Progress in Organic Coatings最新文献

{"title":"Effects of 3,3,3-trifluoropropyl content in poly (dimethyl-methylphenyl-methyltrifluoropropyl) siloxane coating on its antifouling performance","authors":"","doi":"10.1016/j.porgcoat.2024.108777","DOIUrl":"10.1016/j.porgcoat.2024.108777","url":null,"abstract":"<div><p>Fluorosilicone polymers with a high fluorinated group content are shielded from their interactions with crosslinking agents and solvents by their closely arranged fluorinated groups on their surface. Herein, a series of poly(dimethyl-methylphenyl-methyltrifluoropropyl)siloxanes (PDPFSs) were synthesized using the hydrolysis–polycondensation method to reduce the shielding effect of the fluorinated groups. Dimethyl dimethoxy silane, phenyl methyl dimethoxy silane, and 3,3,3-trifluoropropyl methyl dimethoxy silane (TFMDS) were the main raw materials. The chemical structure of PDPFS and the thermal stability, surface properties, mechanical properties, and antifouling properties of the PDPFS coating were characterized. When the TFMDS content increased from 0 to 40 wt%, the number average molecular weight of PDPFS decreased from 43,380 to 38,433 g/mol and the chemical crosslinking rate of the PDPFS coating decreased from 81.25 % to 68.09 %. An analysis of the surface properties of the PDPFS coating revealed a decrease in surface free energy from 24.22 to 13.19 mJ/m² and an increase in roughness from 0.013 to 0.048 μm. The mechanical properties were examined, indicating that the Young's modulus of the PDPFS coating increased from 0.10 to 0.46 MPa and the average molecular weight between crosslinking points increased from 24,795 to 3285 g/mol. Experimental results revealed that the anti-adhesion efficiency and removal efficiency of the PDPFS coatings was mainly related to the TFMDS content. The anti-adhesion efficiency and removal efficiency were proportional to roughness, Young's modulus, and crosslinking density and inversely proportional to number average molecular weight and surface free energy. Further analysis of the comprehensive antifouling ability of the PDPFS coatings revealed that the antifouling efficiency of the PDPFS coating gradually increased from 16.83 % to 62.12 % with increasing TFMDS content. However, the 3,3,3-trifluoropropyl group exhibited an adverse effect on the hydrolysis–polycondensation and crosslinking reactions when the TFMDS content exceeded 35 wt%. Hence, PDPFS with a TFMDS content of 35 wt% was selected for further research.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of acrylic water-based inks for plastic films: Tuning binder's properties by low temperature self-crosslinking of allyl acetoacetate-hexamethylenediamine","authors":"","doi":"10.1016/j.porgcoat.2024.108776","DOIUrl":"10.1016/j.porgcoat.2024.108776","url":null,"abstract":"<div><p>The emerging of flexible package market compels us to develop printing inks that are eco-savvy and suitable for polymer films. Owing to the advantages of low toxicity, environmental-friendly and cost-effective, water-based inks growingly occur to researchers and the studies on binders for water-based inks unprecedentedly flourish. Notwithstanding, the adhesion on polymer films and the slower dryness rate constrain the water-based inks to be the mainstream in the field of flexible package printing. In this work, a crosslinkable polyacrylate emulsion for water-based inks binders was successfully synthesized via semi-continuous seed emulsion polymerization to improve the adhesion and dryness rate of ink films. Particularly, crosslinkable monomer allyl acetoacetate (AAA) was utilized as crosslinkable monomers, hexamethylenediamine (HDA) was added as a crosslinker. Isobornyl methacrylate (IBOMA) was employed to endow the emulsion with desirable adhesion for water-based inks. The viscosity, surface tension, water contact angle, particle size distribution and glass-transition temperature (Tg) were evaluated to research the influence of the AAA and HDA crosslinkable system. Performances of the acrylate emulsion and the latex films, with emphasis on resistance to Ca²⁺ and thermal stability were obviously superior to other polyacrylate emulsions synthesized in this paper. The 100 % adhesion ratio on polyvinyl chloride (PVC) and polyethylene (PE) films and 80.08 % adhesion ratio on biaxially oriented polypropylene (BOPP) was attained with AAA-HDA crosslinkable polyacrylate emulsion. The dryness rate was accelerated from 23 mm/30 s to 40 mm/30 s. This work provides ideas and inspiration for design of the water-based inks that served in flexible package.