Content Of Epoxy Groups Research Articles

Enhancing anticorrosive performance of epoxy‐based ZnO nanocomposite coatings via 3‐(trimethoxysilyl)propyl methacrylate modification

AbstractThe influence of 3‐(trimethoxysilyl)propyl methacrylate (TMSPM) on the properties of epoxy‐based ZnO nanocomposite coatings was investigated, considering its impact on both modified ZnO nanoparticles (NPs) and epoxy resin matrix. FTIR analysis revealed that TMSPM‐modified epoxy resin (mEP) exhibited lower hydroxyl group and epoxy group content compared to the initial epoxy resin (EP). Furthermore, the obtained results demonstrated that epoxy‐based coatings incorporating modified ZnO NPs (m‐ZnO NPs) displayed superior mechanical properties compared to those of the sample filled with the unmodified ZnO NPs (u‐ZnO NPs). However, the mechanical properties of epoxy‐based coatings loaded with m‐ZnO NPs were found to be lower than those of coatings comprising mEP resin and m‐ZnO NPs. The arrangement of anticorrosion performance of coatings followed a similar pattern. SEM analysis of the cross‐cut surface revealed better dispersion of m‐ZnO NPs compared to the u‐ZnO NPs, although small gaps were observed among the m‐ZnO NPs and the epoxy matrix. The SEM images of coatings based on mEP and m‐ZnO NPs indicated a tighter structure. This structural characteristic is considered the main reason for the highest anticorrosion performance observed in the investigated coatings incorporating both mEP and m‐ZnO NPs.

Tailoring compatibility and mechanical properties of cold-mixed epoxy asphalt via external epoxy group content manipulation

The compatibility of cold-mixed epoxy asphalt (CEA) significantly influences its mechanical properties, primarily mediated by the epoxy group content within CEA. However, the feasibility and mechanisms for regulating the external epoxy group content to achieve optimal performance have yet to be explored thoroughly. Herein, soybean oil, epoxidized soybean oil, and epoxy-terminated hyperbranched epoxy resin (EHER) were used to construct CEA with different external epoxy group contents, and their effects and mechanisms on the compatibility and mechanical properties of CEA were investigated based on experiments and molecular dynamics simulation. Our findings suggest that maintaining an external epoxy group content between 8.4%∼11.4% in the CEA blend and below 12.17% in the cured CEA is crucial. These criteria can be met by adding no more than 5 wt% EHER. CEA with 3 wt% EHER exhibited the most balanced compatibility and mechanical properties, characterized by a pot life of 91 min, a tensile strength of 5.02 MPa, an elongation at break of 61.3%, and a tensile toughness of 1.58 MJ/m3. The presence of external epoxy groups increased the cohesive energy density and the solubility parameter difference between epoxy resin and asphalt prior to curing, forming a "sea-island" structure with varying particle sizes, primarily comprising small-sized particles. This structure was preserved post-curing, establishing a stable system with minor energy alterations. Simultaneously, EHER enhanced the molecular rigidity and uniformity of CEA, thereby improving its mechanical properties. It is recommended to relate epoxy group content in CEA blends with indicators of compatibility and mechanical properties, enabling better prediction.

Effects of maleic anhydride on the moisture crosslinking of EVM‐GMA grafted with amino silane

AbstractMoisture crosslinking would be a good substitution to cure ethylene‐vinyl acetate‐glycidyl methacrylate rubber (EVM‐GMA) due to the characteristics of low cost and environmental friendliness. Our previous study found amino silane grafted onto EVM‐GMA with low degree due to the low epoxy group content in rubber matrix. Consequently, the moisture crosslinking density of rubber compound is low. So, it is necessary to find an effective method to improve the moisture crosslinking density of EVM‐GMA. In this paper, EVM‐GMA grafted with γ‐aminopropyltriethoxysilane and maleic anhydride (EVM‐GMA‐g‐APTES/MAH) composites were prepared by melt blending, and then the moisture crosslinking of composites was achieved in a 90°C water bath with the aid of catalyst dibutyltin dilaurate (DBTL). The grafting of MAH onto the EVM‐GMA molecular chain and its reaction with amino silane were confirmed by differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT‐IR). Furthermore, the moisture crosslinking density of the samples before and after grafting MAH was compared. The results indicated that the moisture crosslinking density of the grafted MAH was higher than that of the unmodified rubber, thus achieving better overall mechanical properties. Therefore, grafting MAH was a feasible way to improve the moisture crosslinking density of EVM‐GMA with the existence of silane.

