in the leaf of 95.73%. The root cutting force decrease with the increase of cutting speed and decrease with the cutting position move downward. The minimum average root cutting force in the experiment was 1.41 N. The average pulling force was 13 N. This study provides adequate theoretical support for the design of the automatic harvesting machine of hydroponic lettuce.

Influence of multipass high rotating speed friction stir processing on microstructure evolution, corrosion behavior and mechanical properties of stirred zone on AZ31 alloy

Abstract The influence of multipass high rotating speed friction stir processing (FSP) on the microstructure evolution, corrosion behavior, and tensile properties of the stirred zone (SZ) was investigated by EBSD, TEM, SEM, electrochemical workstation and electronic universal testing machine. The mean grain size of the SZ is significantly refined, and it increases with the increase of the processing pass. In addition to an obvious increase in the number, the distribution of β-Al12Mg17 precipitates also becomes more uniform and dispersed with increasing the processing pass. Compared with the as-received AZ31 alloy, the tensile properties of the SZ are hardly improved, but the corrosion resistances are significantly enhanced. The corrosion potential of the SZ prepared by 4-pass FSP is increased from −1.56 V for the unprocessed AZ31 alloy to −1.19 V, while the corrosion current is decreased from 1.55×10−4 to 5.47×10−5 A.

Meso-Damage Mechanism of Strength and Deformation Characteristics of Typical Sandstone in Xinwen Coalfield

Geotechnical engineering problems will cause asymmetric deformation of surrounding rock, which is not conducive to the stability of rock mass. In order to study the meso-damage mechanism of rock strength and deformation characteristics, taking three kinds of typical sandstone as examples, the meso structure images of sandstone were obtained by JSM-6510LV scanning electron microscope (SEM). According to the meso-structure images and fractal theory, MATLAB was compiled to calculate the fractal dimension of the meso-structure images of the three types of sandstone. The uniaxial compression test of sandstone is carried out by using the Shimadzu electronic universal testing machine. The mechanical parameters of three types of sandstone are obtained. By comparing the relationship between fractal dimension and mechanical parameters, the correlation between strength and deformation characteristics of sandstone and mesostructure is analyzed. The results show that sandstone has the characteristic of self-similarity. The fractal dimension of sandstone decreases with the increase in magnification. The macro-mechanical properties of sandstone are closely related to the meso-structure. The strength characteristics of sandstone are inversely proportional to the fractal dimension. The greater the uniaxial compressive strength and elastic modulus, the smaller the fractal dimension. The damage problem of sandstone can be characterized by critical damage value, which is proportional to the fractal dimension; the larger the fractal dimension, the more serious the internal damage of sandstone.

Surface modification and biotribological behavior of UHMWPE nanocomposites with GO infiltrated by ultrasonic induction.

In this study, we have innovatively proposed a method for surface modification of ultra-high molecular weight polyethylene (UHMWPE) artificial joint materials with graphene oxide (GO) infiltrated into UHMWPE substrate by ultrasonic induction. The mechanical properties of UHMWPE nanocomposites with GO infiltrated by ultrasonic induction were compared with that of GO mixed. The molecular structure, wettability, peak load, and bio-tribological behavior of GO/UHMWPE nanocomposites were studied using fourier transform infrared spectroscopy, contact angle measuring instrument, electronic universal material testing machine, tribometer, and profilometer, respectively. The results show that the ultrasonic-induction method can make GO adhere to UHMWPE surface well, and GO can significantly improve the wettability of UHMWPE substrate. When the ultrasound-inducted time is up to 12 hr, the wetting angle of the nanocomposites (12 h-GO/UHMWPE) is reduced to 65.24°, which is 20.51% lower than that of the pure UHMWPE. The peak load is 183 N, which is 20.22% higher than that of GO/UHMWPE prepared by the mixing method. The bio-tribological property of UHMWPE nanocomposites with GO infiltrated by ultrasonic induction for 12 hr (12 h-GO/UHMWPE) is the best, and its friction coefficient keeps more stable at a value of 0.0605 under the lubrication of calf serum, which is 11.81% lower than that of UHMWPE mixed with GO by a traditional method, and the wear rate is decreased to 3.25 × 10-5 mm3 N-1 m-1 .

Amphiphilic diblock copolymers inhibit the formation of encrustation on the surface of biodegradable ureteral stents in vitro and in vivo

