Hexanediol Diacrylate Research Articles

Fusion of immiscible covalent adaptable networks rooted in Enamine-One and β-Amino ester bonds with robust mechanically and excellent re-processing properties

Covalent adaptable networks (CANs) are widely used because of their outstanding mechanical properties and reprocessibility. However, these materials can only be recycled with mono-dynamic bonding networks during recovery. Here, we report that fused polymer CANs containing bi-dynamic bonds with adjustable mechanical properties are achieved through the dynamic behavior of the β-amino ester bond and the enamine-one bond. The β-amino ester bond-based CANs (P1) and the enamine-one bond-based CANs (P5) were prepared using tris(2-aminoethyl)amine (TREN) and m-xylylenediamine (MXDA) with hexanediol diacrylate and hexane-1, 6-diyl dipropiolate via click reaction, respectively. The mechanical and thermal properties of the fused films obtained after grinding and mixing at room temperature were comparable to those of CANs containing bi-dynamic bonds obtained by pre-mixing TREN and MXDA. Dynamic exchange and topological bond formation by the β-amino ester and the enamine-one at the interface are shown at the molecular level and with high uniformity. CANs containing bi-dynamic bonds showed synergism in stress relaxation experiments, demonstrating variable activation energies over a range of the temperature window. Owing to their excellent puncture resistance, the prepared materials can be used in flexible devices, energy-storage equipment, and various other applications.

Characterization of Fluoroacrylate Palm Oil Polyurethane (FPOPU) with Different Synthesis Methods Using Fourier-Transform Infra-Red (FTIR)

In this study, fluoroacrylate palm oil polyurethane (FPOPU) was synthesized with different synthesis methods. FPOPU was synthesized stepwise starting with the synthesis of acrylated epoxidized palm oil (AEPO) by a reaction of acrylic acid (AA) and triethylamine (TEA) as the catalyst. Then, palm oil polyurethane (POPU) was formed by the reaction of AEPO with isophorone diisocyanate (IPDI) and hydroxyethyl acrylate (HEA) as an end cap agent. POPU was further added with 1,6 hexanediol diacrylate (HDDA), trimethyloltripropane triacrylate (TMPTA), and heptafluorodecyl methyl-metacrylate (HDFDMA) monomers to form FPOPU. FPOPU synthesis methods were studied by manipulating the sequence of chemicals added, temperature, and mixing time of POPU. The FPOPU mixture was finally cast onto a silicone mold with 1 mm thickness and cured under UV radiation at 120 seconds. Based on the analysis, pre-mixed IPDI with HEA at 60°C for 15 min followed by the addition of AEPO at 60°C and further mixed for 3 hours (Method 2) shows the complete formation of the urethane chain. It is proven by the existence of NH peak at 3500 cm-1 and the disappearance of NCO peak at the range of 2200-2500 cm-1 indicating the NCO functional group has completely reacted with OH group in AEPO. The addition of fluorination also can be proved by the existence of CF stretching at 1012 cm-1. This study provides information regarding comparison between the synthesis method of FPOPU.

Effect of isobornyl acrylate and hexanediol diacrylate on the properties of UV-curable resin developed from suberic acid-derived polyester polyol

Effect of isobornyl acrylate and hexanediol diacrylate on the properties of UV-curable resin developed from suberic acid-derived polyester polyol

Projection Micro Stereolithography of Skin Layered Microporous Polymer Membranes As a Separator for Li-Ion Batteries

