scholarly journals The Properties of an Aluminum/UV-Curable, Infrared, Low-Emissivity Coating Modified by Nano-Silica Slurry

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 382 ◽  
Author(s):  
Xiaoxing Yan ◽  
Yijuan Chang ◽  
Xingyu Qian
Keyword(s):  
Industrial Development ◽  
Impact Resistance ◽  
Uv Curing ◽  
Infrared Emissivity ◽  
Curing Time ◽  
Nano Silica ◽  
Uv Curable ◽  
Orthogonal Experiments ◽  
Key Factor ◽  
Silica Slurry

To improve the performances of UV-curable coatings, the effects of nano-silica slurry, aluminum and UV-curing time on the glossiness and infrared emissivity of UV-curable coatings were investigated by orthogonal experiments. The results showed that UV-curing time is a key factor affecting the performance of the coating. When the UV-curing time was increased from 30 to 360 s, the glossiness of the UV-curable coating slowly decreased from 11.1% to 9.0%. The L’ value decreased from 78.6 to 75.0. The infrared emissivity of the coating with UV-curing time of 180 s was 0.106, which was the lowest. The coating hardness with different curing time was 6H. The coating roughness was high when the UV-curing time was 30–120 s. When the UV-curing time was greater than 300 s, the coating adhesion was 0 and the coating had the best impact resistance of 500 N/cm. The overall performance of the aluminum/UV-curable coating was optimal when the UV-curing time was 180 s. This research is able to promote the industrial development of UV-curable, infrared, low-emissivity coatings.

scholarly journals Preparation and Performance of a Waterborne UV/Al Low Infrared Emissivity Coating

2020 ◽  
Vol 10 (18) ◽  
pp. 6423 ◽  
Author(s):  
Xiaoxing Yan ◽  
Lin Wang
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Orthogonal Experiment ◽  
Uv Curing ◽  
Infrared Emissivity ◽  
Nano Silica ◽  
Uv Curable ◽  
Powder Concentration ◽  
Al Powder ◽  
Silica Slurry

An Al powder filler, nano silica slurry and KH560 were mixed with a prepared waterborne UV-curable coating, and the coating was optimized by an orthogonal experiment. Influences of the Al powder concentration on the gloss, infrared emissivity, brightness, mechanical properties, corrosion resistance and other related properties of the coating were further discussed. The results show that the influence of the Al powder concentration on the gloss was more significant, followed by the UV curing time and nano silica slurry concentration. After studying the key role of the concentration of the Al powder, we found that as the concentration of the Al powder is augmented from 10.0% to 25.0%, the gloss lessened from 19.1% to 8.5%. As the concentration of the Al powder was augmented from 10.0% to 40.0%, the infrared emissivity lessened from 0.649 to 0.083 and the brightness L’ value of the coating was step-by-step augmented and inclined to be stable; in addition, the coating’s mechanical properties reached an excellent level. The coating containing 25.0% Al powder had the best corrosion resistance, surface morphology and comprehensive properties, which can potentially be used for infrared stealth technology.

scholarly journals Preparation and Characterization of Low Infrared Emissive Aluminum/Waterborne Acrylic Coatings

Coatings ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 35 ◽  
Author(s):  
Xiaoxing Yan ◽  
Lin Wang ◽  
Xingyu Qian
Keyword(s):  
Corrosion Resistance ◽  
Impact Resistance ◽  
Infrared Emissivity ◽  
Drying Time ◽  
Powder Concentration ◽  
Orthogonal Experiments ◽  
Adhesion Level ◽  
Small Change ◽  
Silica Slurry ◽  
The Impact

An aluminum/waterborne acrylic coating was developed by orthogonal experiments, and the gloss, emissivity, chromatic distortion, hardness, adhesion, impact resistance, and corrosion resistance of the coatings were examined. The results showed that the effect of drying time on the infrared emissivity of coatings was more significant than that of the Al powder concentration and nano-silica slurry. When the drying time was prolonged from 0.5 to 6.0 min, the gloss of the coating decreased slowly and the gloss remained low. The infrared emissivity first decreased and then increased. The infrared emissivity of coatings dried for 2.0 min was better. The L’ value gradually decreased and showed a small change of range. With the increasing of the drying time, the hardness of the coating gradually decreased and was the highest at 0.5–2.0 min. The drying time had no effect on the adhesion level. The impact resistance of the coating was better during the drying period of 1.0–3.0 min. The corrosion resistance of the coating was better at 2.0 min. When the drying time was 2.0 min, the waterborne coating showed the better comprehensive performance. This study provides new prospects in using low infrared emissive coatings for infrared stealth and compatibility with visible light.

