Article
Materials Science, Multidisciplinary
Le N. M. Dinh, Bich Ngoc Tran, Vipul Agarwal, Per B. Zetterlund
Summary: This study explores the effects of different preparation methods on polymer nanocomposite materials, and finds that the stability and physical properties of the nanocomposite films are greatly influenced by the preparation method and compositional details.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Maialen Argaiz, Miren Aguirre, Radmila Tomovska
Summary: Emulsifier-free cationic polymer colloids produced by emulsion polymerization have been successfully controlled and stabilized by using a minor quantity of cationic monomer containing two charges, resulting in stable dispersions with high solids content and films with tunable properties.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2022)
Article
Polymer Science
Yuzhi Xu, Ning Li, Guangbin Wang, Chunpeng Wang, Fuxiang Chu
Summary: A novel bio-based methyl methacrylate copolymerized with butyl acrylate (MMA-co-BA) hybrid resin was prepared using lignin as a macromolecular chain transfer agent, showing improved tensile strength and higher Young's modulus compared to pure resin. This research provides a new approach for utilizing waste biomass for high-value applications and serves as a reference for designing new materials for coatings or adhesives.
Article
Chemistry, Applied
Yiqian He, Jiawen Zhang, Ying Cai, Lingmin Yi
Summary: The study introduced a new method for preparing encapsulated pigments, which improved the dispersion stability and weather resistance of the pigments. This innovation has great potential for industrial applications.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Polymer Science
Linlin Jin, Junkai Tian, Xin Li, Jiawei Li, Dongming Qi
Summary: Water-based protective coatings are popular due to their low toxicity and volatile organic compounds (VOCs) emissions. However, improving water barrier performance is challenging. In this study, an environmentally friendly short-chain perfluoropolyether carboxylic acid (PFPE-MMA) material was synthesized and a series of PFPE-based polyacrylates were prepared using RAFT miniemulsion copolymerization. The addition of crystalline stearyl methacrylate (SMA) to PFPE-based polyacrylates promoted PFPE chains to migrate toward the air/film interface, resulting in exceptional wettability and water resistance, and remarkable water barrier properties.
Article
Chemistry, Physical
Jonas Blahnik, Sebastian Krickl, Klaus Schmid, Eva Mueller, John Lupton, Werner Kunz
Summary: This article presents a free-radical polymerization method in a mesostructured system without surfactants or other auxiliary agents. The aim is to study the impact of surfactant-free mesostructuring on polymerization kinetics and derived polymers.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Energy & Fuels
Xuezhen Wang, Kishore Mohanty
Summary: This study focuses on developing a strong foam using nanoparticles and surfactants to improve oil recovery in fractured, oil-wet reservoirs. The ECNP/SF foam showed better foamability and stability than SF foam and AOS foam in the presence of oil, with a significantly larger mobility reduction factor. Foam injection into fractured oil-wet cores resulted in significantly higher oil recovery compared to gas injection and conventional AOS foam injection.
Article
Chemistry, Applied
Adrian Perez, Emily Kynaston, Christopher Lindsay, Nicholas Ballard
Summary: This study investigates the influence of alkali soluble resins (ASRs) on the mechanical properties of latex films. It is found that the composition of the copolymer phase has little effect on the Young's modulus, while the high Tg ASR phase plays a key role. Increasing the Tg of the copolymer phase leads to higher elongation break and tougher materials. Polar additives in coatings formulations selectively plasticize the polar ASR phase, resulting in a significant decrease in mechanical performance.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Polymer Science
Boris Bizet, Etienne Grau, Henri Cramail, Jose M. Asua
Summary: The waterborne isocyanate-free grafted poly(hydroxy urethane)-poly(butyl methacrylate) hybrid dispersions were synthesized by miniemulsion polymerization, with the grafting induced by methacrylate functionalities in the poly(hydroxy urethane) and controlled by the degree of functionalization. It was found that grafting allowed for fine tuning of the mechanical properties of the PHU-containing hybrids.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Agriculture, Multidisciplinary