Commercial liquid electrolyte lithium-ion batteries (LIBs) traditionally incorporate microporous polymer membranes, or separators, to isolate electrode contact and enable ionic transport. Although they do not actively participate in cell chemistry, well-designed separators can influence cell performance and safety, and thus, are essential components of a cell. Current separator manufacturing processes include "wet" or "dry" mechanical stretching , phase inversion, and evaporation-induced phase separation. However, these processes have limited morphological control of geometry and layered structures. Additive manufacturing techniques have been used to rapidly prototype materials that have both high customizability and fine microstructural control. We investigate hexanediol diacrylate (HDDA) as a polymer system using projection micro-stereolithography, a layer-by-layer photopolymerization technique, to develop separators with controlled microstructures for Li-ion batteries. We successfully fabricate a unique polymer architecture of alternating nanometer thin skin layers and microporous network. The fine control of printing parameters (i.e., printing platform, skin layers, and exposure time), results in tunable porosity and morphology. This unique approach to manufacturing LIB separators provides hierarchical homogeneity for more uniform Li-ion transport. It’s potential as a LIB separator is explored by characterizing its electrolyte wettability, thermal tolerance, electrochemical properties, and mechanical stability. Finally, lithium symmetric cells using the HDDA microporous membranes are evaluated against Celgard 2325 separators. This work provides a promising new route for developing separators using additive manufacturing techniques to enable high performance Li-ion batteries.

Study of the Thermal and Mechanical Properties of the Hydrophilic Blend Material Polyhydroxyethyl Methacrylate/Polyethylene Glycol: Hydrogen Bonding Analysis

A hydrophilic blend material is a material that can take up an important quantity of water, which makes it useful in various applications such as tissue engineering, contact lenses, and drug delivery. In this study, the polymeric blend material polyhydroxyethyl methacrylate/polyethylene glycol (pHEMA/PEG) was prepared through a UV photo-polymerization reaction; hexanediol diacrylate (HDDA) and Darocur 1,173 were used, respectively, as a cross-linking agent and a photoinitiator. The main objective of this investigation was to evaluate the impact of the PEG content on the thermal and mechanical properties of the crosslinked pHEMA/HDDA. Many analytical techniques, including Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA), were used, to analyze the bonding vibrations, the glass transition temperature (Tg), and the elastic and loss moduli, respectively. The complex viscosity was analyzed by a rheometer. The swelling and deswelling behavior of the crosslinked pHEMA/PEG in distilled water were studied over time. It was found that the PEG increased the polymerization rate of the HEMA monomer, and a significant decrease in the glass transition temperature was observed with increasing PEG quantity in the blend material, confirming its plasticizing effect. The mechanical, swelling kinetics, and rheology results showed a threshold effect at 1 wt.% for PEG. The docking analysis showed that there was more hydrogen bonding between the pure pHEMA’s chains, but the integration of PEG decreased the number of hydrogen bonds, which gave flexibility to the blend material, hence; this theoretical conclusion well agreed with the experimental results.

Thermally Crosslinked F-rich Polymer to Inhibit Lead Leakage for Sustainable Perovskite Solar Cells and Modules.

High-performance perovskite solar cells have demonstrated commercial viability, but still face the risk of contamination from lead leakage and long-term stability problems caused by defects. Here, an organic small molecule (octafluoro-1,6-hexanediol diacrylate) is introduced into the perovskite film to form a polymer through in situ thermal crosslinking, of which the carbonyl group anchors the uncoordinated Pb2+ of perovskite and reduces the leakage of lead, along with the -CF2 - hydrophobic group protecting the Pb2+ from water invasion. Additionally, the polymer passivates varieties of Pb-related and I-related defects through coordination and hydrogen bonding interactions, regulating the crystallization of perovskite film with reduced trap density, releasing lattice strain, and promoting carrier transport and extraction. The optimal efficiencies of polymer-incorporated devices are 24.76 % (0.09 cm2 ) and 20.66 % (14 cm2 ). More importantly, the storage stability, thermal stability, and operational stability have been significantly improved.

CD13 Remote review for final patch test reading: a virtual reality?

