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学者姓名:罗耀发
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LED curing technology makes up for some drawbacks of UV mercury lamps with its merits of no ozone emission and low energy consumption, and gradually replaces traditional UV mercury lamps in numerous fields. Nevertheless, a solitary LED curing coating struggles to fulfill the requirements in terms of curing depth, curing chroma, and comprehensive performance. Based on these, four types of polyurethane acrylate (PUA) coatings were fabricated through two-step synthesis and LED/moisture dual curing technology using cycloaliphatic isocyanate (IPDI), aliphatic isocyanate (HDI), monofunctional acrylate (HEMA), and trifunctional acrylate (PETA) as the primary raw materials. The dual curing system integrates the advantages of LED curing and moisture curing, and mitigates the shortcomings of incomplete curing and poor comprehensive performance of single LED. The experimental results show that these four dual-curing coatings show a certain degree of optimization in comprehensive properties such as curing properties, thermal properties, mechanical properties, and coating properties. In particular, the dual-curing coating prepared with HDI as the hard segment and PETA as the endcapping agent has a surface drying time of only 5 s. After dual curing, the gel content, water contact angle, tensile strength, shear strength, hardness, and adhesive force of the sample can respectively reach 97.8 %, 112.4 degrees, 17.26 MPa, 3.7 MPa, 58.5 Shore D, and 5 B. Additionally, the coating also exhibited outstanding solvent resistance, with the absorption rates of 0.35 %, 8.42 %, 1.35 %, and 1.16 % respectively after 48 h immersion in water, ethanol, 10 wt% NaOH, and 10 wt% HCl solutions. It is also notable that the curing depth of the dual-cured coating can reach 8.96 mm, which is significantly higher than the 3.76 mm of the single light curing, and the colored curing is complete. Four kinds of coatings can be selected and customized in accordance with diverse application requirements, which is of great significance for the further development of environmental protection coatings and holds substantial practical value in industrial production.
Keyword :
Comprehensive properties Comprehensive properties Isocyanate group Isocyanate group LED/moisture dual-curing system LED/moisture dual-curing system Polyurethane acrylate Polyurethane acrylate
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GB/T 7714 | Luo, Yaofa , Liu, Guang , Xu, Pingfan et al. Structural design and preparation of LED/moisture dual-cured polyurethane acrylate coatings with comprehensive properties [J]. | PROGRESS IN ORGANIC COATINGS , 2025 , 200 . |
MLA | Luo, Yaofa et al. "Structural design and preparation of LED/moisture dual-cured polyurethane acrylate coatings with comprehensive properties" . | PROGRESS IN ORGANIC COATINGS 200 (2025) . |
APA | Luo, Yaofa , Liu, Guang , Xu, Pingfan , Ding, Ao , Zhang, Peikun , Zhang, Pengfei et al. Structural design and preparation of LED/moisture dual-cured polyurethane acrylate coatings with comprehensive properties . | PROGRESS IN ORGANIC COATINGS , 2025 , 200 . |
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Due to the fact that single UV-cured coatings frequently fail to fulfill the requirements in terms of depth and chroma, and do not reach the ideal state in terms of comprehensive performance. In order to solve these painpoints more effectively, the sulfhydryl-modified castor oil (COME) was successfully synthesized by introducing beta-mercaptoethanol onto the plant-based material castor oil (CO) through the thiol-ene clink reaction. Subsequently, the synthesized polyurethane acrylate prepolymer (COPUA), monomer, photoinitiator and thermocuring agent were used as A component, and COME was used as B component. The two were mixed evenly according to a certain proportion, and the modified castor oil based polyurethane acrylate (COMEPUA) coatings were fabricated by UV/thermal dual-curing technology. Based on a series of performance test outcomes, the coating demonstrates excellent comprehensive properties, encompassing mechanical properties (where the shear strength, tensile strength, elongation at break, and hardness can respectively reach 5.26 MPa, 9.92 MPa, 132.55 %, and 47.77 Shore D), coating properties (where the absorption rates after 72 h immersion in water, ethanol, 10 wt% HCl, and 10 wt% NaOH solvents are respectively 0.66, 17.98, 1.89, and 0.71 %, and the volume resistivity and breakdown voltage are respectively 1.74x1016 Omega & sdot;cm and 10 KV) and curing properties (where the curing depth can reach 9.82 mm, which is significantly higher than 3.51 mm of single UV curing, and the colored curing is complete). It can exert protective functions such as anti-corrosion, anti-fouling, and insulation on circuit boards, electronic packaging, and device surfaces, and holds great potential in the application of coating materials.