Study on the Curing Kinetics of UV-Curable Inkjet Ink

2010 ◽  
Vol 174 ◽  
pp. 397-400 ◽  
Author(s):  
Ping Xiu Ni ◽  
Xian Fu Wei ◽  
Pei Qing Huang ◽  
Wei Wei
Keyword(s):  
Elastic Modulus ◽  
Induction Period ◽  
Functional Groups ◽  
Uv Curing ◽  
Curing Kinetics ◽  
Curing Time ◽  
Uv Curable ◽  
Functional Monomers ◽  
The Relationship ◽  
Kinetics Of

In order to make different UV curing inkjet ink system and test the relationship between the dynamic elastic modulus and UV curing time, the same monomer and pre-polymer were mixed in different proportions, and different functional monomers and pre-polymer were mixed. The results show that the larger the proportion of the pre-polymer and the greater the number of monomer functional groups, the shorter the induction period of the UV curing of UV inkjet ink system and the faster the UV curing rate. Then, the UV curing kinetics of UV inkjet inks was analyzed preliminarily.

UV-Curable Organic-Inorganic Hybrid Films Based on Epoxynorbornene Linseed Oils

2011 ◽  
Vol 217-218 ◽  
pp. 294-299
Author(s):  
Jian Yun He ◽  
Jin Ping Xiong ◽  
Bing Qian Xia
Keyword(s):  
Linseed Oil ◽  
Silica Content ◽  
Coating Properties ◽  
Hybrid Films ◽  
Nano Silica ◽  
Pencil Hardness ◽  
Uv Curable ◽  
Inorganic Hybrid ◽  
Silica Coatings ◽  
Wetting Properties

Epoxynorbornene linseed oil (ENLO) is a new kind of epoxide from renewable sources. An UV-curable organic/inorganic hybrid films using epoxynorbornene linseed oils (ENLO) and surface treated nano-silica were formulated. The mechanical properties，thermal properties and coating properties of the ENLO /silica coatings were evaluated as the function of nano-silica content. The results indicated that after incorporating the nano-silica, the strength, modulus and glass transition temperature of the hybrid films enhanced, while the elongation at break decreased. The nano-silica also improved the hybrid coating properties such as pencil hardness, solvent resistance and surface wetting properties. The morphology observation of the films by atomic force microscopy (AFM) showed that the average silica particle size was ~ 70 nm and the particles were well-dispersed in the organic phase.

UV-Curable organic-inorganic hybrid films based on tetraethylorthosilicate oligomer and special acrylated polyester

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Jianyun He ◽  
Jinping Xiong ◽  
Bingqian Xia
Keyword(s):  
Uv Light ◽  
Uv Curing ◽  
Organic Matrix ◽  
Dynamic Mechanical Properties ◽  
Hybrid Films ◽  
Uv Curable ◽  
Inorganic Hybrid ◽  
Dynamic Mechanical ◽  
H Nmr ◽  
Uv Curing Process

AbstractOrganic-inorganic hybrid films were prepared using tetraethylorthosilicate (TEOS) oligomer and special acrylated polyester (SAP) via a UV-curing process. TEOS oligomers were prepared in the presence of water and ethanol using hydrochloric acid as the catalyst and characterized using 1H NMR, 29Si NMR and MALDI-TOF mass spectra. Special acrylated polyester was synthesized by 1,4-cyclohexane dimethanol, neopentyl glycol, 1,4-butanediol, maleic anhydride, adipic acid, and acrylic acid. Hybrid films were cured by UV light and the thermal properties, dynamic mechanical properties, and tensile properties of the hybrid films were evaluated as the function of TEOS oligomer content. The morphology of the hybrid films was examined using atomic force microscopy (AFM). The microscopy and dynamic mechanical data indicated that the hybrid films were heterogeneous materials with various inorganic particle sizes dispersed within the organic matrix. The results indicated that after incorporating the TEOS oligomer, the strength and thermal stability of the hybrid films were enhanced.

scholarly journals Improving UV Curing in Lignin-Containing Photopolymers for Stereolithography by Chemical Reduction and Acetylation