Abstract Patch test reading at day 7 is suggested in current national (British Association of Dermatologists 2017) and international (European Society of Contact Dermatitis 2015) guidelines to identify late positive reactions. Allergens most established with late reactions are metals, antibiotics, acrylates and preservatives (Viggiano T, Yiannias JA, Yang YW. A retrospective review of late delayed positive patch testing greater than day 8 at Mayo Clinic from 2001 to 2020. Dermatitis 2022; 33:411–16). We report a case of significantly delayed contact dermatitis to four acrylates and ethyl paraben in a 49-year-old immunocompetent woman. She was referred to the cutaneous allergy clinic for patch testing following a rash affecting the torso after application of a sunscreen during a sunny holiday. She reported historical skin irritation after the use of nail lacquer and at the site of a caesarean section wound that was closed with skin glue 14 years prior. Patch test reading at day 4 (96 h) was negative; positive reactions to ethyl paraben, 2-hydroxyethylmethacrylate and ethyl cyanoacrylate appeared at day 23 (552 h). Positive reactions to hexanediol diacrylate and triethylene glycol diacrylate appeared at day 31 (744 h). These were communicated to us by the patient via email, with photographs clearly showing the development of new positive reactions. Of note, there was no reaction to the sunscreen product, although ethyl paraben was identified in the ingredients list, as well as two acrylate-containing polymers. Sensitization from diagnostic patch testing carried out to accepted international guidelines is rare but can occur with some allergens such as strong sensitizers, including paraphenylenediamine. The allergens identified in our case are found commonly in everyday cosmetics, adhesives and preservatives, including some that the patient had identified previous exposure to. Acrylates are acknowledged for causing potential delayed positive reaction by day 8 (Viggiano et al.); one case report describes true allergic acrylate reaction in a dental worker after 5 weeks (Fowler JF Jr. Late patch test reaction to acrylates in a dental worker. Am J Contact Dermat 1999; 10:224–5). There are no established reports of late positive reactions to ethyl paraben. With increasing online resources, delayed reactions beyond day 7 can be established with patient-initiated remote review of photographs taken during and subsequent to patch testing appointments. This case highlights the importance of keeping channels open for patients to contact the cutaneous allergy team after the final in-person reading to ensure (very) late allergen reactions are not missed.

Digital Light Processing of Zirconia Suspensions Containing Photocurable Monomer/Camphor Vehicle for Dental Applications.

This study reports the utility of solid camphor as a novel diluent in photocurable hexanediol diacrylate (HDDA) monomer to manufacture 4 mol% yttria partially stabilized zirconia (4Y-PSZ) components for dental applications by digital light processing (DLP). The use of a 65 wt% HDDA-35 wt% camphor solution allowed 4Y-PSZ suspensions to have reasonably low viscosities (1399 ± 55.8 mPa·s at a shear rate of 75 s-1), measured by a cone/plate viscometer, at a high solid loading of 48 vol%, where 4Y-PSZ particles prepared by calcination of as-received 4Y-PSZ granules, followed by a ball-milling process, were used with assistance of a dispersant. These 4Y-PSZ suspensions could be successfully applied to our custom-made DLP machine for manufacturing 4Y-PSZ components. To this end, several processing parameters, including layer thickness of 4Y-PSZ suspension, UV illumination time for layer-by-layer photocuring process, and initial dimensions of 4Y-PSZ objects, were tightly controlled. As sintering temperature increased from 1300 °C to 1500 °C, relative density and grain size of 4Y-PSZ objects increased, and cubic phase content also increased. Thus, after sintering at the highest temperature of 1500 °C for 3 h, high mechanical properties (biaxial flexural strength = 911 ± 40.7 MPa, hardness = 1371 ± 14.4 Hv) and reasonably high optical transmittance (translucency parameter = 7.77 ± 0.32, contrast ratio = 0.809 ± 0.007), evaluated by a spectrophotometer, were obtained due to a high relative density (97.2 ± 1.38%), which would be useful for dental applications.