Highly toughened poly (lactic acid)/poly (butylene adipate-terephthalate) blends in-situ compatibilized by MMA-co-GMA copolymers with different epoxy group content

Poor compatibility limits the wide application of biodegradable poly (lactic acid)/poly (butylene adipate-terephthalate) (PLA/PBAT) blends in packaging industry. How to prepare compatibilizers with high efficiency and low cost by simple methods is a challenge. In this work, methyl methacrylate-co-glycidyl methacrylate (MG) copolymer with different epoxy group content are synthesized as reactive compatibilizers to resolve this issue. The effects of glycidyl methacrylate and MG contents on phase morphology and physical properties of the PLA/PBAT blends are systematically investigated. During melt blending, MG migrates to the phase interface, and then grafts with PBAT to form PLA-g-MG-g-PBAT terpolymers. When the molar ratio of MMA and GMA in MG is 3:1, the reaction activity of MG with PBAT is the highest and the compatibilization effect is the best. When the M3G1 content is 1 wt%, the tensile strength and the fracture toughness are increased to 37. 1 MPa and 120 MJ/m3, which increase by 34 % and 87 %, respectively. The size of PBAT phase decreases from 3.7 μm to 0.91 μm. Therefore, this work provides a low-cost and simple method to prepare the compatibilizers with high efficiency for the PLA/PBAT blend, and provides a new basis for the design of epoxy compatibilizers.

Metal chelate-epoxy bifunctional membranes for selective adsorption and covalent immobilization of a His-tagged protein

The preparation and application of metal chelate-epoxy bifunctional membranes for the selective adsorption and covalent immobilization of His-tagged protein switch RG13 were shown in this study. By controlling the concentration of iminodiacetic acid (IDA) and reaction time during the conjugation of IDA on to the epichlorohydrin-activated regenerated cellulose membrane, 5 metal chelate-epoxy bifunctional membranes, with degrees of IDA conjugation in the range of 20%-81%, were prepared. The bifunctional membrane with an IDA conjugation degree of 30%, designated as BFM30, exhibited a sound adsorption capacity of 0.203mg/cm2 with a relatively high content of epoxy groups for covalent immobilization, were selected. The concomitant selective adsorption and covalent immobilization of the His-tagged RG13 with BFM30 were carried out by 2-h incubation for protein adsorption and subsequent 16-h incubation for covalent immobilization after the removal of undesired proteins with wash buffer, giving an immobilization yield of 63% and a global activity yield 40%. The RG13 immobilized on the metal chelate-epoxy bifunctional membrane exhibited superior operational stability in a repeated batch process, retaining 94% of its initial activity after 20 cycles. The employment of the bifunctional membranes could significant facilitate enzyme immobilization processes by eliminating the need for prior protein purification.

Kinetic features of polymerization of epoxy resin modified by silicon‐containing additives and mineral fillers

AbstractIn this article, we study the process of polymerization of a modified ED‐20 epoxy binder under conditions of highly filled systems. It is found that modifying additives affect the process of polymerization of the binder, increasing the degree of conversion of epoxy groups of ED‐20 resin, speeding up the process of polymerization, and increasing the exothermic effect of the reaction. Curing in the presence of a modifying silicon‐containing additive takes place in a mode that promotes the formation of a more ordered structure, creating opportunities for relaxation of internal stresses and favorable conditions for the formation of an ordered microstructure. The equations sufficiently fitting the measured points of the concentration of epoxy groups are calculated. We obtain the kinetic curves of curing, which illustrate the process of heat release of the ED‐20 binder and the same system modified with mineral fillers. It is found that the heat release occurs more intensively when modifiers are introduced into the epoxy binder. It is derived that the experimental data of kinetics of heat release at considered time range can be sufficiently described by a parabolic equation.

Compatibility of epoxidized natural rubber and polyaniline blend

AbstractThe compatibility of binary blend of epoxidized natural rubber and polyaniline was investigated. Epoxidized natural rubber with 25 mol% of epoxy group content was prepared through epoxidation of deproteinized natural rubber in latex stage. Blends of epoxidized natural rubber and polyaniline with various ratios were prepared. The compatibility of the blends was examined through differential scanning calorimetry measurement and scanning electron microscopy observation. Obtained result showed that the presence of epoxy group significantly improved the compatibility of binary blends of epoxidized natural rubber and polyaniline blends. The compatibility significantly enhanced the electrical conductivity of epoxidized natural rubber/polyaniline blends.

