Strong Retardation Research Articles

Facile infiltration of polyethyleneimine as a strong CO2 retardant in scalable dual-polymer membranes for H2/CO2 separation

Successful pre-combustion CO2 capture from synthetic gas for H2 production requires effective membrane separation technology. While polymer-based membrane materials offer promising industrial scalability, they generally lack a sufficiently high H2/CO2 selectivity to make this process energy-efficient. In this work, we have designed a scalable dual-polymer blend membrane consisting of sulfonated polyphenylsulfone (sPPSU) and polybenzimidazole (PBI), and then being infiltrated with amine-rich poly(ethyleneimine) (PEI) molecules as effective CO2 retardants to substantially elevate the H2/CO2 selectivity. PEI molecules were infiltrated into the dual-polymer matrix via solution-treatment to crosslink the polymer network and retard CO2 transport using its amine-rich nature. The PEI infiltration dramatically increased the H2/CO2 selectivity of the dual-polymer matrix from 4.6 to up to 59.3 while maintaining a minimum H2 permeability of 2.49 Barrer at a low temperature of 35 °C, which not only surpasses the Robeson upper bound but also places the newly developed membrane among the best-performing polymer-based membranes. More importantly, the solution infiltration of PEI incurs no phase segregation, maintaining the polymer mechanical robustness, which is crucial for industrial scaling. This study offers promising opportunities to develop three-polymer membrane systems for H2/CO2 separation using synergistic polymer blends and CO2-retarding molecules.

The impact of surface-impregnated versus support-dispersed Fe in Fe–Ni/γ-Al2O3 catalysts for partial oxidation of methane: Insights into the effect of Fe incorporation method on coking and on the reaction mechanism

Two sets of Fe-modified Ni/γ-Al2O3 catalysts were prepared and tested in partial oxidation of methane. In one set, Fe was co-impregnated on the surface (NiFe) and in the other set Fe was incorporated in the support bulk (Ni/Fe). The two types showed significantly different coking resistance and performance. While Fe well dispersed in the support bulk significantly enhanced coking resistance, Fe co-impregnated with Ni on the surface enhanced the rate of coke deposition on the catalysts’ surfaces. The impact of Fe in the Ni/Fe catalysts is referred to its partially reduced ions (Fe2+) in redox reactions, and to the Ni-support strong interaction retarding the coke formation pathways. On the contrary, carbon formation on the NiFe catalysts is referred to the formation of Ni–Fe alloy particles which may block Ni active sites and can promote cracking of methane as well as CO molecules resulting in higher rates of coking.

Enhance the fire safety of epoxy resin using ammonium polyphosphate flame retardant with the sandwich structure containing catalytic carbon formation function

AbstractAmmonium polyphosphate (APP) is often used to construct intumescent flame retardant systems together, but it is faced with the problem of adding too much flame retardant. This paper envisions the construction of a modified APP flame retardant (TR@ZIFAPP) with a sandwich structure by the method of covering, which, in order to endow APP flame retardant with better flame retardant effect. By constructing a metal catalytic layer and a triazine carbon formation layer, the modified APP flame retardant has both catalytic carbon formation and phosphorus–nitrogen synergistic flame retardant functions. TR@ZIFAPP is expected to be used in flame‐retardant polymer composites with low addition requirements, adding it to epoxy resin (EP) reveals that the TR@ZIFAPP flame retardant could achieve the optimal flame retardant effect when the addition amount was only 3 wt%. The UL‐94 rating reached V‐0 grade, and the two off‐fire auto‐ignition time levels were only 0.7 s. The analysis of its flame retardant mechanism showed that the flame retardant in EP was mainly through the rapid formation of carbon to isolate oxygen and dilute the flammable gas to reach a strong flame retardant effect.