Photocurable 3D-Printable Systems with Controlled Porosity towards CO2 Air Filtering Applications

Porous organic polymers are versatile platforms, easily adaptable to a wide range of applications, from air filtering to energy devices. Their fabrication via vat photopolymerization enables them to control the geometry on a multiscale level, obtaining hierarchical porosity with enhanced surface-to-volume ratio. In this work, a photocurable ink based on 1,6 Hexanediol diacrylate and containing a high internal phase emulsion (HIPE) is presented, employing PLURONIC F-127 as a surfactant to generate stable micelles. Different parameters were studied to assess the effects on the morphology of the pores, the printability and the mechanical properties. The tests performed demonstrates that only water-in-oil emulsions were suitable for 3D printing. Afterwards, 3D complex porous objects were printed with a Digital Light Processing (DLP) system. Structures with large, interconnected, homogeneous porosity were fabricated with high printing precision (300 µm) and shape fidelity, due to the addition of a Radical Scavenger and a UV Absorber that improved the 3D printing process. The formulations were then used to build scaffolds with complex architecture to test its application as a filter for CO2 absorption and trapping from environmental air. This was obtained by surface decoration with NaOH nanoparticles. Depending on the surface coverage, tested specimens demonstrated long-lasting absorption efficiency.

An Interpenetrating Polymer Network Hydrogel Based on Cellulose, Applied to Remove Colorant Traces from the Water Medium: Electrostatic Interactions Analysis

The main objective of this work was the removal of eosin Y and green malachite from an aqueous medium by using a cellulose-based biodegradable interpenetrated network (IPN). The IPN was obtained by the sequenced synthesis method. In the first step, cellulose was crosslinked with epichlorohydrin (ECH). In the second step, the obtained gels were swollen in a reactive mixture solution, which was based on the monomers 2-hydroxyethyl methacrylate (HEMA) and 1,6- hexanediol diacrylate (HDDA). After this, swelling equilibrium was reached through the gels' exposition to UV radiation. An infrared spectroscopy (FTIR) was used to analyze the bond stretching, which confirmed the IPN's formation. The swelling kinetics in aqueous mediums with different pH values showed a high swelling at a basic pH value and a low response in neutral and acidic media. The IPNs showed an improvement in water uptake, compared to the networks based on PHEMA or cellulose. The IPN was used to remove dyes from the water. The results showed that a high percentage of green malachite was removed by the IPN in six minutes of contact time. The experimental results were confirmed by the docking/modeling method of the system (IPN/Dye). The different physical interactions between the IPN and the dyes' molecules were investigated. The interactions of the hydrogen bonds with malachite green were stronger than those with eosin Y, which was in good agreement with the experimental results.

Large Scale Vat-Photopolymerization of Investment Casting Master Patterns: The Total Solution.

The material properties and processing of investment casting patterns manufactured using conventional wax injection Molding and those manufactured by vat photopolymerization can be substantially different in terms of thermal expansion and mechanical properties, which can generate problems with dimensional accuracy and stability before and during ceramic shelling and shell failures during the burn-out of the 3D printed casting patterns. In this paper and for the first time, the monofunctional Acryloyl morpholine monomer was used for 3D printing of casting patterns, due to its thermoplastic-like behavior, e.g., softening by heat. However, the hydrophilic behavior of this polymer led to an incorporation of up to 60 wt% of Hexanediol diacrylate, to control the water absorption of the network, which to some extent, compromised the softening feature of Acryloyl morpholine. Addition of a powdered wax filler resulted in a delayed thermal decomposition of the polymer network, however, it helped to reduce the thermal expansion of the parts. The dimensional accuracy and stability of the wax-filled formulation indicated an excellent dimensional tolerance of less than ±130 µm. Finally, the 3D printed patterns successfully went through a burn out process with no damages to the ceramic shell.