Jing Zhang, Lulu Dong, Qianwang Zheng, Jie Xiao, Yong Cao, Yaqi Lan
Summary: A surfactant-free oleogel-based emulsion stabilized by co-assembled ceramide/lecithin crystals was developed. The different molar ratios of gelator in the emulsions resulted in different crystal morphology and emulsion properties. The appropriate crystal structure and interfacial distribution provided better emulsion stabilization.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Engineering, Chemical
Lang Xu, Shenjie Zhong, Tian Zuo, Teng Wang, Ying Cai, Lingmin Yi
Summary: This study investigates the preparation of active polymer chains in sulfur-free RAFT (SF-RAFT) emulsion polymerization and their application as efficient stabilizers in soap-free latex preparation. The results show that active polymer chains can significantly decrease the concentration of surfactants while maintaining colloidal stability, demonstrating good control over the polymerization process and exhibiting living characteristics.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Kaikai Tang, Jun Xiao, Mengqi Long, Jun Chen, Hong Gao, Hao Liu
Summary: By decorating a 3D porous Ni foam with nitrogen, sulfur-codoped carbon (NSC@Ni), the Li metal anode can achieve dendrite-free Li deposition and exhibit high Coulombic efficiency and cycling stability.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Chemistry, Applied
Ali Delibas
Summary: In this study, poly(styrene-co-butyl acrylate) latexes containing ZnO and TiO2 nanoparticles were synthesized using miniemulsion polymerization, and characterized using various techniques. It was found that ZnO nanoparticles improved the strength and yellowing resistance of the latex films.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2021)
Article
Chemistry, Physical
Shu-Ming Cui, Saud Hashmi, Wen-Qiang Li, Stephan Handschuh-Wang, Cheng-Tian Zhu, Shi-Chang Wang, Yan-Fei Huang, Guang-Ming Zhu, Florian J. Stadler
Summary: This paper investigates Pickering emulgels stabilized by graphene oxide (GO) with didodecyldimethylammonium bromide (DDAB) as an auxiliary surfactant and liquid paraffin as the oil phase, which are proved to be excellent 3D printable ink. The structure of these emulgels is elucidated by microscopy, broadband dielectric spectroscopy and rheology analysis. It is found that the increase of DDAB surfactant and GO-contents results in an increase of modulus and viscosity, a reduction of nonlinear regime limits, and a complex variation of normal forces.
Article
Materials Science, Paper & Wood
Hongzhen Wang, Jujie Sun, Yongxian Zhao, Zhongqin Zhang, Shijie Cheng
Summary: In this study, Janus particles were synthesized by surfactant-free seeded polymerization to stabilize ASA emulsion, which showed a strong tendency to adsorb at the ASA-water interface and enhanced the stability of ASA emulsion. Compared with cationic starch, Janus particles exhibited superior emulsification performance in ASA emulsion, leading to significantly improved sizing performance of cellulose paper.
Article
Materials Science, Multidisciplinary
Diulia Quites, Jose Ramon Leiza, Daniele Mantione, Anthony Somers, Maria Forsyth, Maria Paulis
Summary: This study optimized the incorporation of organic corrosion inhibitors into waterborne coatings and successfully incorporated p-coumaric acid into polymeric binders. The anticorrosion performance of the coatings was tested and compared using electrochemical analysis.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Polymer Science
Stefano Chimenti, Marco Cerra, Tito Zanetta, Jose Ramon Leiza, Maria Paulis
Summary: Two phosphate functionalized acrylic binders were formulated to produce direct-to-metal paints without corrosion inhibitors. The performance of both paints, formulated without corrosion inhibitors, exhibited superior water sensitivity, mechanical stability, adhesion, and resistance against corrosion in high humidity, accelerated weathering, and salt-spray tests. Additionally, the paint based on an amorphous copolymer binder showed significantly better performance in the salt spray test compared to the DTM paint formulated with corrosion inhibitors.