Keyword :
Comprehensive performance Comprehensive performance Modified castor oil Modified castor oil Polyurethane acrylate Polyurethane acrylate Thiol-ene clink reaction Thiol-ene clink reaction UV/thermal dual-curing system UV/thermal dual-curing system
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GB/T 7714 | Luo, Yaofa , Liu, Guang , Zhang, Pengfei et al. Modified castor oil-based UV/thermal dual-curing polyurethane acrylate coatings with outstanding comprehensive properties [J]. | MATERIALS TODAY COMMUNICATIONS , 2024 , 41 . |
MLA | Luo, Yaofa et al. "Modified castor oil-based UV/thermal dual-curing polyurethane acrylate coatings with outstanding comprehensive properties" . | MATERIALS TODAY COMMUNICATIONS 41 (2024) . |
APA | Luo, Yaofa , Liu, Guang , Zhang, Pengfei , Zhou, Bing , Zhang, Peikun , Xu, Pingfan et al. Modified castor oil-based UV/thermal dual-curing polyurethane acrylate coatings with outstanding comprehensive properties . | MATERIALS TODAY COMMUNICATIONS , 2024 , 41 . |
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P-N-B organic flame retardant was synthesized using 4-formylphenylboronic acid, 4-aminophenylthiophenol, 9,10-dihydro-9-oxa-10-phos-phaphenanthrene-10-oxide (DOPO), and then introduced into the hydroxyl-terminated polybutadiene acrylonitrile (HTBN) molecular chain to successfully prepare a macromolecular flame retardant, which was used to prepare flame retardant waterborne polyurethane. The mechanical properties, thermal properties, and flame retardancy of waterborne polyurethane (FR-WPU) were studied using thermogravimetic analysis (TGA), limiting oxygen index (LOI), scanning electron microscope (SEM), cone calorimeter, and universal testing machine, respectively, and the flame retardant mechanism of macromolecular flame retardants was explored. An LOI value of 29.76% and a UL-94 V-0 rating could be realized when the APFBH conjugation is 7.5 wt%, showing a significant improvement of melt dripping behavior and flame retardancy. It indicated that the fire resistance of FR-WPU remarkably improved and displayed both gas and condensed phase mechanism. As the content of APBDH increased, the tensile strength and the elongation at break of FR-WPU increased firstly and then decreased.
Keyword :
boron boron flame retardancy flame retardancy functionalization of polymers functionalization of polymers waterborne polyurethane waterborne polyurethane
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GB/T 7714 | Luo, Yaofa , Jiang, Ronghua , Xu, Yihao et al. Preparation and performance of waterborne polyurethane coatings based on the intumescent flame retardant of boron, phosphorus, and nitrogen [J]. | JOURNAL OF APPLIED POLYMER SCIENCE , 2024 , 142 (7) . |
MLA | Luo, Yaofa et al. "Preparation and performance of waterborne polyurethane coatings based on the intumescent flame retardant of boron, phosphorus, and nitrogen" . | JOURNAL OF APPLIED POLYMER SCIENCE 142 . 7 (2024) . |
APA | Luo, Yaofa , Jiang, Ronghua , Xu, Yihao , Wang, Hui , Qiu, Zeping , Huang, Jin et al. Preparation and performance of waterborne polyurethane coatings based on the intumescent flame retardant of boron, phosphorus, and nitrogen . | JOURNAL OF APPLIED POLYMER SCIENCE , 2024 , 142 (7) . |
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采用硅烷偶联剂为桥梁将聚六亚甲基双胍盐酸盐(PHMB)接枝在纳米二氧化钛(TiO2)表面制备了 TiO2-PHMB抗菌剂,再将其与聚己二酸-对苯二甲酸丁二酯/聚乳酸(PBAT/PLA)熔融共混造粒并吹制得到PBAT/PLA/TiO2-PHMB生物降解抗菌保鲜膜,研究了不同含量抗菌剂对保鲜膜形态结构、力学性能、热稳定性能、水蒸气透过率及抗菌性能的影响.结果表明,当TiO2-PHMB抗菌剂添加量为1%时,PBAT/PLA/TiO2-PHMB生物降解抗菌保鲜膜的纵横向拉伸强度分别提升了 11.7%和13.7%,断裂伸长率维持在658%和536%,水蒸气透过率降低了 12.50%,对大肠杆菌(E.coli)和金黄色葡萄球菌(S.aureus)的抑菌率分别达到62.70%和84.54%,对新鲜樱桃展现了良好的保鲜效果.