Photocurable soybean oil based phosphorus containing coatings for cotton fabrics: The influence of reactive diluents

In this work, a novel photocurable soybean oil based phosphorus containing oligomer was synthesized with the ring opening reaction between the epoxidized soybean oil and a phosphorus containing reactive monomer (Sipomer PAM-200). Instead of conventional heat and solvent based textile coating techniques, photocuring, which is a time and energy saving and solventless/waterless, environmentally friendly technology, was proposed. The structural characterization of the synthesized oligomer (S-ESBO) was performed by Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (1H NMR) spectroscopies. Then the coating formulations were prepared by using the S-ESBO oligomer and various reactive diluents; methyl acrylate (MA, monofunctional), hexanediol diacrylate (HDDA, bifunctional), and 1-vinyl-2-pyrrolidone (NVP, aromatic functional). The effects of the reactive diluent type on the mechanical, thermal, and surface properties of the coated photocured cotton fabrics were all investigated. The overall results demonstrate that the presence of the phosphorus group in the formulation increased the char yield values above 600 °C by inhibiting the spread of heat and pyrolysis products through the fabric sample. The thermal transitions, cotton fabric drapeability, weight loss of the fabrics with abrasion, mechanical and wettability properties were all affected based on the properties (i.e. aromatic, aliphatic, flexible, rigid etc.) of the functional groups of reactive diluents.

New Molecular Imprinting Nano Polymer Synthesis And Characterization As A Biocompatible For Drug Delivery Applications

New polymeric nanoparticles were to be developed for biomedical purposes as the purpose of this study. It was thought that theproduction of materials with novel properties and functions could be accomplished by meticulous design and synthesis, as well as theresearch of structure-property connections. A novel method that we developed has excellent sensitivity, cheap cost, and high stability.The molecularly imprinted polymer (MIP) used in this method, which is based on a functional monomer named polylactic acid(PLA), Acrylic acid (AA) , Methylacrylate (MA) Chitosan (Cs), Bisphenol A dimethacrylate(BADMA) , N,Ndimethylacrylamide(DMA), Polyvinylpyrrolidone (PVP), Ethylene glycol(EG), Methyl Methacrylate(MMA). To search into thepotential use of these hydrogels in controlled drug delivery systems, were crosslinked by 1,6 hexanedioldiacrylate (HDODA) andphotoinitiated by 1-hydroxycyclohexyl phenyl ketone before being polymerized using free radical polymerization.We synthesized the water-insoluble, amphiphilic polymer MIPs and for the first time described its structure and characteristics. Thispolymer, which has a nanostructure with a size of about 40-88 nm, is the ideal biocompatible polymer for nanobioapplications.Atenolol was loaded onto a produced hydrogel, and the drug release of such hydrogels in vitro and in vivo was studied. According tothe results, raising the pH accelerated the rate of drug release. Fourier transform infrared and 1HNMR spectroscopy, thermalgravimetric measurement, and scanning electron microscopy were used to analyze the produced hydrogels. I have been studyingabout the TGA and DSC utilizing argon medium gas and a 10 oC/min heating rate. The effect of TGA shows% residue between 2-12% at 500oC and char yield between 26- 50% at 400oC. Nanocopolymer hydrogels' glass transition values (Tg) ranged from 120 to275 °C.The faculty of biological science and biotechnology at Shahid Beheshti University also conducted studies on the efficiency of thesenanocopolymers using laboratory rats., Tehran, Iran on 18 Male Wistar rats weighing 200–240 g and divided rats into several groups,a group of natural control, and other groups for the induction of high pressure by Nacl (1%) and Dexamethasone, which includes ahigh pressure control group, , groups of treatment with polymers loaded with (Atenolol), and high pressure control groups, where Theresults showed that polymers have an obvious effect on lowering blood pressure levels in rats. Additionally, to avoid the issue ofincreased loading (Atenolol) caused by the treatment process (Atenolol), which is normally what happens as a result of an overdose,as well as to reduce the number of periodic blood pressure checks.

Switching Frontal Polymerization Mechanisms: FROMP and FRaP

Two frontal polymerization (FP) mechanisms, frontal ring-opening metathesis polymerization (FROMP) of dicyclopentadiene and frontal radical polymerization (FRaP) of benzyl acrylate and hexanediol diacrylate, were combined for rapid manufacturing of welded thermoset materials. Leveraging the immiscibility of the two different FP resins, welded thermosets and gradient foams of varying composition were achieved by switching of FP mechanisms. The adhesion strength of the welded thermoset materials differed depending on the originating mechanism. Finally, welded thermoset foams of varying porosity and homogeneity were generated through initiation from the bottom of the two resins.