Spatial distribution characteristics and degradation mechanism of microorganisms in n-hexadecane contaminated vadose zone

The damage caused by petroleum hydrocarbon pollution to soil and groundwater environment is becoming increasingly significant. The vadose zone is the only way for petroleum hydrocarbon pollutants to leak from surface into groundwater. The spatial distribution characteristics of indigenous microorganisms in vadose zone, considering presence of capillary zones, have rarely been reported. To explore the spatial distribution characteristics of indigenous microorganisms in vadose zone contaminated by petroleum hydrocarbons, a one-dimensional column migration experiment was conducted using n-hexadecane as characteristic pollutant. Soil samples were collected periodically from different heights during experiment. Corresponding environmental factors were monitored online. The microbial community structure and spatial distribution characteristics of the cumulative relative abundance were systematically analyzed using 16S rRNA sequencing. In addition, the microbial degradation mechanism of n-hexadecane was analyzed using metabolomics. The results showed that presence of capillary zone had a strong retarding effect on n-hexadecane infiltration. Leaked pollutants were mainly concentrated in areas with strong capillary action. Infiltration and displacement of NAPL-phase pollutants were major driving force for change in moisture content (θ) and electric conductivity (EC) in vadose zone. The degradation by microorganisms results in a downward trend in potential of hydrogen (pH) and oxidation-reduction potential (ORP). Five petroleum hydrocarbon-degrading bacterial phyla and 11 degradable straight-chain alkane bacterial genera were detected. Microbial degradation was strong in the area near edge of capillary zone and locations of pollutant accumulation. Mainly Sphingomonas and Nocardioides bacteria were involved in microbial degradation of n-hexadecane. Single-end oxidation involved microbial degradation of n-hexadecane (C16H34). The oxygen consumed, hexadecanoic acid (C16H32O2) produced during this process, and release of hydrogen ions (H+) were the driving factors for reduction of ORP and pH. The vadose zone in this study considered presence of capillary zone, which was more in line with actual contaminated site conditions compared with previous studies. This study systematically elucidated vertical distribution characteristics of petroleum hydrocarbon pollutants and spatiotemporal variation characteristics of indigenous microorganisms in vadose zone considered presence of capillary zone. In addition, the n-hexadecane degradation mechanism was elucidated using metabolomics. This study provides theoretical support for development of natural attenuation remediation measures for petroleum-hydrocarbon-contaminated soil and groundwater.

Statistical approach on optimizing heat transfer rate for Au/Fe3O4-blood nanofluid flow with entropy analysis used in drug delivery system

The current study focuses on utilizing an advanced statistical concept for optimizing rate of heat transfer in a micropolar nanofluid flow within a squeezing channel. The study employs RSM to plan experiments and analyze the role of distinct constraints on HT performance. Moreover, the inclusion of dissipative heat due to the interaction of applied magnetic field along with thermal radiation enriches the study. The proposed designed model is transformed to its non-dimensional form using appropriate similarity rules and then numerical simulation is presented to solve the set of formulated problem. However, the irreversibility process of the system is assessing by incorporating the entropy analysis. The validation along with the characteristic of the contributing factor is presented via the solution of the present design. The outcomes reveals that enhanced volume fraction generally increases viscosity of the fluid which resulted in a strong retardation in the fluid velocity. However, the entropy rate augments with an increasing Br. The results provide the optimal conditions for HTR for both of the nanofluids, which is relevant for applications in drug delivery systems. The advancement in optimizing HTR using RSM and the regression analysis using ANOVA (analysis of variance) may have potential implications for biomedical engineering.

Corrosion Behaviors of Ni–Cr Alloys in O2, H2O and H2O + O2 Gases at 700°C and the Effect of Temperature

Pure nickel and four binary Ni–Cr (5, 10, 20 and 30 wt%) alloys were exposed to Ar–20O2, Ar–20O2–20H2O and Ar–20H2O (vol.%) at 700°C. In dry and wet O2, three Ni–Cr alloys (5, 10 and 20 wt%) formed a three-layered structure: an external NiO layer, an inner oxide layer of NiO + Cr2O3 and an internal oxidation zone (IOZ) with Cr2O3 dispersed. The Ni–30Cr alloy formed a continuous chromia layer, with locally outer NiO islands. In pure water vapor, all alloys underwent internal oxidation, nickel metal expulsion and NiO formation. Compared with the results at 650°C, increasing the temperature to 700°C did not alter the morphology of the oxide scale, but enhanced the scale growth kinetics. A significant difference between these two temperatures was that the strong retarding effect of water vapor on NiO formation in oxygen at 650°C became insignificant at 700°C. However, in water vapor only condition, NiO formation remained much slower at both temperatures. The effects of water vapor and oxygen partial pressure on NiO formation of different alloys and the effect of temperature on scale growth kinetics and morphology were discussed.

