Moussa Barhoum

Controlled-release of ferulic acid from active packaging based on LDPE/EVA blend: Experimental and modeling . Saeed Gilak hakimabadi, morteza ehsani, Hossein Ali khonakdar, Mehdi Ghaffari, Seyed Hassan Jafari . Abstract In this study, low-density polyethylene (LDPE) and ethylene vinyl acetate copolymer (EVA), as non-polar and polar polymers, were blended with ferulic acid (FA) as natural antioxidant at various compositions to make active packaging films with a controlled release of FA characteristic. The phase behavior of the blends studied by scanning electron microscopy revealed matrix-droplet morphology in blend containing 10 and 30 wt.% EVA, while the morphology was seen to be co-continuous in the 50/50 composition. Based on the differential scanning calorimetry results a reduction in the crystallinity of LDPE with narrow crystallite size distribution was observed on increasing the EVA content of the blends. The release rate of FA from the LDPE/EVA films was measured by means of UV–vis spectrophotometry and the results were compared with the release behavior of the neat LDPE and EVA as reference materials. It was found that by applying the second Fick’s law the diffusion coefficient of EVA film against FA is 635 times greater than that of LDPE. The blends exhibited a better release behavior as compared to the neat polymers. The best and sustainable release behavior was obtained for the films with 30 wt. % of EVA content in which the FA was released in the environment with a controlled rate. Finally, the series, parallel, Maxwell and Equivalent Box Models (EBM) were applied to investigate the diffusivity coefficient of the blends. The EBM model showed the best agreement with the experimental data. . Keywords Active packaging, Controlled-release packaging, Low-density polyethylene, Release kinetics, Ferulic acid . Food, Packaging, and Shelf life (Volume 22, December 2019, 100392 ) . Best regards Mehdi Ghaffari PhD in Polymer | Professor at Golestan University | R&D Senior Manager | Researcher | Agricultural chemical compounds | Sustainability | Energy saving . #packaging #polymer #blend #shelflife #sustainable #ldpa #eva #mehdighaffari #mehdi_ghaffari #researcher

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The polymath-Unlocking the power of human versatility!! Too often, people are criticized for being a jack of all trades. However, being a polymath can be a valuable asset. It's important to explore your strengths and express yourself on social and professional media. Don't let criticism hold you back from embracing your diverse talents. Remember, multitasking is a skill, and expressing yourself is a soft skill that can set you apart. #Polymath #Multitasking #SoftSkills

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Learn about the average estimate of startup failures at different stages. It's important to prepare for the possibility of failure, but don't let it stop you from dreaming big. Remember, failure is a natural part of the journey to success. Check it out now! #startup #failure #success #dreambig https://lnkd.in/en2Csc36

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𝐌𝐚𝐬𝐭𝐞𝐫 𝐘𝐨𝐮𝐫 𝐌𝐞𝐞𝐭𝐢𝐧𝐠𝐬: 𝐉𝐞𝐟𝐟 𝐁𝐞𝐳𝐨𝐬' 𝐒𝐞𝐜𝐫𝐞𝐭𝐬 𝐭𝐨 𝐔𝐧𝐥𝐞𝐚𝐬𝐡𝐢𝐧𝐠 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐯𝐢𝐭𝐲 As per one study, 67% of meetings in Organization are considered unproductive. Interested in improving this statistic? Learn from one of the most effective CEOs, Jeff Bezos, and revolutionize your meetings using his strategies. Here’s a preview of essential rules for productive meetings: 𝐓𝐡𝐞 𝐓𝐰𝐨-𝐏𝐢𝐳𝐳𝐚 𝐑𝐮𝐥𝐞: Keep the meeting small enough that two pizzas could feed everyone. 𝐓𝐡𝐞 𝐄𝐦𝐩𝐭𝐲 𝐂𝐡𝐚𝐢𝐫 𝐑𝐮𝐥𝐞: Reserve one chair to symbolically include the customer in the meeting. 𝐍𝐨 𝐏𝐨𝐰𝐞𝐫𝐏𝐨𝐢𝐧𝐭𝐬: Instead of slides, Bezos prefers detailed 2-6 page memos. Applying these rules is just the beginning. Enhance your meetings further with these actionable tips: 𝐋𝐢𝐦𝐢𝐭 𝐀𝐭𝐭𝐞𝐧𝐝𝐚𝐧𝐜𝐞: Only essential personnel, about 6-8 people, should attend. No observers. 𝐏𝐫𝐞𝐩𝐚𝐫𝐞 𝐚 𝐃𝐞𝐭𝐚𝐢𝐥𝐞𝐝 𝐌𝐞𝐦𝐨: Write a well-structured, 6-page narrative to clearly present your case. 𝐒𝐭𝐚𝐫𝐭 𝐰𝐢𝐭𝐡 𝐚 "𝐒𝐭𝐮𝐝𝐲 𝐇𝐚𝐥𝐥": Begin by silently reading the memo together to ensure everyone is informed. 𝐄𝐧𝐠𝐚𝐠𝐞 𝐢𝐧 𝐎𝐩𝐞𝐧 𝐃𝐢𝐬𝐜𝐮𝐬𝐬𝐢𝐨𝐧: Encourage a lively debate and address tough questions. 𝐂𝐨𝐧𝐜𝐥𝐮𝐝𝐞 𝐰𝐢𝐭𝐡 𝐀𝐜𝐭𝐢𝐨𝐧 𝐈𝐭𝐞𝐦𝐬: Clearly assign tasks with responsible persons and deadlines. 𝐈𝐧 𝐬𝐮𝐦𝐦𝐚𝐫𝐲: Replace PowerPoint presentations with memos. Foster open and critical discussions. Invite only essential participants. End with definitive action steps. #ProductiveMeetings #LeadershipTips #BusinessSuccess #MeetingHacks #Teamwork #Efficiency #Innovation #ManagementSkills #SuccessMindset