Keyword :
保鲜膜 保鲜膜 抗菌 抗菌 生物降解 生物降解 纳米二氧化钛 纳米二氧化钛 聚六亚甲基双胍盐酸盐 聚六亚甲基双胍盐酸盐
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GB/T 7714 | 孙文涛 , 龚佳荣 , 刘新宇 et al. 聚胍接枝二氧化钛抗菌剂改性聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解保鲜膜的制备与性能 [J]. | 高分子材料科学与工程 , 2024 , 40 (11) : 29-39 . |
MLA | 孙文涛 et al. "聚胍接枝二氧化钛抗菌剂改性聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解保鲜膜的制备与性能" . | 高分子材料科学与工程 40 . 11 (2024) : 29-39 . |
APA | 孙文涛 , 龚佳荣 , 刘新宇 , 许平凡 , 刘源森 , 罗耀发 et al. 聚胍接枝二氧化钛抗菌剂改性聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解保鲜膜的制备与性能 . | 高分子材料科学与工程 , 2024 , 40 (11) , 29-39 . |
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Polymer matrix composites with excellent thermal management performance have emerged as remarkable materials in the realms of microelectronic devices and wireless communication technologies. However, achieving high thermal conductivity in most composites often requires a high filling load, which will compromise other desirable properties. Herein, utilizing physical foaming and vacuum infiltration methods, we introduce a 3D honeycomb composite consisting of surface-hydroxylated hexagonal boron nitride (OH-BN) and epoxy. The 3D OH-BN honeycomb foam in the composite features a lightweight design (0.33 g/cm3), high strength (7178 times its own weight) and prominent heat transfer performance. Significantly, these composites achieve notable thermal properties, including high through-plane thermal conductivity (2.073 W m- 1 K-1) and relatively low thermal resistance (0.995 degrees C/W) at a reduced filling load (17.2 vol%). In comparison with pure epoxy, the through-plane thermal conductivity is enhanced by an impressive 894 %, while the thermal resistance is reduced to 1/9.4 of that observed in pure epoxy. Besides, the 3D honeycomb composites combine outstanding mechanical performance, low dielectric properties and excellent insulation, underscoring their potential in the field of thermal management applications in microelectronic devices, wireless communication systems and integrated circuits.
Keyword :
3D thermal conduction networks 3D thermal conduction networks Boron nitride Boron nitride Epoxy composites Epoxy composites Thermal management Thermal management Thermal resistance Thermal resistance
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GB/T 7714 | Liu, Guang , Ding, Ao , Xu, Pingfan et al. Thermal conductivity of epoxy composites containing 3D honeycomb boron nitride filler [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 489 . |
MLA | Liu, Guang et al. "Thermal conductivity of epoxy composites containing 3D honeycomb boron nitride filler" . | CHEMICAL ENGINEERING JOURNAL 489 (2024) . |
APA | Liu, Guang , Ding, Ao , Xu, Pingfan , Zhu, Minmin , Zhang, Haizhong , Zheng, Yuying et al. Thermal conductivity of epoxy composites containing 3D honeycomb boron nitride filler . | CHEMICAL ENGINEERING JOURNAL , 2024 , 489 . |
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棉织物是目前应用最广泛的天然纤维材料之一。然而,由于棉纤维具有亲水性,使其在很多领域的应用受到限制,如油水分离、室内装饰、汽车内饰、医疗和消防等。为了拓宽棉织物的应用范围,对其进行疏水整理具有非常重要的意义。综述近年来棉织物疏水或疏水阻燃整理研究发展情况,为拓宽棉织物的应用具有很好的理论指导意义。
Keyword :
棉织物 棉织物 疏水整理 疏水整理 纳米涂层 纳米涂层 超疏水 超疏水 阻燃整理 阻燃整理
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GB/T 7714 | 罗耀发 . 棉织物疏水整理研究进展 [J]. | 纺织科技进展 , 2023 , 5 (03) : 13-17 . |