Insight into the role of β-cyclodextrin on the hydration of white Portland cement

Impacts of β-cyclodextrin (β-CD) on hydration of white-Portland-cement (WPC) are studied by calorimetry, ICP-OES, TOC, TG, XRD and time domain NMR. Strong retardation effect of β-CD has been confirmed in both WPC and pure C3S pastes. Much stronger retardation in C3S pastes suggests the aluminate phases (C3A and ettringite) in WPC pastes mitigates the retardation effect of β-CD on C3S hydration, probably by adsorbing β-CD molecules and thus reducing β-CD concentration in the aqueous solution. Together with precipitation experiments of pure CH and C-S-H, it is concluded that β-CD remaining in the aqueous solution of the WPC pastes blocks CH and C-S-H formation and the induction period is remarkably extended as additional time is needed to clean up the aqueous solution by slowly formed hydrates e.g., AFt. NMR results suggest high dosage of β-CD promotes C-S-H precipitation directly in aqueous solution in acceleration period, besides the surface of cement grains.

Experimental investigation on effects of polyaniline-modified-lignin on cement-based materials: Strength, hydration and dispersion

The application of lignin dispersants in cementitious materials has been limited due to its strong retarding effect on cement hydration. In this study, polyaniline modified lignin (PL) was prepared to be as a new lignin additive to increase the dispersion of cement system and maintain good mechanical properties of cementitious materials. This investigation systematically revealed that different contents of PL (0%, 0.5%, 1.0%, 2.0%) had various effects on the early hydration, the work performance and the microstructure of cement paste and mortar. Appropriate dosage of PL was beneficial to achieve better dispersion and improve the fluidity of cement system. The retarding effect on cement hydration was significantly reduced by PL, compared to unmodified lignin. When the content of PL was 0.5% and 1.0%, the mechanical properties of the mortar was maintained as well as mortar without PL. However, excessive content of PL (2.0%) decreased the flexural strength and compressive strength significantly. XRD and TG tests exhibited that no new hydration products were generated and the formation of calcium hydroxide was inhibited after the addition of PL. Besides, SEM and MIP results showed that low dosage of PL could decrease the porosity due to the filling effect. When the dosage of PL in cement exceeds 2.0%, the structure was more loose and porous, attributed to the delayed hydration and air entertainment. The dispersion mechanism was also discussed and ascribed to electrostatic repulsion caused by PL adsorbed on the surface of cement particles and the steric effect due to the branched chains of PL. This study provides a new idea for high-value application of lignin and the promotion of low-carbon building materials by using renewable resources.

Effect of using sugar and gypsum as a retarder on concrete properties in Omani weather

This study deals with the retardation of cement setting time and workability in hot weather such as in Sultanate of Oman. Combination of sugar and gypsum was used as retarders. The aim of this study was to investigate the effect of retarders on consistency, setting time of ordinary Portland cement (OPC) paste and compressive strength of concrete cubes after 7 days of curing. OPC paste with a water cement ratio 0.4 to 0.5 was prepared by mixing 500 grams of ordinary Portland cement, a fixed amount of sugar of 0.02% by weight of cement with a combination of different gypsum of 1, 2, 3, 4, and 5% by weight cement and water. Sugar has a strong retarding effect, and this effect, controlled by Gypsum, can shorten the long setting time caused by sugar. The setting time of cement paste was reduced from 5.5 hours to 3 hours with an increase in Gypsum at a fixed amount of sugar. At a constant sugar content, increasing the gypsum content reduced the compressive strength from 31.5 MPa to 30.92 MPa.

Synthesis and performance evaluation of polycarboxylate dispersant for oil well cement

Although polycarboxylate (PCE) is widely used in the concrete industry, its application in cementing engineering is restricted owing to its poor temperature resistance and strong retardation effect on oil well cement. Hence, in this study, a sulfonated polycarboxylate (SPC) dispersant suitable for oil well cement was synthesised by performing free-radical polymerisation using ω-hydroxy polyethylene glycol ether, acrylic acid, and 2-acrylamide-2-methylpropanesulfonic acid as raw materials, and its molecular structure was characterised by using Fourier transform infrared spectroscopy, gel permeation chromatography, and 1H-nuclear magnetic resonance spectroscopy. The rheological properties, thickening curve, and compressive strength of the SPC cement slurry were studied. The hydration products of the SPC cement slurry were analysed by using X-ray diffraction, and the microstructure of the cement stone was examined by using mercury intrusion porosimetry and scanning electron microscopy. The results showed that SPC has good dispersion performance and can effectively reduce the particle size and improve the workability and rheological properties of cement slurry. In addition, SPC has a less retardation effect on the cement slurry than conventional PCE, which can reduce the number of detrimental pores in cement stone, increase compactness, and improve the early compressive strength of cement stone.