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Made by compounding piezoelectric particles in silicone rubber, this ultra-stretchable kirigami material is designed to accurately sense in- and out-of-plane strains. A recent study reports ultra-stretchable kirigami piezo-metamaterials (KPM) for sensing coupled large deformations caused by in- and out-of-plane displacements using the lead zirconate titanate (PZT) and barium titanate (BaTiO3) composite films. The KPM are fabricated by uniformly compounding and polarizing piezoelectric particles (i.e., PZT and BaTiO3) in silicone rubber and structured by cutting the piezoelectric rubbery films into ligaments. The PZT KPM sensors are integrated into wireless sensing systems for the detection of vehicle tyre bulges, and the non-toxic BaTiO3 KPM are applied for human posture monitoring. The reported kirigami piezo-metamaterials open an exciting venue for the control and manipulation of mechanically functional metamaterials for active sensing under complex deformation scenarios in many applications. Credit: Video: Advanced Science News Paper: Hong, Luqin, et al. "Ultra‐Stretchable Kirigami Piezo‐Metamaterials for Sensing Coupled Large Deformations." Advanced Science 11.5 (2024): 2303674.

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Let's discover the multiple applications of one of the most important chemical products!

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Beyond the naked eye - Characterizing nanomaterials with precision This eBook presents some of the most advanced material characterization technologies on the market. Discover how to investigate the microscopic world using 3D X-ray imaging, and how to fully characterize powders. The guide also highlights the future of high-throughput imaging using focused ion beam-scanning electron microscopy (FIB-SEM) systems https://lnkd.in/eHsFytzq

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Just when you think there is enough surprises with Nickel, there is always another one hitting the deck. Interesting article from #merck and collaborators regarding application of #nickel chemistry for #cross-coupling reactions. #https://lnkd.in/dfxwe662

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*News alert* ➡️ We are proud to be part of “AmmoCatCoat” research project. Under the consortium leadership of Heraeus Precious Metals, six institutes and companies are researching the use of novel, directly heated #catalyst modules based on sustainable carbon. 🤝In collaboration with project partners Heraeus Precious Metals, Fraunhofer-Institut für Solare Energiesysteme ISE, Leibniz-Institut für Agrartechnik und Bioökonomie e.V. (ATB), Zentrum für Transmissionselektronenmikroskopie (CAU), Pyreg GmbH and Purem by Eberspächer, a highly qualified consortium has been formed that combines expertise in #catalysis, biomass conversion, material characterization, and surface treatment. This project is publicly funded by the German Federal Ministry of Education and Research (BMBF), with a total budget of approximately two million euros and a duration of three years. 💧 #Hydrogen as an energy carrier plays a key role in the energy transition. For transport, hydrogen can be chemically stored in the form of ammonia and then released again in the so-called “Ammonia Cracking” process. For this chemical reaction, precious metal catalysts based on ruthenium are exceptionally suitable. To make the process as sustainable, efficient, and cost-effective as possible, various requirements must be met. The materials used need to allow operation at low temperatures and have high long-term stability, as well as be used as sparingly as possible, and ideally are sourced from renewable resources. The project seeks to address these requirements through innovative approaches: 🔹 Utilization of a #ruthenium layer on a specially designed electrically heatable catalyst carrier system, ensuring optimal heat distribution. 🔹 Significant improvements in catalytic activity due to the synergy between novel bio-based carbon supports and ruthenium nanoparticles 🔹 The project aims for maximum #ammonia conversion at temperatures below 500°C. This results in substantial energy savings. 🔹 The focus is on compact design, durability and stability of the catalyst, which is achieved by employing a tailor-made carbon material derived from biomass as an innovative catalyst support. Curious to learn more about the topic. Just contact the #HeraeusCatalysts team.