Article
Materials Science, Ceramics
Inaki Emaldi, Edurne Erkizia, Jose Ramon Leiza, Jorge S. Dolado
Summary: Polycarboxylic ethers or polycarboxylate (PCEs) are commonly used superplasticizers in construction, but their microstructure-property relationship is not fully understood. A theoretical model has been proposed to explain the effect of PCE's microstructure-conformation on its adsorption onto cement particles and cement hydration time. Experimental investigation shows that PCEs with different side chain lengths have different dispersing mechanisms. The theoretical model's prediction is mostly accurate, except for PCEs with the shortest side chains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Chemical
Fabian Wenzel, Urko Larranaga, Miren Aguirre, Jose R. Leiza
Summary: The thermally initiated thiol-ene emulsion polymerization of DAP diene and EDDT dithiol monomers was studied in batch and semibatch processes. The stability of the latexes was limited in both processes, leading to aggregation phenomena. Changing the diene monomer to DATP resulted in smaller particles and narrower distribution without aggregation. Partial substitution of the dithiol by a more water-insoluble trithiol affected nucleation, yielding smaller particles. The synthesized polythioether polymers showed low glass transition temperatures and crystalline films.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Edurne Gonzalez, Aitor Barquero, Maria Paulis, Jose Ramon Leiza
Summary: The present work demonstrates the use of green electrospinning to create composite nanofibers containing inorganic nanoparticles. By encapsulating the nanoparticles in polymer particles through miniemulsion polymerization and spinning them with polyvinyl alcohol as a template, it is possible to achieve excellent distribution and encapsulation of the nanoparticles without altering the nanofibers' size. This technology allows for the incorporation of multiple types of nanoparticles, making it a promising technique for sensing and biomedical applications.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Sara Beldarrain, Aitor Barquero, Guido Goracci, Jorge S. Dolado, Jose Ramon Leiza
Summary: In this study, Methacrylic acid-co-poly(ethylene glycol methacrylate) (MAA-co-PEGMA) copolymers with uniform composition but different charge-density or side chain lengths were synthesized by free-radical copolymerization. The effect of these copolymers on the hydration kinetics of Ordinary Portland Cement (OPC) was analyzed. It was found that increasing the PCE concentration led to a delay in hydration. Moreover, the delay was longer with higher MAA/PEGMA ratios or shorter side chain lengths of PEGMA. The hydration delay was proportional to the carboxylate dosage and all PCEs fit in a master curve, indicating a correlation between the microstructure of the PCEs and the hydration delay of commercial OPC.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Engineering, Chemical
Aitor Barquero, Oihane Llorente, Daniela Minudri, Maria Paulis, Jose Ramon Leiza
Summary: Solvent-free waterborne polyurethane-poly(meth)acrylate hybrid dispersions are synthesized for formulating anticorrosive paints. A phosphate containing polymerizable surfactant, Sipomer PAM 200, is incorporated to enhance the anticorrosive protection by forming an iron phosphate passivation layer. The effectiveness of this passivation layer is evaluated in different corrosive environments.
MACROMOLECULAR REACTION ENGINEERING
(2023)
Article
Polymer Science
Miren Aguirre, Nicholas Ballard, Edurne Gonzalez, Shaghayegh Hamzehlou, Haritz Sardon, Marcelo Calderon, Maria Paulis, Radmila Tomovska, Damien Dupin, Ren H. Bean, Timothy E. Long, Jose R. Leiza, Jose M. Asua
Summary: The water-based emulsion polymerization process has led to the continuous growth in commercial use of polymer colloids due to its high efficiency and versatility in production. This perspective highlights the challenges in synthesis and application of polymer colloids, including the transition towards sustainable feedstocks and reduced environmental impact in their primary applications, as well as the design and application of novel polymer colloids in emerging areas. Unconventional processing techniques utilizing the unique colloidal nature are also presented.
Article
Chemistry, Physical
Usue Olatz Aspiazu, Shaghayegh Hamzehlou, Nicola Palombo Blascetta, Maria Paulis, Jose Ramon Leiza
Summary: Particle size and particle size distribution are important properties of polymer latexes that affect film formation and rheological properties. Turbidity spectroscopy is used to measure the particle size of nanoparticles in dispersed media, and wavelength exponent based calibration curves can successfully monitor the particle size during the polymerization process.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Christopher T. Desire, R. Dario Arrua, Fotouh R. Mansour, Stefan A. F. Bon, Emily F. Hilder
Summary: Poly(styrene-co-divinylbenzene)-based monoliths were prepared using water-in-monomer high internal phase emulsions. The inclusion of water-soluble monomers improved the homogeneity of the monoliths and enhanced their chromatographic performance. The monoliths grafted with PEGDA showed superior separation capabilities for more complex mixtures, while the monoliths grafted with AAm exhibited increased hydrophilicity for retaining polar analytes.