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polydopamine functionalized graphitic carbon nitride nanosheets as acid stimuli-responsive nanocarrier of 2-mercaptobenzimidazole for intelligent anticorrosion coatings","authors":"","doi":"10.1016/j.porgcoat.2024.108782","DOIUrl":"10.1016/j.porgcoat.2024.108782","url":null,"abstract":"<div><p>Waterborne epoxy (EP) is considered a promising environmentally friendly anticorrosive technology with extensive potential applications. However, its limited anticorrosive ability poses significant challenges in practical usage. In this study, we use dopamine (DA) polymerization to load 2-mercaptobenzimidazole (MBI) onto the surface of g-C₃N₄ (CN) nanosheets, resulting in the synthesis of MBI-PDA@g-C₃N₄ (MBI-PDA@CN) nanosheet composites. The MBI-PDA@CN composite exhibits favorable hydrophilicity and high loading capacity of 35.8 %, enabling the formation of compact bonding layer at the interface with the EP. Simultaneously, the MBI-PDA@CN nanosheets exhibit a fully lamellar structure, thereby effectively impeding the infiltration of corrosive agents. Electrochemical tests show that the coating resistance (<em>R</em>_p) of MBI-PDA@CN/EP coating (8.5 × 10⁷ Ω cm²) exhibited a significantly higher magnitude compared to that of the EP (2.6 × 10⁶ Ω cm²) after being immersed in 3.5 wt% NaCl solution for 30 days. It is worth mentioning that the MBI-PDA@CN nanosheets possess the capability to gradually release MBI-PDA molecules in acidic environments. Given that MBI and PDA function as outstanding metal corrosion inhibitors, they substantially augment the corrosion resistance of the coating in acidic conditions. This study presents an intriguing approach to fabricating robust corrosion-resistant composite coatings.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing wettability and water resistance of coatings using tung oleic acid-based gemini wetting agent via fischer esterification","authors":"","doi":"10.1016/j.porgcoat.2024.108779","DOIUrl":"10.1016/j.porgcoat.2024.108779","url":null,"abstract":"<div><p>As societal awareness of environmental concerns grows, there is a gradual transition towards more environmentally friendly aqueous products, replacing traditional solvent-based ones. However, owing to its short hydrophobic chain segment, polyether defoamer has limitations, including a narrow field of use, poor defoaming ability, and a low defoaming rate. This study employed Fischer esterification to graft tung oil acid (i.e., eleostearic acid) onto 2,5,8,11-tetramethyl-5-decyne-4,7-diol, ethoxylated (TDDE) using p-toluenesulfonic acid as a catalyst. The resulting product, polyether alkynyl alcohol wetting agent (ETDDE), consisted of a tung oil monomer chain (hydrophobic part) and a polyether chain (hydrophilic part). The successful synthesis of ETDDE was confirmed through infrared spectroscopy analysis, gel permeation chromatography testing, and acid value determination. The results showed that the surface tension, defoaming ability, coating gloss, wettability, and water resistance of ETDDE improved with the ratio of eleostearic acid to TDDE.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization and stability of innovative modified nanosilica-resin composite coating: Subjected to mechanical, chemical, and cryogenic attack","authors":"","doi":"10.1016/j.porgcoat.2024.108780","DOIUrl":"10.1016/j.porgcoat.2024.108780","url":null,"abstract":"<div><p>It is crucial to enhance the concrete permeation resistance to liquefied natural gas (LNG) by utilizing a functional coating having excellent cryogenic stability. In this study, a novel method was provided to prepare a modified nanosilica-resin composite coating with excellent oleophobicity and permeation resistance to small molecule alkane oils. The properties of this coating were comprehensively characterized in terms of wettability test, mechanical stability test, chemical stability test, and oil impermeability test. Additionally, its cryogenic stability was also evaluated through the above methodologies. The results showed that the contact angle of mineral oil on the coating exceeds 150°, with a contact angle loss rate of only 2.98 % after 100 cycles of sandpaper abrasion. The contact angle remained above 130° after 24-h immersion in HCl, NaOH, and NaCl solutions, indicating its excellent chemical stability. Upon application, the coating significantly reduces the oil absorption rate of concrete exposed to small-molecule alkane oil by &gt;80 %. More significantly, the contact angle of the coating remained above 150° even after cryogenic treatment, exhibiting a minimal contact angle loss rate of just 2.77 % following 100 cycles of sandpaper abrasion, demonstrating excellent cryogenic stability. The scanning electron microscope and X-ray photoelectron spectrometer results showed that the coating can maintain micro-nano rough structure and chemical structure of fluorine-containing low surface energy functional groups after cryogenic treatment, attributing to its remarkable stability. These findings underscore the novel coating's substantial potential for application potential in various cryogenic industrial fields.