A facile method to synthesis of a highly acrylated epoxidized soybean oil with low viscosity: Combined experimental and computational approach

This investigation deals with the introduction of an efficient technique to acrylate almost all of the epoxide groups on epoxidized soybean oil (ESO) and synthesize a highly acrylated ESO (AESO) by using viscosity control agents (VCAs). The effect of chemical structure, content, and addition step of VCAs (i.e. glycidyl neodecanoate, glycidyl hexanoate, and glycidyl acetate) on the reaction rate and viscosity was examined. Spectroscopy and analytical analyses as well as viscosity monitoring were employed to assess the acrylation reaction comprehensively. The intermolecular interactions were visualized by molecular dynamics simulation and quantified via the calculation of cohesion energy density to justify the viscosity changes during the reactions. Results demonstrated that the rate of ring-opening reaction is impaired by viscosity severely. Subsequently, the know-how for preparing the AESO with an acrylation degree of 3.5 via optimum reaction conditions was presented. Accordingly, this attempt indicated that the AESO diluted by acrylated glycidyl neodecanoate can be considered a promising oligomer along with other prominent diluents such as trimethylolpropane triacrylate and hexanediol diacrylate to prepare industrial light/UV-curable coatings with perfect performance (gel fraction: 97%, MEK double rub resistance: 75, Tg: 47 °C, hardness: 123, cross-cut adhesion: 4B, gloss: 97.5%, and water contact angle: 89°).

Effect of crosslinker on the wettability and mechanical properties of hydrophobic coatings deposited via atmospheric pressure plasma

AbstractHydrophobic coatings based on dodecyl acrylate (DOCA) and perfluorodecyl acrylate (PFDA) have been generated via “postdischarge” atmospheric pressure plasma deposition. These coatings exhibit a water contact angle (WCA) of around 125° but are accompanied by poor mechanical strength. To improve this property, two different types of chemical crosslinkers, that is, hexanediol methacrylate (HDMA) and hexanediol diacrylate (HDA), are incorporated into the precursor mixture. After plasma polymerization, both coatings with crosslinkers admixture show different wettability behavior. The addition of HDMA reduces the WCA while increasing the mechanical strength, while the addition of HDA retains the initial WCA magnitude while also increasing the mechanical strength. These changes are related to variations of the surface free energy (SFE) and topography of the plasma coatings.

Synthesis of ultraviolet curable bisphenol‐based epoxy acrylates and comparative study on its physico‐chemical properties

AbstractPhotocuring resins have emerged as cutting‐edge technology in coatings, adhesives, composites, additive manufacturing, and so forth. In the present work, different bisphenol, namely A, F, and S, were used to synthesize low molecular weight epoxy resin, which was further reacted with acrylic acid monomer to form bisphenol‐based epoxy acrylate (BEA). The BEA resins were formulated using reactive diluents, trimethylolpropane triacrylate, and hexanediol diacrylate in the ratio of 0–40 wt% at the increment of 10 wt% alongside a fixed quantity photoinitiator. These resins were then cast into dumbbell‐shaped specimens by irradiating them under ultraviolet (UV) light. The structural elucidation of BEA resins was performed using Fourier transform infrared, nuclear magnetic resonance, and UV–Vis spectroscopy. The formulated resins were also studied for their rheological properties. Further, the UV cured specimens were evaluated for mechanical, thermal, contact angle, and extent of curing. These outcomes were utilized for establishing the structure–property relationship based on the functionality, reactivity, and molecular structure of synthesized BEA resins, which controllers the design architecture and cross‐linking density of UV‐cured specimens.