Chemical and structural properties of reduced graphene oxide\u2014dependence on the reducing agent

Graphene oxide (GO) prepared from graphite powder using a modified Hummers method and reduced graphene oxide (rGO) obtained from GO using different reductants, i.e., sodium borohydride, hydrazine, formaldehyde, sodium hydroxide and L-ascorbic acid, were investigated using transmission electron microscopy, X-ray diffraction, Raman, infrared and electron spectroscopic methods. The GO and rGOs’ stacking nanostructure (flake) size (height x diameter), interlayer distance, average number of layers, distance between defects, elementary composition, content of oxygen groups, C sp3 and vacancy defects were determined. Different reductants applied to GO led to modification of carbon to oxygen ratio, carbon lattice (vacancy) and C sp3 defects with various in-depth distribution of C sp3 due to oxygen group reduction proceeding as competing processes at different rates between interstitial layers and in planes. The reduction using sodium borohydride and hydrazine in contrary to other reductants results in a larger content of vacancy defects than in GO. The thinnest flakes rGO obtained using sodium borohydride reductant exhibits the largest content of vacancy, C sp3 defects and hydroxyl group accompanied by the smallest content of epoxy, carboxyl and carbonyl groups due to a mechanism of carbonyl and carboxyl group reduction to hydroxyl groups. This rGO similar diameter to GO seems to result from a predominant reduction rate between the interstitial layers. The thicker flakes of a smaller diameter than in GO are obtained in rGOs prepared using remaining reductants and result from a higher rate of reduction of in plane defects.

Dispersion degree and sheet spacing control of graphene products via oxygen functionalities and its effect on electrical conductivities of P3HT-graphene composite coatings

Graphene products have been used as conductor filler in polymers matrix, resulting in a conductive composite for optoelectronic applications. In this work, the effect of oxygen content of reduced graphene oxide (rGO) products on its dispersion in poly(3-hexylthiophene) (P3HT) and the electrical properties of the P3HT-rGO composites is studied. Graphene oxides (GOs) with different concentrations of oxygen species were first prepared by a modified Tour method. Each GO product was reduced with the same amount of L-ascorbic acid to obtain the corresponding rGO. By using X-Ray Photoelectron Spectroscopy (XPS) and Raman spectroscopy, oxygen-related species and their concentration in GO and rGO products have been identified. The sizes of graphene sheets in those two carbon products are estimated by Dynamic Light Scattering (DLS) method. We find that the dispersion degree of the rGO product in a hydrophobic P3HT matrix depends on content of carboxyl (–COOH) and epoxy (C–O–C) groups on GO as well as on the graphene sheet size. At the same time, the most reduced and conductive rGO product (rGO-4) comes from a GO with the lowest oxygen content and lowest concentration of –COOH species, giving the largest graphene sheet sizes and spacing between the sheets. The homogeneous P3HT-rGO-4 composite material shows a micrometer sized laminated structure and a percolation threshold point around 20 wt%. The electrical conductivity of the composite is close to 10–1 S m−1, two orders of magnitude larger than the pristine P3HT. It is concluded that the electrical properties of rGO products can be improved by tailoring the type and concentration of oxygen species in GO.

Preparation and application of epoxidized natural rubber from Artocarpus heterophyllus gum

Epoxidized jackfruit gum (EJG) was prepared and characterized. An attempt to prepare a solid polymer electrolyte from EJG was made. The characterizations of epoxidized jackfruit gum were carried out through FT-IR spectroscopy, NMR spectroscopy, gel permeation chromatography, nitrogen content determination, water uptake determination and ion exchange capacity. The ion conductivity, differential scanning calorimetry, and SEM images of the blends of EJG and LiClO4 were characterized. The results indicated the epoxy group content of the sample achieved 95 mol% after 3 h of the epoxidation. During the epoxidation, the nitrogen content reduced, whereas the phospholipid content of the samples did not change. The molecular weight of samples reduced during the epoxidation. The ion conductivity of EJG/LiClO4/epoxidized natural rubber was improved, i.e. in order of 10−4 S/cm which was attributed to the presence of epoxy group in EJG. The liquid crystal may form in EJG/LiClO4 blends. These phenomena may suggest the strong interaction between epoxy group in EJG and LiClO4.