Ureteral stents have been used to treat a variety of urinary diseases for decades. However, the complication of encrustation often impedes its therapeutic effectiveness and service after indwelling in human body. In the present study, in order to surmount this problem, amphiphilic block copolymer, methoxypoly (ethylene glycol)-b-poly (Ɛ-caprolactone) (mPEG-PCL), was used to endow poly (l-lactide-ran-Ɛ-caprolactone) (PLACL) with hydrophilicity by solvent blending. The hydrophilicity, degradability, anti-encrustation (both in vitro and in vivo) and biocompatibility of the developed ureteral stents were assessed using water contact angle, electronic universal material testing machine, SEM, EDS, ICP-OES, dynamic urinary circulation model and a rat model. A progressive increase in the water contact angle and degradation rate was observed with the increase in mPEG-PCL concentration from 1 % to 5 % w/w in the mPEG-PLACL blends. In addition, according to ICP-OES results, approximately 38.86 % Ca and 60.55 % Mg was inhibited after 7 days immersion in dynamic urinary circulation model. Also, in the seventh week of indwelling the developed ureteral stents in rat model, compared with the hydrophobic PLACL, 71 % Ca and 93 % Mg was inhibited. Moreover, histological evaluations showed that mPEG-PCL/PLACL blends decreased tissue inflammation with favorable biocompatibility. As a result, this developed hydrophilic ureteral stents had great potential to become an ideal urological medical device.

Influence of laser shock peening on surface integrity and tensile property of high strength low alloy steel

Laser Shock Peening (LSP) is a well-established surface treatment commonly used to improve mechanical properties of material's surfaces. To further understand the relationship between tensile property and fatigue life improvement of high strength low alloy steel in the LSP process, LSP treatment of 32CrNi high strength low alloy steel was carried out by YAG laser with pulse energy of 15 J, and tensile property was tested by electronic universal material testing machine. Surface morphology, residual stress and tensile fracture of the specimens before and after LSP were observed by white light interferometer (WLI), X-ray measuring apparatus and scanning electron microscope (SEM). Result shows that LSP did not change tensile strength of 32CrNi steel but cause yield characteristic transform from obvious yield point to no yield phenomenon which is the only factor benefiting fatigue life, indicating that the increment of fatigue life was probably related to the disappearance of yield phenomenon. Formation mechanisms of tensile fractures and yield phenomenon induced by LSP at room temperature were also discussed and completely revealed. Deeper compressive residual stress and flat grains contributed to the transition of yield characteristic and lower elongation rate of 32CrNi steel subjected to LSP.

Deformation and energy absorption properties of cenosphere/aluminum syntactic foam-filled circular tubes under lateral quasi-static compression

Cenosphere/aluminum syntactic foam filled thin-walled tubes were prepared by inserting aluminum matrix syntactic foams reinforced with three kinds of industrial fly ash cenospheres with different average particle sizes (150μm, 200μm and 300μm) into empty steel tubes. In order to investigate the response of syntactic foam-filled tubes under lateral compression, quasi-static compression experiments were performed on thin-walled empty tubes, cenosphere/aluminum syntactic foam cylinders and cenosphere/aluminum syntactic foam-filled tubes by electronic universal material testing machine. LS-DYNA finite element software was used to verify and numerically predict the mechanical properties and energy absorption performance of foam-filled tubes. The results showed that the foam-filled tube exhibits a deformation mode of six plastic hinges under lateral compression. The initial peak load and specific energy absorption of the foam-filled tube increase with the decrease of the average particle size of cenospheres. The tube wall has obvious restraint effect on the filler, but the increase of the tube wall thickness will reduce the energy absorption capacity of the whole foam-filled tube.

Removal of anionic dye Congo red from aqueous environment using polyvinyl alcohol/sodium alginate/ZSM-5 zeolite membrane

In this study, a novel PVA/SA/ZSM-5 zeolite membrane with good regeneration capacity was successfully prepared by solvent casting technique. The properties of the membranes were assessed by employing different characterization techniques such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), optical microscopy (OP), thermogravimetric analysis (TGA), contact angle and universal testing machine (UTM). XRD, TGA and UTM results revealed that the crystallinity and thermo-mechanical performance of the membrane could be tuned with zeolite content. The successful incorporation of zeolite into the polymer matrix was confirmed by FT-IR, SEM and OP analysis. The adsorption ability of the as-prepared membrane was evaluated with a model anionic dye, Congo red. Adsorption studies show that the removal efficiency of the membrane could be tuned by varying zeolite content, initial concentration of dye, contact time, pH and temperature. Maximum dye adsorption (5.33 mg/g) was observed for 2.5 wt% zeolite loaded membrane, at an initial dye concentration of 10 ppm, pH 3 and temperature 30 °C. The antibacterial efficiency of the membrane against gram-positive (Staphylococcus aureus) and gram-negative bacteria (Escherichia coli) was also reported. The results show that membrane inhibits the growth of both gram-positive and gram-negative bacteria. The adsorption isotherm was studied using two models: Langmuir and Freundlich isotherm. The results show that the experimental data fitted well with Freundlich isotherm with a high correlation coefficient (R2 = 0.998). Meanwhile, the kinetic studies demonstrate that pseudo-second-order (R2 = 0.999) model describe the adsorption of Congo red onto PVA/SA/ZSM-5 zeolite membrane better than pseudo-first-order (R2 = 0.972) and intra particle diffusion model (R2 = 0.91). The experimental studies thus suggest that PVA/SA/ZSM-5 zeolite could be a promising candidate for the removal of Congo red from aqueous solution.