2019 ◽  
Author(s):  
Jordan T. Sutton ◽  
Kalavathy Rajan ◽  
David P. Harper ◽  
Stephen Chmely
Keyword(s):  
Thermal Stability ◽  
Chemical Modification ◽  
Chemical Reduction ◽  
Uv Curing ◽  
Uv Absorption ◽  
Uv Curable ◽  
Reduction Reactions ◽  
Commercial Use ◽  
Resin Formulation ◽  
Modified Lignin

Despite recent successes incorporating lignin into photoactive resins, lignin photo-properties can be detrimental to its application in UV-curable photopolymers, especially to customized, engineered resins for use in stereolithography printing. We report on chemical modification techniques employed to reduce UV absorption in lignin and the resulting mechanical, thermal, and cure properties in these lignin-containing materials. Pine lignin was modified using acetylation and reduction reactions and incorporated into a printable resin formulation. Modified lignin displayed enhanced printing properties because UV absorption at the 3D printable range was reduced in all acylated lignin from 25% up to greater than 60%. Resins made with the modified lignin showed increased stiffness and strength with lower thermal stability. Investigating these techniques is an important step in developing lignin for use in UV-curing applications and furthers the effort to valorize lignin toward commercial use.

Formation of Barrier Ribs via Micro Molding Process Using UV-Curable Paste

2007 ◽  
Vol 534-536 ◽  
pp. 1029-1032
Author(s):  
Yong Seog Kim ◽  
Tae Gum Koh ◽  
Yoo Seong Kim
Keyword(s):  
Uv Curing ◽  
Processing Route ◽  
Curing Process ◽  
Plasma Display Panel ◽  
Molding Process ◽  
Uv Curable ◽  
Processing Cost ◽  
Plasma Display ◽  
Uv Curing Process ◽  
Sintering Shrinkage

In an attempt to reduce processing cost and to improve the resolution of PDPs, a micro mold transfer processing route for barrier ribs of plasma display panel was attempted. In this study, the parameters that may cause defects during the process were identified, which include the shrinkage during the UV curing process, stress due to the evaporation of organic components, and sintering shrinkage. Considering such parameters, a UV curable paste was developed and the barrier ribs of PDPs were successfully processed via the process. This work demonstrated the possibility of a build-up route in manufacturing barrier ribs of PDP

Synthesis of a novel UV-curable oligmer 1,4-cyclohexanedimethanol glycidyl ether acrylate and study on its UV-curing properties

2014 ◽  
Vol 29 (6) ◽  
pp. 1283-1289 ◽  
Author(s):  
Biwu Huang ◽  
Chong Deng ◽  
Qinchang Xu ◽  
Weiqing Chen ◽  
Huaihua Zou
Keyword(s):  
Glycidyl Ether ◽  
Uv Curing ◽  
Uv Curable

Study on the Combination Mechanism of the Water-Based UV Curable Ink and Paper

2015 ◽  
Vol 731 ◽  
pp. 488-491
Author(s):  
Fu Qiang Chu ◽  
Yu Xin Liu ◽  
Chang Li Xu
Keyword(s):  
Uv Curing ◽  
Curing Process ◽  
Double Bonds ◽  
Negative Effects ◽  
Uv Curable ◽  
Low Viscosity ◽  
Water Based ◽  
Ft Ir ◽  
Epoxy Acrylate Prepolymer

The bonding mechanism between water-based UV curable ink and active groups on paper’s fiber during curing process was studied in this paper. Low viscosity water-based UV-cured resin was synthesized by epoxy resins, epoxy diluent, acrylic acid and maleic anhydride in the presence of catalyst. The viscosity of the synthesis system and synthetic products were significantly reduced when epoxy diluent was added to replace parts of the epoxy resin. Epoxy diluent was very useful in reducing the viscosity of the product, but over-dose would have negative effects on the quality of the cured film. The water-based epoxy acrylate prepolymer was used as the substitution for the ink to investigate the binding mechanism between the active groups of prepolymer and fiber under UV irradiation. The prepolymer and photoinitiator were mixed and the mixture was diluted to an appropriate viscosity by a small amount of water, then printed on the paper by the method of analog printing and curred by UV curing machine. The printed paper was used to extract lignin by enzymatic/mild acidolysis. FT-IR was used to characterize the changes of the active groups in lignin. The results showed that the changes of active groups in lignin were founded in the existence of ultraviolet and photoinitiator, which consistent with the change of double bonds in prepolymer. The free radicals produced by photoinitiator in curing process not only promoted the double bonds to polymerize, but also accelerated the active groups of lignin binding. Experiments show that chemical bonds exist between them.

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