MLA | 罗耀发 . "棉织物疏水整理研究进展" . | 纺织科技进展 5 . 03 (2023) : 13-17 . |
APA | 罗耀发 . 棉织物疏水整理研究进展 . | 纺织科技进展 , 2023 , 5 (03) , 13-17 . |
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Isophorone diisocyanate (IPDI) as reactive compatibilizer was introduced into poly(butylene adipate terephthalate) (PBAT)/polylactic acid (PLA) blend by melt blending and extruded into blown films. The effect of IPDI content on the phase morphology, crystallization behavior, mechanical, thermal and barrier properties of PBAT/PLA/ IPDI blended films were investigated by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), differential scanning calorimeter (DSC), universal tensile testing machine, thermogravimetric analyzer (TGA) and water permeability tester. Results demonstrate that the —NCO groups of IPDI can chemically react with PBAT and PLA to form copolymer, which reduces the particle size of PLA dispersed phase and leads to indistinct interface between the two-phase, effectively improving the interfacial compatibility between PBAT and PLA matrix. With increasing the IPDI content in PBAT/PLA/IPDI films, the crystallization ability of PBAT matrix and tensile strength increase, whilst the water vapor barrier performance increases first and then decreases. When the mass fraction of IPDI is 0.5%, compared with the pristine PBAT/PLA film, the PBAT/PLA/IPDI packaging film shows 74.2% and 28.6% enhancement in tensile strength on the transverse direction and machine direction, respectively, maintains decent breaking elongation of 790% and 244%, meanwhile, 38.2% reduction in water vapor permeability coefficient, which suggests the balanced overall mechanical and water vapor barrier properties. © 2023 Chengdu University of Science and Technology. All rights reserved.
Keyword :
biodegradable biodegradable poly(butylene adipate terephthalate) poly(butylene adipate terephthalate) polylactic acid polylactic acid reactive compatibilization reactive compatibilization water vapor barrier property water vapor barrier property
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GB/T 7714 | Mao, S. , Gong, J. , Sun, W. et al. Structure and Properties of Biodegradable Poly(butylene adipate terephthalate)/ Polylactic Acid Packaging Films with Isophorone Diisocyanate as Reactive Compatibilizer; [异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能] [J]. | Polymeric Materials Science and Engineering , 2023 , 39 (8) : 148-155 . |
MLA | Mao, S. et al. "Structure and Properties of Biodegradable Poly(butylene adipate terephthalate)/ Polylactic Acid Packaging Films with Isophorone Diisocyanate as Reactive Compatibilizer; [异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能]" . | Polymeric Materials Science and Engineering 39 . 8 (2023) : 148-155 . |
APA | Mao, S. , Gong, J. , Sun, W. , Ning, B. , Luo, Y. , Xu, P. et al. Structure and Properties of Biodegradable Poly(butylene adipate terephthalate)/ Polylactic Acid Packaging Films with Isophorone Diisocyanate as Reactive Compatibilizer; [异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能] . | Polymeric Materials Science and Engineering , 2023 , 39 (8) , 148-155 . |
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文章介绍了自主开发的水性微孔型防水透湿膜的防水透湿机理、性能特点以及制备工艺,重点介绍了其在羽绒服面料上的应用优势与特点,最后对其未来发展趋势进行了展望.