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142135975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An eco-strategy for development of more sustainable coatings","authors":"","doi":"10.1016/j.porgcoat.2024.108781","DOIUrl":"10.1016/j.porgcoat.2024.108781","url":null,"abstract":"<div><p>Addressing the significant challenges stemming from human activity on the environment requires active participation from all sectors, including the coatings industry. While there has been considerable effort to encourage individual involvement and responsibility, there lacks an overarching eco-strategy for the industry as a whole. This work proposes a guideline to prioritize efforts for maximum positive environmental impact, focusing specifically on the direct product-related impacts of the coatings industry (Scope 3).</p><p>The eco-strategy is founded on two main components: a “red list” outlining hazardous ingredients to be avoided to comply with legislation and a Life Cycle assessment of all raw materials used in the coatings industry in a year.</p><p>It concludes that a “red list” will be different when the coatings are for industrial use under controlled conditions or if the coatings are for consumer use. Hazardous ingredients may be required to enable production of durable coatings to be used in industry, while the same hazardous substances are recommended to be reduced or even phased out in consumer products.</p><p>The findings from the Life Cycle Assessment (LCA) on the industry's use of raw materials reveals that epoxy resins, titanium dioxide, acrylic resins, and metallic zinc dust collectively account for over 50 % of environmental impacts across all assessed categories due to their high usage volumes combined with their impact potential. As such, substitution or further development of these raw material groups should be prioritized for future research and development in academic and within the industry.</p><p>Moreover, the eco-strategy underscores the importance of durability in achieving environmental sustainability. Any substitution of raw materials must ensure comparable or even improved durability of the coatings to maintain environmental benefits.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0300944024005733/pdfft?md5=4ade75fb640ed5edeea53d157a52711b&pid=1-s2.0-S0300944024005733-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waterborne polyurethane based on dual crosslinked structure with excellent mechanical properties, water and corrosion resistance","authors":"","doi":"10.1016/j.porgcoat.2024.108784","DOIUrl":"10.1016/j.porgcoat.2024.108784","url":null,"abstract":"<div><p>Due to the increased presence of hydrophilic groups in waterborne polyurethane (WPU) coatings, consequently leading to compromised corrosion resistance and reduced service life. To solve the problem, a series of waterborne polyurethanes were synthesized via internal emulsification using dicyclohexylmethane diisocyanate (HMDI) and polytetrahydrofuran ether diol (PTMG) as the primary raw materials. The triethanolamine (TEOA) was used as a crosslinking agent and corrosion inhibitor, while N- (β-aminoethyl) -γ-aminopropyl trimethyl-(ethyl) oxy-silane (KH-792) was introduced as a coupling agent to establish a system with a dual crosslinking structure. The crosslinking degree of the double network structure can be adjusted by changing the amount of KH-792. Then the influence of KH-792 content on the performance of SWPU dispersions and film were studied. The research shows that the waterborne polyurethane with a KH-792 content of 3 wt% exhibits exceptional mechanical strength, reaching 34.64 MPa, with only 3.32 % water absorption and an adhesion strength of 2.64 MPa. Furthermore, it exhibited a high impedance modulus (2976.4 Ω/cm²) at low frequencies. Therefore, this compound holds promising potential for application in anti-corrosion coatings field.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spray drying of polymer dispersions for redispersible powder coatings: Effects of stabilization mechanisms and process conditions","authors":"","doi":"10.1016/j.porgcoat.2024.108769","DOIUrl":"10.1016/j.porgcoat.2024.108769","url":null,"abstract":"<div><p>Redispersible powder coatings (RPCs), which do not rely on water in storage cans, provide a sustainable route to lightweight transportation and biocide-free storage of architectural coatings. However, difficulties with powder production and subsequent film formation and particle dispersion upon water addition, have prevented the method from becoming a reliable alternative to traditional waterborne coatings.</p><p>This study investigates optimization of a spray drying process for vinyl acetate-ethylene (VAE) polymer dispersions, as well as the mechanisms underlying film formation of redispersible polymer powders (RPPs) in water.