Loss of MYB34 Transcription Factor Supports the Backward Evolution of Indole Glucosinolate Biosynthesis in a Subclade of the Camelineae Tribe and Releases the Feedback Loop in This Pathway in Arabidopsis.

Glucosinolates are specialized defensive metabolites characteristic of the Brassicales order. Among them, aliphatic and indolic glucosinolates (IGs) are usually highly abundant in species from the Brassicaceae family. The exceptions this trend are species representing a subclade of the Camelineae tribe, including Capsella and Camelina genera, which have reduced capacity to produce and metabolize IGs. Our study addresses the contribution of specific glucosinolate-related myeloblastosis (MYB) transcription factors to this unprecedented backward evolution of IG biosynthesis. To this end, we performed phylogenomic and functional studies of respective MYB proteins. The obtained results revealed weakened conservation of glucosinolate-related MYB transcription factors, including loss of functional MYB34 protein, in the investigated species. We showed that the introduction of functional MYB34 from Arabidopsis thaliana partially restores IG biosynthesis in Capsella rubella, indicating that the loss of this transcription factor contributes to the backward evolution of this metabolic pathway. Finally, we performed an analysis of the impact of particular myb mutations on the feedback loop in IG biosynthesis, which drives auxin overproduction, metabolic dysregulation and strong growth retardation caused by mutations in IG biosynthetic genes. This uncovered the unique function of MYB34 among IG-related MYBs in this feedback regulation and consequently in IG conservation in Brassicaceae plants.

Supercritical carbon dioxide foaming for ultra-low dielectric loss perfluorinated foam

Microelectronic is developing towards high frequency (GHz) and high speed (Gpbs), putting forward high requirements for low dielectric materials. The most efficient method for fabricating low dielectric materials is the incorporation of air into matrix via supercritical CO2 foaming. Herein, a low dielectric thermoplastic perfluorinated polymer is selected to be the matrix and another low dielectric perfluorinated polymer which is capable to form in-situ nanofibrils is selected to regulate the matrix viscoelasticity. Supercritical CO2 foaming method is then applied to introduce a large amount of low dielectric air into nanofibrill modified perfluorinated polymer. Owing to supercritical CO2 as a residue-free foaming agent (residue impurities in matrix originated from foaming agent would increase dielectric loss significantly at GHz) and its strong interaction with perfluorinated polymer (ensure large expansion ratio of the obtained foams to introduce a large amount of low dielectric air in matrix), the lowest dielectric loss of 0.00015 (among the existing polymeric materials) is then obtained by supercritical CO2 foaming of in-situ nanofibril modified perfluorinated polymer. Furthermore, the hydrophobic and oilphobic properties of the perfluorinated polymer were enhanced by supercritical CO2 foaming to form a cellular structure; simultaneously, the corrosion resistance to strong alkali and V0 flame retarding properties of the ultra-low dielectric foam were maintained resulted from the perfluorinated cell walls. Therefore, such superior comprehensive performance of this ultra-low dielectric perfluorinated foam made from supercritical CO2 foaming enables it the best alternative for the next-generation high-frequency (GHz to THz) and high-speed (sub Tbps) signal transmission substrate in electronics.

Theoretical analysis of modified non-Newtonian micropolar nanofluid flow over vertical Riga sheet

The main purpose of this work is to study the steady incompressible second-grade micropolar fluid flow over a nonlinear vertical stretching Riga sheet. Velocity slip and zero mass flux are considered at the solid surface of Riga shape such that the friction of nanoparticle maintains itself with strong retardation. The influence of Lorentz forces produced by the Riga plate is an important aspect of the study. The influences of thermophoresis and Brownian motion under the heat generation and e bouncy forces are studied on the nonlinear vertical Riga sheet. The mathematical model is developed under the flow assumptions. The mathematical model in terms of partial differential equations is formed by implementing the boundary layer approximations. The partial differential equations are further reduced to ordinary differential equations by means of suitable transformations. The ordinary differential equations are solved through the numerical procedure. The variations in the horizontal movement of nanofluid, thermal distribution and concentration distribution of the nanoparticle have been noted for different fluid parameters. The values of velocity profile and temperature profile are larger in the case of injection ([Formula: see text] as compared to suction ([Formula: see text]). The values of concentration distribution are smaller in the case of injection ([Formula: see text] as compared to suction ([Formula: see text]. The validation of this analysis with decay literature is provided in the form of tables.