Cross-Metathesis between Polynorbornene and Poly(5,6-epoxy-1-octenamer)

The macromolecular reaction of interchain cross-metathesis between polynorbornene and poly(5,6-epoxy-1-octenamer) in the presence of the first-generation Grubbs catalyst is studied. Chemically stable poly(5,6-epoxy-1-octenamer) is obtained through metathesis polymerization of 5,6-epoxycyclooct-1-ene with the second-generation Grubbs ruthenium catalyst. New random multiblock copolymers of norbornene and 5,6-epoxycyclooct-1-ene with different average block lengths determined by the reaction time, solvent type, and concentrations of the catalyst and initial homopolymers are synthesized and characterized by NMR, GPC, and DSC. Despite a distance between the epoxy substituent and the reaction center (double bond), poly(5,6-epoxy-1-octenamer) shows a lower activity in the cross-metathesis reaction with polynorbornene compared to unsubstituted polyoctenamer. The influence of epoxy groups present in the backbones of homopolymer and norbornene–cyclooctene multiblock copolymers on their thermal characteristics is studied. It is shown that the glass transition and melting temperatures increase with the concentration of epoxy groups upon the incorporation of an oxirane fragment into both homopolymers and copolymers. The crystallinity of poly(5,6-epoxy-1-octenamer) increases with the content of trans-С=С bonds in the polymer.

Adducts of Epoxy Resins with Oligohexamethyleneguanidine and Their Based Modified Epoxy-Amine Films

Using commercial oligohexamethyleneguanidine hydrochloride, oligohexamethyleneguanidine hydrosalicylate having a higher solubility in epoxy resins is synthesized. On its basis, covalent adducts with epoxy resins are obtained in the medium of dimethyl sulfoxide. The kinetics of synthesis of these adducts and the stoichiometric ratio of oligohexamethyleneguanidine and an epoxy oligomer are studied by refractometry. Adducts are cured using oligomeric amine with allowance for the real content of epoxy groups. As a result, free elastic films having the glass transition temperature below room temperature are obtained. The activity of the modified films against gram-positive and gram-negative microorganisms is revealed. This indicates that the studied composites show promise for creating bactericidal coverings.

First-principles insight into Li and Na ion storage in graphene oxide**Project supported by the National Natural Science Foundation of China (Grant No. 11764019), the Education Department of Jiangxi Province, China (Grant No. GJJ170186), and Science Foundation for PHDs of Jiangxi Normal University, China (Grant No. 7957).

The structural, electronic, and adsorption properties of Li/Na ions on graphene decorated by epoxy groups are investigated by first-principles calculations based on density functional theory. Our results show that the concentration of epoxy groups remarkably affects the structural and electronic properties of graphene. The bandgaps change monotonically from 0.16 eV to 3.35 eV when the O coverage increases from 12.5% to 50% (O/C ratio). Furthermore, the highest lithiation potential of 2.714 V is obtained for the case of graphene oxide (GO) with 37.5 % O coverage, while the highest sodiation potential is 1.503 V for GO with 12.5% O coverage. This clearly demonstrates that the concentration of epoxy groups has different effects on Li and Na storage in GO. Our results provide a new insight into enhancing the Li and Na storage by tuning the concentration of epoxy groups on GO.

Synthesis of Resorcinol-Based Phosphazene-Containing Epoxy Oligomers.

Phosphazene-containing epoxy-resorcinol oligomers (PERO) are synthesized in one stage with the direct interaction of hexachlorocyclotriphosphazene (HCP), resorcinol, and epichlorohydrin in the presence of solid NaOH. Depending on the initial ratio of HCP:resorcinol, PERO contains from 20 to 50 wt.% phosphazene component (2.0–4.8% of phosphorus) and have an epoxy group content up to 30 %. Products are characterized using 1H and 31P NMR spectroscopy, MALDI-TOF mass spectrometry, and elemental analysis. According to mass spectrometry, the phosphazene fractions of PERO include up to 30 individual compounds with a predominance of cyclotriphosphazenes with one unsubstituted chlorine atom and four or five glycidyl groups. PERO has a lower viscosity in comparison with similar resins based on bisphenol A, which can simplify their use as a binder for polymer composites, adhesives, and paints.