Keyword :
制备工艺 制备工艺 发展趋势 发展趋势 机理 机理 防水透湿 防水透湿
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GB/T 7714 | 罗耀发 . 水性微孔型防水透湿膜的开发及在羽绒服面料中的应用 [J]. | 纺织导报 , 2023 , (2) : 30-33 . |
MLA | 罗耀发 . "水性微孔型防水透湿膜的开发及在羽绒服面料中的应用" . | 纺织导报 2 (2023) : 30-33 . |
APA | 罗耀发 . 水性微孔型防水透湿膜的开发及在羽绒服面料中的应用 . | 纺织导报 , 2023 , (2) , 30-33 . |
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以异佛尔酮二异氰酸酯(IPDI)为聚己二酸-对苯二甲酸丁二酯/聚乳酸(PBAT/PLA)共混物的增容剂,通过熔融共混法制备了PBAT/PLA/IPDI共混粒子并吹制得到薄膜。采用红外光谱、扫描电镜、差示扫描量热分析、拉伸试验、热重分析和水蒸气透过率测试等研究了不同含量IPDI对共混薄膜形态结构、结晶性能、力学性能、热性能和阻隔性能的影响。结果表明,IPDI的异氰酸酯基团能与PBAT和PLA发生化学反应,分散相尺寸变小,两相界面变得模糊,有效改善了共混物的相容性。随着IPDI含量的增加,共混物中PBAT的结晶度升高,薄膜的拉伸强度逐渐增大,水蒸气阻隔性能呈现先增大后减小的趋势。当IPDI质量分数为0.5%时,PBAT/PLA/IPDI薄膜的横纵向拉伸强度相较于纯PBAT/PLA薄膜分别提升了74.2%和28.6%,断裂伸长率维持在790%和244%,水蒸气透过率降低了38.2%,表现出良好的力学和水蒸气阻隔等综合性能。
Keyword :
反应增容 反应增容 水蒸气阻隔性能 水蒸气阻隔性能 生物降解 生物降解 聚乳酸 聚乳酸 聚己二酸-对苯二甲酸丁二酯 聚己二酸-对苯二甲酸丁二酯
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GB/T 7714 | 毛帅 , 龚佳荣 , 孙文涛 et al. 异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能 [J]. | 高分子材料科学与工程 , 2023 , 39 (08) : 148-155 . |
MLA | 毛帅 et al. "异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能" . | 高分子材料科学与工程 39 . 08 (2023) : 148-155 . |
APA | 毛帅 , 龚佳荣 , 孙文涛 , 宁博远 , 罗耀发 , 许平凡 et al. 异佛尔酮二异氰酸酯反应增容聚己二酸-对苯二甲酸丁二酯/聚乳酸生物降解阻隔膜的结构与性能 . | 高分子材料科学与工程 , 2023 , 39 (08) , 148-155 . |
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Photocatalysis is a promising technology for removing micropollutants in water. However, developing efficient and stable catalysts remains a challenge. In this work, a novel step-scheme (S-scheme) heterojunction of WO3/SnIn4S8 (WSI) was constructed through the combined process of in situ precipitation with hydrothermal synthesis to simultaneously realize photocatalytic degradation of bisphenol A(BPA) and reduction of Cr(VI) in contaminated water. Results showed that the WSI S-scheme heterojuction has a synergistic effect for the removal of BPA and Cr(VI). An optimum case of the WSI-12% heterojunction exhibited the highest photocatalytic efficiency in the degradation of BPA under visible light, which is ca. 2.5 and 3.8 times more than the pure WO(3 )and SIS, respectively. The enhanced photocatalytic activity is attributed to the formation of the WSI S-scheme heterojunctions which facilitate the spatial separation of charge carriers and preserve strong photoredox ability. Further, the S-scheme mechanism of enhanced photocatalysis was examined by the radical-trapping experiment and ESR, and superoxide and hydroxyl radicals were determined to be the major reactive oxygen species responsible for BPA degradation and Cr(VI) reduction by WSI. This work provides a novel strategy for tailoring high-performance S-scheme heterojunctions and shows the promising application in purifying wastewater with complex pollutants.
Keyword :
bisphenol A bisphenol A hexavalent chromium hexavalent chromium photocatalytic degradation photocatalytic degradation WO3/SnIn4S8 heterostructure WO3/SnIn4S8 heterostructure
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GB/T 7714 | Xu, Pingfan , Zhang, Runqiu , Gong, Jiarong et al. S-Scheme WO3/SnIn4S8 Heterojunction for Water Purification: Enhanced Photocatalytic Performance and Mechanism [J]. | CATALYSTS , 2023 , 13 (11) . |
MLA | Xu, Pingfan et al. "S-Scheme WO3/SnIn4S8 Heterojunction for Water Purification: Enhanced Photocatalytic Performance and Mechanism" . | CATALYSTS 13 . 11 (2023) . |
APA | Xu, Pingfan , Zhang, Runqiu , Gong, Jiarong , Luo, Yaofa , Zhuang, Yihua , Zhang, Peikun . S-Scheme WO3/SnIn4S8 Heterojunction for Water Purification: Enhanced Photocatalytic Performance and Mechanism . | CATALYSTS , 2023 , 13 (11) . |
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