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Why you should consider a replacement for PFAS polymers? According to ChatGPT, PFAS polymers, though effective in various applications, pose significant environmental and health risks. They persist in the environment indefinitely, accumulating in ecosystems and potentially harming wildlife and humans. Additionally, some studies have linked PFAS exposure to adverse health effects, including developmental issues and certain cancers. Therefore, exploring alternatives that are safer and more sustainable is crucial for mitigating these risks. Like to learn how and what are the options? https://lnkd.in/e2cBcD-q

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A fragmented data company can only lead to a fragmented AI strategy and implementation. This often results in redundant processes and increased costs. Consequently, the value generation may face challenges in surpassing the costs of implementation. #Data #AI #Implementation #CostEfficiency

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Steam intermolecular bonds Background Intermolecular bonds Broadly there are two types of weak intermolecular forces work between molecules (1) permanent polarity of positive and negative charges in a molecule generating positive and negative attractions for other molecules. This is also often called permanent dipole bonds. H bonds of water with positive carge on H and neative charge on O fall in this category. The other type of molecular association arises from transient polarization of non polar molecules which become polar temporarily due to change in electron density around the nucleus. The uneven electron density in non polar molecule generates transient negative and positive charge called temporary dipoles and associate with oppositely charged molecules. The association of molecules arising from temporary dipoles on non polar molecules are called van der Wall - London dispersion forces. These are very weak molecular associations. The association forces depend on the distance between two such molecules. At close distance van der Walls forces are repulsive and at long distance these forces cause attraction Intermolecular bonds in water Water exists as an association of water molecules due to its permanent dipoles by H bonds. One molecule of water can form four hydrogen bonds. Such huge network of association of molecules is the source of huge amount of energy that water can carry. The total energy of water is about 2679 kJ/kg. Of this 419 kJ/kg is water's sensible heat and 2240 kJ/kg is the latent heat that water carries as potential energy and passes on to steam when water converts to steam by breaking H bonds and by doing thermodynamic PV work as water expands to steam. Water breaks all its H bonds at saturation temperature when there is no more heat capacity of water to absorb any additional heat and water changes its phase to steam. However, an important point to note is while H bonds break at saturation temperature, the van der Walls forces still exist. With temperature and pressure increase as you go towards critical point of 373.95 degc, the repulsive forces become dominant over attractive forces thus reduce density of water until water and steam reach same density at critical point. The critical point is top most water - steam saturation equilibrium point in water's phase diagram. At critical point both water and steam exist at same density. It does not signify superheat of water. Both saturated steam and steam have no H bonds. The only difference in saturated steam is that H bonds break over the period as saturated water becomes steam releasing its potential energy or latent heat 2240 kJ/kg. At critical point, since it is a point there is no H bond and zero potential energy or zero enthalpy. As you go towards critical point by increasing temperature and pressure, the enthalpy of steam progressively reduces and becomes zero at critial point because of fewer H bonds. van der Walls repulsive forces work at critical point.