Effects of prior austenite grain size on reversion kinetics of different crystallographic austenite in a low carbon steel

The effects of prior austenite grain (PAG) size on reversion kinetics of different crystallographic austenite (γ) with acicular and globular morphologies in a low carbon steel with the structure of pre-tempered martensite have been studied. It is unexpected that the coarse PAG (C-PAG) shows a strong inhibition on the reversion kinetics of globular γ, while a weak influence on that of acicular γ. Intragranular globular γ is hardly to be formed in the low carbon steel, and the grain boundary (GB) ones are dominantly formed. C-PAG provides low-density PAGBs for GB globular γ formation, leading to slower reversion kinetics. Theoretical analyses revealed that the low-density and fine cementite particles result in a low nucleation potency for globular γ thus less intragranular ones were formed. On the other hand, C-PAG leads to coarse martensite structure, which was expected to have a strong retardation on the reversion kinetics of acicular γ. However, acicular γ is mainly nucleated at block boundaries for the cases of (Fine) F-PAG, and it is almost equally nucleated at block and sub-block boundaries for C-PAG. This decreased the differences in nucleation density and growth kinetics of the acicular γ between the C-PAG and F-PAG, and the influences of PAG size on the reversion kinetics is weakened.

The Hibiscus extract Potential in Inhibiting Anodic Dissolution of Copper

Copper electro dissolution in H3PO4 acid is examined in solution containing different concentration of Hibiscus extract (Hibiscuss abdariffa). Potential of anode limiting current relation were computed and estimate of gently raising Hibiscus extract concentration (500-2000 ppm), The results reveal that Hibiscus extraction as a natural product has strong retardation behavior ranging from 24.5 � 42.1 % and the thermodynamic factors, adsorption isotherm and dimensionless parameters were given. Copper dissolution behavior in Hibiscus extract containing solution was investigated below ordinary convection and rotating cylinder electrode (RCE) as a compulsory convection. The rotating cylinder electrode RCE speed was investigated. The limiting current increases with increasing rotation, which indicates that the anodic corrosion is a diffusion-controlled process. The limiting current were reduced with raising extract plant concentration and raise with amplifying temperature from 293 -313 K). The activation energy values established which reaction rate was controlled via diffusion. Hibiscus extract adsorption follow Flory Huggins and kinetic thermodynamic models. The result at several circumstance was commanded via dimensionless correlations Sherwood (Sh), Schmidt (Sc) and Reynolds (Re) numbers.

Pembuatan Sabun Cair Berbasis Minyak Kelapa Dengan Proses Saponifikasi Untuk Menghambat Pertumbuhan Bakteri Dengan Penambahan Minyak Zaitun (Pure Olive Oil) Untuk Pelembap Kulit

This research was conducted to produce and determine liquid soap products that function as skin moisturizers and can inhibit microbial growth. In the process of making this liquid soap, two formulas are used, namely formula 1 which is made from coconut oil and alkali of KOH with the addition of olive oil and formula 2 which is made from coconut oil and alkali of KOH without the addition of olive oil . The manufacture of liquid soap in this study was carried out experimentally using the hot process method. Organoleptic testing with parameters of foam, skin dryness, and skin moisture was carried out using analytical observational and questionnaire methods involving fifteen correspondents. Testing the inhibition of microbial growth using Staphylococcus aureus bacteria contamination. The results obtained from this research are liquid soap formula 1 and formula 2 have a lot of foam and a very strong microbial growth retardant power, liquid soap formula 1 can moisturize the skin, and liquid soap formula 2 dries the skin. The results of this research, God willing, will be a reference for the author to continue this research to the stage of perfection and it is hoped that the results of this research can also be useful for the ummah and the nation in realizing a healthy life .