THE BAND ENERGY ENGINEERING ON HIGH EPOXY (OR HYDROXYL) CONTENT GRAPHENE OXIDE

Nowadays, the superior properties of carbon-based materials especially nano structural derivation like graphene and graphene oxide (GO) spot light to the researchers. The GO has been suggested as an alternate material in device miniaturization due to its atomic structure. The memristors and nonvolatile memories are settled in these categories as a solution for the scaling limitation problem in the Moor’s law. Therefore, the GO can influence the memristor performance and characteristics. The current–voltage characteristics as the most significant parameter in the memristor design are considered. On the other hand [Formula: see text]–[Formula: see text] characteristic depends on the active layer (GO) bandgap energy in the metal/oxide/metal structure and therefore, needs to be explored. In the GO-based memristor, the bandgap energy can be changed by the percentage of the oxygen groups in comparison to the carbon on graphene sheets. Thus, the other parameters are overstated by the bandgap energy. In the presented work, the energy bandgap of a high epoxy group content of GO sheets is engineered. The opening of the bandgap in the graphene oxide by high epoxy groups content with the ratio of (O/C [Formula: see text] 50%) is studied. In other words, the oxygen adsorption effect on the Hamiltonian of the system is explored. For the proposed structure, the bandgap energy is modeled and the acceptable value (approximately equal to 2.799[Formula: see text]ev for epoxy groups) is obtained. Moreover, the hydroxyl group adsorption effect on the bandgap of the graphene oxide by high content hydroxyl group is considered (approximately equal to 2.647[Formula: see text]ev for epoxy groups). Consequently, the different absorption energy effects on the bandgap of the GO is participated and the opening bandgap in the range of 2[Formula: see text]ev to 3[Formula: see text]ev is obtained. The excitonic effect on the suggested model by epoxy groups and hydroxyl groups is explored and it is realized that the energy levels in the Dirac points of epoxy groups are closer than those of the hydroxyl groups.

Characterization of Epoxidized Natural Rubber for Coating Application

Epoxidized natural rubber was prepared by epoxidation of natural rubber with fresh peracetic acid in latex stage. The epoxidized natural rubbers with epoxy group content of 8, 15 and 27 mol% were prepared by adjusting the amount of fresh peracetic. The characterization of resulting materials was carried out through NMR spectroscopy, gel content determination and particle size measurement. The epoxidized natural rubber with various epoxy group contents were coated on the surface of the wood substrate by spin coating technique. The contact angle measurement and bending test were made for wood coated by epoxidized natural rubbers. The results show that the obtained epoxidized natural rubber is liquid resistance as is evident in high contact angle of water and poly(ethylene glycol) solution on the rubber surface. The bending strength of wood is improved by coating epoxidized natural rubber. The material with epoxy group content of 15 mol% is suitable for the protection of the wood surface.

Effect of interface on bulk polymer: control of glass transition temperature of rubber

In current paper, we demonstrated that molecular dynamics and glass transition of rubber can be controlled by constructing attractive interface between rubber matrix and fillers. Based on a combination of experiments and molecular simulations, it was revealed that interfacial segmental mobility was reduced and glass transition temperatures (Tgs) of epoxidized natural rubber (ENR) were significantly improved due to in situ polymerization of zinc dimethacrylate (ZDMA). During curing, ZDMA polymerizes in rubber matrix, resulting in the appearance of nanodispersion phases of poly-ZDMA (PZDMA). It was demonstrated that coordination interaction exists between epoxy groups and PZDMA in interfacial regions. Furthermore, using dynamic Monte Carlo simulations, it was observed that the interfacial regions that have highest content of epoxy groups exhibit lowest segmental mobility. Then, the increase of ZDMA content leads to the rise of the fraction of absorbed interfacial segments, and thus the Tgs of filled rubbers are improved.

Tailoring the morphology and epoxy group content of glycidyl methacrylate-based polyHIPE monoliths via radiation-induced polymerization at room temperature

Glycidylmethacrylate (GMA)-based poly(high internal phase emulsion) (polyHIPE) monoliths were prepared using a HIPE template via radiation-induced polymerization at room temperature. The effects of surfactant content, cross-linking degree, water fraction, and porogen content on the surface area, average void diameter, distribution of void diameter, average interconnection diameter, average pore diameter, and epoxy group content of GMA-based polyHIPE monoliths were investigated. The morphology and epoxy group content of GMA-based polyHIPE monoliths may be tailored by tuning each of the factors above according to the requirements of specific applications. Finally, the different morphology and epoxy group content of GMA-based polyHIPE monoliths were applied in phenol removal from cigarette smoke (CS) through a reaction between the epoxy group and phenol. The results showed that GMA-based polyHIPE monoliths with the higher content of epoxy group and bigger surface area showed the higher rate of phenol removal.