</p><p>Spray drying of VAE dispersions was carried out in the presence of a protective colloid and, when necessary, the inclusion of anticaking agents. The addition of protective colloid and anticaking agents, as well as reduction of the inlet temperature, reduced the particle size and increased the spray drying yield. With a finer particle size of the anticaking agents, free-flowing powders were obtained. For evaluation of the effects on the spray drying process and the resultant powder characteristics, VAE dispersions with four different polymer glass transition temperatures (T_g) and two alternative particle stabilizations, polyvinyl alcohol (PVA) and an emulsifier-PVA mixture, were used. For PVA-stabilized VAE (P-VAE) dispersions, particle sizes down to 1.0 μm and process yields around 80 wt% were achieved, while the lowest particle size and highest yield achievable was 4.69 μm and 29.2 wt%, respectively, for emulsifier- and PVA-stabilized VAE (EP-VAE) dispersions. The morphology of the prepared powders was affected by the choice of stabilization type. When using P-VAE dispersions, particles agglomerated, forming a raspberry like structure, whereas EP-VAE particles resulted in larger, spherical particles.</p><p>When prepared powder polymers were used to formulate coatings, the wet scrub resistance (WSR) was influenced by the choice of VAE polymer with varying T_g and stabilization mechanism of the polymer dispersions. Coatings formulated with a low T_g EP-VAE exhibited enhanced film formation, leading to a higher WSR, while high T_g EP-VAE resulted in a lower WSR. Conversely, P-VAE powders did not provide coherent coating films and washed away completely after 200 cycles in the WSR test, however, provided favorable results with the addition of a solid plasticizer.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0300944024005617/pdfft?md5=fe28f7f03da3e2b9f17afb82216d6c4f&pid=1-s2.0-S0300944024005617-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Durable microstructure-based superhydrophobic composite with photothermal performance for multifunctional application","authors":"","doi":"10.1016/j.porgcoat.2024.108764","DOIUrl":"10.1016/j.porgcoat.2024.108764","url":null,"abstract":"<div><p>Nowadays, multifunctional superhydrophobic coating has drawn widespread attention by virtue of its great water-repellent property, whereas the fragile mechanical and chemical durability of superhydrophobic coating greatly limits its practical application. Herein, a robust and multifunctional superhydrophobic composite coating (CFRE-SP@Fe₃O₄) with anti-corrosion, delay-icing and self-deicing performance is constructed via simple imprinting-demolding process on the carbon fiber reinforced epoxy resin (CFRE) surface and post-deposition modification with polydimethylsiloxane (PDMS) and epoxy resin modified Fe₃O₄ nanoparticles. The obtained CFRE-SP@Fe₃O₄ coating displays a superhydrophobic property with a WCA of 155° ± 1.2°. By virtue of the protection effect of the robust micro-grid structures for the inner superhydrophobic Fe₃O₄ nanoparticles (SP@Fe₃O₄), the CFRE-SP@Fe₃O₄ coating still maintains great superhydrophobicity after linear friction for 100 times. Additionally, compared with the carbon steel treated with CFRE, the impedance modulus at lowest frequency of CFRE-SP@Fe₃O₄ coating treated group further increase with a value of 10⁷ Ω·cm², confirming the excellent anti-corrosion performance. Owing to the air pocket captured by the micro-/nanostructure on the superhydrophobic surface, the icing time of the CFRE-SP@Fe₃O₄ surfaces extends from 60 s to 2130 s. Moreover, combined with the photothermal conversion performance of carbon fiber and Fe₃O₄ nanoparticles, the ice on the CFRE and CFRE-SP@Fe₃O₄ coatings surfaces begin to melt 137 s, displaying the excellent self-deicing performance.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cellulose acetate hierarchical porous coated textile with passive daytime radiative cooling, flexibility and durability","authors":"","doi":"10.1016/j.porgcoat.2024.108772","DOIUrl":"10.1016/j.porgcoat.2024.108772","url":null,"abstract":"<div><p>Passive daytime radiative cooling technology is a highly efficient cooling technology with zero energy consumption. When utilized for personal thermal management, radiative cooling textiles are capable of finely regulating the temperature of the human skin microenvironment. This study presents a cellulose acetate (CA) hierarchical porous coated textile that accomplishes high reflectance of sunlight over the full wavelength range, with a low cost and scalability, and a simple preparation procedure. With a high reflectance of 0.91 in the solar wavelength band and a high emissivity of 0.95 in the atmospheric window wavelength band, the CA hierarchical porous coated textile offers exceptional spectrally selective performances. It manifests a subambient cooling temperature of up to 19.0 °C and a skin overheating prevention effect of up to 4.2 °C. Furthermore, the coated textile possesses promising abrasion resistance, acid-alkali corrosion resistance, and mechanical properties. The present work provides a facile path for the development of green-based radiative cooling coated textiles.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}