Effect of hydrophilic–lipophilic balance values of sucrose esters on cornstarch retrogradation

AbstractBackground and objectivesThe relationship between the different hydrophilic–lipophilic balance (HLB) values of sucrose esters and the retardant effect on the cornstarch retrogradation have not been investigated. The present research was aimed to evaluate the effects of the sucrose esters with different HLB values on the retrogradation properties by analyzing the changes in the crystalline structure and water mobility of cornstarch gels after storage.FindingsAll sucrose ester with HLB value (2–15), especially the HLB 15, could retard the long‐term retrogradation of cornstarch gels. After being stored for the same time, the retrograded cornstarch gels containing sucrose ester of HLB 15 had the lowest hardness, relative crystallinity, and R1047/1022. Compared with the additive‐free cornstarch, the hardness, relative crystallinity, and R1047/1022 of cornstarch with sucrose ester of HLB 15 were significantly decreased by 142 g, 8.66%, and 0.41, respectively, after being stored at 4°C for 7 days.ConclusionsSucrose ester with a high HLB value showed a strong retardant effect on the starch retrogradation.Significance and noveltyThese results suggested that sucrose ester with higher HLB value might be a more effective additive in retarding the retrogradation of cornstarch gels.

Assessment of the Performances of Carboxylic Acid Monomers as Fluid Loss Additives for Oil-Well Cement

The application of polycarboxylic acid as a fluid loss additive for cement (i.e., a substance specifically designed to lower the volume of filtrate that passes through the cement) can prolong the thickening time of cement slurries. Given the lack of data about the effects of carboxylic acid monomers as possible components for the additives traditionally used for oil-well cement, in this study different cases are experimentally investigated considering different types of these substances, concentrations, temperatures, and magnesium ion contamination. The results demonstrate that itaconic acid has a strong retarding side effect, while maleic and acrylic acids have similar influences on the thickening time of the cement slurry. The rheological properties of the cement slurry tend to deteriorate when the carboxylic acid monomer content in the fluid loss additive is increased to 40%. If the temperature exceeds 80°C, there is a significant decrease in the related impact on the thickening duration. With an increase in the intrusion of magnesium ions to >0.5%, both the rheological properties of the cement slurry and the thickening time are affected in a negative way.

Water dynamics in the hydration shell of hyper-branched poly-ethylenimine.

We performed THz and GHz dielectric relaxation spectroscopy to investigate the reorientational dynamics of water molecules in the hydration shell of amphiphilic hyper-branched poly-ethylenimine (HPEI). Four Debye equations were employed to describe four types of water in the hydration shell, including bulk-like water, under-coordinated water, slow water (water molecules hydrating the hydrophobic groups and water molecules accepting hydrogen bonds from the NH2 groups) and super slow water (water molecules donating hydrogen bonds to and accepting hydrogen bonds from NH groups). The time scales of undercoordinated and bulk-like water show a slight decline from 0.4 to 0.1 ps and from 8 to 2 ps, respectively. Because of hydrophilic amino groups, HPEI molecules exhibit a strong retardation effect, where the time scales of slow and super slow water increase with concentration from 17 to 39.9 ps and from 88 to 225 ps, respectively.

Unsteady magnetohydrodynamic couple stress fluid flow from a shrinking porous sheet: Variational iteration method study

AbstractMotivated by magnetic polymer manufacturing applications, the present research article examines theoretically the hydromagnetic boundary layer flow of an electrically conducting non‐Newtonian couple stress fluid due to a transient shrinking (contracting) porous sheet. The conservation partial differential equations for mass and momentum are rendered into a fifth‐order nonlinear ordinary differential equation via similarity transformations with associated boundary conditions. A semi‐analytical/numerical scheme employing Lagrangian multipliers and known as the variational iteration method (VIM) is implemented to solve the ordinary differential boundary value problem. Validation of the solutions is conducted by benchmarking against earlier Newtonian studies and very good agreement is achieved. A detailed assessment of the impact of couple stress (rheological), unsteadiness, magnetic body force parameter, and wall transpiration (suction/injection) parameter on flow characteristics is conducted with the aid of graphs. A significant deceleration in the flow is computed with increasing injection (acceleration is caused with greater suction) and acceleration is induced with higher unsteadiness parameter values. Increasing magnetic field (higher magnetic number) generates flow acceleration, rather than the customary deceleration, due to the shrinking sheet dynamics. A stronger couple stress effect manifests in strong retardation in the boundary layer flow and an increase in momentum (hydrodynamic|) boundary layer thickness. VIM demonstrates excellent convergence and accuracy and shows significant promise in studying further magnetic polymer fabrication flow problems.