Research into epoxidation process of the С9 fraction hydrocarbons and unsaturated co-oligomers by peroxyethanoic acid

We have studied regularities of the epoxidation process of the С 9 fraction of liquid by-products of the pyrolysis of hydrocarbons and co-oligomers based on the С 9 fraction with peracetic acid. It is established that the use of the specified system makes it possible to achieve high values of conversion for double bonds and the selectivity of epoxidation process, sufficiently high yield of epoxy-containing co-oligomers. We established the possibility to use the С 9 fraction of liquid by-products of hydrocarbon pyrolysis (the accompanying product of ethylene production) as a raw material for obtaining epoxides, which is a rational method in order to dispose of the fraction. We analyzed experimental dependences of reagents consumption and the formation of epoxide in the reaction of the С 9 fraction epoxidation. It was established that the resulting values for selectivities of the epoxidation process by double bonds when obtaining epoxy-containing co-oligomers are the highest in the case of epoxidation of co-oligomers, synthesized by the heterogeneous catalytic co-oligomerization of the С 9 fraction S9 hydrocarbons using, as a catalyst, activated bentonite clay. The synthesized epoxy-containing co-oligomers retain residual unsaturation. It is obvious that the unsaturated bonds of styrene, vinyl toluene, α-methyl styrene, allylbenzene links at the ends of a co-oligomer macromolecules are easily epoxidized. The selectivity of epoxidation of co-oligomers, obtained by different methods of co-oligomerization of the С 9 fraction hydrocarbons (homogeneous catalytic, heterogeneous catalytic, initiated, and thermal) is different (60.2‒96.1 %) and depends on the nature of the starting co-oligomer. Using the methods of 1 H NMR-, Raman-, and infrared spectroscopy, we confirmed the high content of epoxy groups in the composition of epoxy-containing co-oligomers and the progress of the epoxidation reaction. Applying the method of 1 H NMR spectroscopy, we established the presence of epoxy groups formed based on the resulting vinyl double bonds of co-oligomers. Due to the content of oxirane oxygen and a high reaction ability of the oxirane ring, epoxy-containing co-oligomers can act as the raw material for subsequent obtaining of various chemical substances: glycols, carbonyl compounds, plasticizers, polymers.

Pseudomonas sp. Lipase Immobilized on Magnetic Porous Polymer Microspheres as an Effective and Recyclable Biocatalyst for Resolution of Allylic Alcohols

Magnetic porous polymeric microspheres containing epoxy groups were prepared by suspension polymerization (denoted as magnetic Fe3O4@GEM microspheres). Fe3O4@GEM with a specific surface area of 30.41 m2/g, average pore diameter of 17.13 nm, and pore volume of 0.13 cm3/g exhibited superparamagnetic behavior with the saturation magnetization of 7.1 emu/g. The content of epoxy groups on Fe3O4@GEM was 0.22 mmol/g. Pseudomonas sp. lipase (PSL) was covalently immobilized onto the Fe3O4@GEM microspheres through the reaction between the amino groups of the enzyme and the epoxy groups on the microspheres. PSL/Fe3O4@GEM exhibited enhanced enantioselectivity for the resolution of allylic alcohol to the corresponding optically active (S)‐allylic alcohol and (R)‐allylic alcohol acetate compared to free PSL. The enantiomeric excess of (S)‐l‐pheny‐2‐propen‐1‐ol for the former (98.1%) was 81.7 times that of the latter (1.2%) when the immobilized PSL was used for transesterification resolution of (R,S)‐l‐pheny‐2‐propen‐1‐ol. Furthermore, the ees and eep values were still retained at 95.2% and 95.4% after PSL/Fe3O4@GEM was recycled 10 times, indicating that PSL/Fe3O4@GEM had very good reusability. In addition, the transesterification resolution of (R,S)‐1‐(4‐methylphenyl)‐2‐propen‐1‐ol and (R,S)‐1‐(4‐bromophenyl)‐2‐propen‐1‐ol was catalyzed by PSL/Fe3O4@GEM, affording ideal ees and eep values of 99.3%, 97.4% and 99.6%, 98.2%, respectively. Therefore, PSL/Fe3O4@GEM demonstrated its potential as a highly efficient enzymatic reactor and Fe3O4@GEM would be very promising carriers for immobilizing enzymes in industrial application.