3D Printable and Sub‐Micrometer Porous Polymeric Monoliths with Shape Reconfiguration Ability by Miniemulsion Templating

AbstractPorous monoliths prepared by high internal phase emulsion (HIPE) templating have received various attentions in the fields of catalysis, separation, and tissue engineering. However, the application of the monoliths from HIPE is limited by their poor mechanical performance and the difficulty of fabricating hierarchically porous structures. Additive manufacturing is an emerging technique that achieves high design freedom by depositing materials layer‐by‐layer. This work designs medium internal phase emulsion (MIPE) ink with the concept of miniemulsion to prepare 3D printable porous polymeric monoliths with sub‐micrometer pores. High shear energy is used to reduce the droplet size of the internal phase and jam the emulsion ink. The jammed MIPE ink shows prominent shear‐thinning behavior and appropriate elastic modulus for direct ink writing (DIW). After printing, the external phase composed of stearyl acrylate and hexanediol diacrylate can be cured by photopolymerization to produce poly(MIPE) with interconnected pores in the size of several hundred nanometers. The printed poly(MIPE) demonstrates high mechanical strength and can be reprogrammed into complex geometries difficult for the common DIW processes. The proposed technique provides a new route to fabricate hierarchically porous monoliths with a drastic change of pore dimension, high mechanical strength, and tunable shape reconfiguration.

Graphene oxide/epoxy acrylate nanocomposite production via SLA and importance of graphene oxide surface modification for mechanical properties

PurposeTraditional nanocomposite production methods such as in situ polymerization, melt blending and solvent technique, have some deficits. Some of these are non-homogeneous particle distribution, setup difficulties, time-consuming and costly. On the other hand, three-dimensional printing technology is a quite popular method. Especially, Stereolithography (SLA) printing offers some benefits such as fast printing, easy setup and smooth surface specialties. Furthermore, surface modification of Graphene Oxide (GO) and its effects on polymer nanocomposites are quite important. The purpose of this study is to examine the effect of surface modification of GO nanoparticles on the mechanical properties and morphology of epoxy acrylate (BisGMA/1,6 hexane diol diacrylate) matrix nanocomposites.Design/methodology/approachIn this study, Ultraviolet (UV) curable end groups of synthesized resin were linked to functional groups of graphene oxide, which are synthesized by the Tour method, which is a kind of modified Hummer method. In addition, synthesized GO nanoparticle’s surfaces were modified by 3-(methacryloyloxy) propyl trimethoxysilane. Significant weight percentages of GO were added into the epoxy acrylate resin. Different Wt.% of modified graphene oxide/acrylate resins was used to print test specimens with SLA type three-dimensional printer.FindingsSurface modification has a significant effect on tensile strength for graphene oxide nanoparticles contained composites. In addition, a specific trend was not observed for tensile test results of non-modified graphene oxide. The tendency of impact and hardness test finding were similar for both surfaces modified and non-modified nanoparticles. Finally, the distribution of particles was homogeneous.Originality/valueThis paper is unique because of the inclusion of both surface modifications of graphene oxide nanoparticles and SLA production of nanocomposites with its own production of three-dimensional printer and photocurable polymer resin.

Rapid synthesis of strawberry microcapsules via Pickering emulsion photopolymerization for use in multifunctional fabric coatings

Multifunctional microcapsules with osmanthus fragrance oil (OFO) as core materials and hexanediol diacrylate (HDDA)/modified titanium dioxide (TiO2) as shell materials were prepared via Pickering emulsion photopolymerization. The microcapsules are strawberry and core-shell structure and then blended with waterborne silicone resin to form multifunctional fabric coatings. The preparation process is rapid and environmentally friendly. The coated fabric can keep fragrance releasing for 85 days at room temperature condition, which showed slow releasing performance of fragrance. Meanwhile, due to perfluorooctyltriethoxysilane and ultraviolet absorbers Tinuvin 1130 grafting on the TiO2 nanoparticles in the shell of microcapsules, the coated fabric not only exhibits excellent superhydrophobicity with high water contact angle (WCA) (158.6°) and low sliding angle (SA) (9.0°), but also possesses Ultraviolet (UV) protection property with high Ultraviolet Protection Factor (UPF) value (210.5).