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1,2,4,5-Benzenetetracarboxylic anhydride 🔍 Exploring the Advantages of 1,2,4,5-Benzenetetracarboxylic Anhydride (BTCA) 🔍 1,2,4,5-Benzenetetracarboxylic anhydride (BTCA) is a versatile compound with numerous advantages across various industries. Here's a closer look at its key benefits: Adhesive Formulations: BTCA serves as a crucial component in adhesive formulations, offering excellent heat resistance and adhesion properties. Epoxy Resins: BTCA enhances the thermal stability and chemical resistance of epoxy resins, making them ideal for demanding applications in coatings and composites. Crosslinking Agent: BTCA acts as an effective crosslinking agent in polymer chemistry, improving the mechanical strength and durability of polymers. Textile Industry: BTCA is utilized in the textile industry for its ability to impart flame retardancy and crease resistance to fabrics. Water Treatment: BTCA finds application in water treatment processes, where it functions as a scale and corrosion inhibitor in cooling water systems. Unlock the potential of BTCA and explore its myriad advantages across industries! 🔬 #BTCA #ChemicalIndustry #Adhesives #EpoxyResins #PolymerChemistry #TextileIndustry #WaterTreatment #Innovation #Chemistry #LinkedInLearning

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#Positive #displacement #pipettes offer distinct advantages when it comes to measuring small volumes of viscous or volatile substances. Unlike commonly used #airdisplacement #pipettes, positive displacement #pipettes feature a piston directly in contact with the dispensed liquid. This direct contact allows for #precise #measurement, which is particularly beneficial for challenging substances. Each type has its #advantages and #disadvantages, making them suitable for different applications. Here’s a detailed comparison between the two: #Advantages Compared to Regular Pipettes: 1. Accuracy and Precision: Highly accurate and precise, especially with #volatile, #viscous, or #highdensity liquids. 2. Reduced Contamination Risk: Lower risk of #cross-contamination since the liquid does not come into contact with any internal parts of the pipette. 3. Consistency: Less affected by changes in ambient conditions such as temperature or humidity #Disadvantages: 1. Specialization: More specialized, typically used for specific applications that require high precision with challenging liquids. 2. Higher Cost: Generally more expensive than air displacement pipettes. 3. Complexity: This can be more complex and less intuitive to use compared to air displacement pipettes. Overall, while positive displacement pipettes offer unparalleled accuracy and precision for specific applications, their higher cost and complexity make them best suited for specialized laboratory settings where precise measurement of challenging liquids is paramount. Are you using the #Positivedisplacement #pipettes? Share your thoughts. Please #share the post if you find it #insightful. #Pipette #positivedisplacement #labsurvivalguide #DebsWednesDays

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Fact 62 I indicated where to look for information on industrial research on a catalyst for low-temperature N2O decomposition (Fact 58). But how to produce the catalyst itself? How to successfully scale production process? These are issues that are often patented! However, scientists from Łukasiewicz - New Chemical Institute (Poland), Jagiellonian University (Poland), and Lille University of Science and Technology (France) in cooperation shared the results of their experiments in the journal Catalysis Today. https://lnkd.in/eUzButV4

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❗ EC Scientific Committee Publishes Scientific Advice on Titanium Dioxide Grades Used in Oral Cosmetic Products ❗ Having considered all the information (including that evaluated by EFSA, 2021), the SCCS considers that the available evidence is not sufficient to exclude the genotoxicity potential of almost all of the types of TiO2 grades used in oral cosmetic products. The only exception are two nano grades (RM09 and RM11) for which the provided genotoxicity data indicate no genotoxicity concern. More information is, however, needed on the potential uptake and cellular effects of the nano grades in the oral mucosa to consider them safe for use in oral-care products. #beautyindustrynews #cosmeticscience #makeup #colorcosmetics #titaniumdioxide #cosmeticchemist #cosmeticsafety

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Today's KNOWLEDGE Share Some molding compounds contain a so-called "external lubricant". It is essentially a second immiscible polymeric material with a much lower viscosity. What happens when you mold such materials ? In extrusion things are quite obvious.The hydrodynamic forces push the dispersed lubricant to the surface of the die where they can act as expected and promote slip of the major phase polymer. In Injection Molding the combination of the Fountain flow, moving inner flow layers to the very edge, and the presence of a frozen skin, create a more complex situation. The high shear layer where lubricant will accumulate is INSIDE the frozen skin ! While this can still help to reduce the pressure to fill, this situation will also induce a serious risk of blistering/delamination. This delamination was well known for instance in the Xenoy grade made of PC/PBT. But other compounds, containing for instance a silicon based lubricant, will produce the same result, as reported by some of my customers. So, keep in mind that the lubricant (possibly necessary at the outer surface of the molded part if the intention is to control friction coefficient) doesn't quite go where you'd hope to see it. Note that this delamination can also occasionally be observed in pure HDPE if the molecular weight is high enough. In this case the low molecular tail (waxes) will accumulate at the frozen skin interface, promoting delamination. Source:Vito Leo https://lnkd.in/gKADNFWF

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