Coatings
·
2020
·Vol. 10
·期 5
·494
·
IF 2.436
Jiajia Chang,Xiaoqing Wang,Jian Shao,Xiaomeng Li,Wei Xin,Yunjun Luo
A series of self-matting waterborne polyurethanes (WPUs) were successfully prepared by introducing hydrophilic units into both soft and hard segments. By employing a polycaprolactone polyol containing carboxylate groups within the polymer chains to provide hydrophilicity directly, the matting performance of WPU films was greatly improved. The chemical structures of the WPU resins were confirmed by FTIR spectroscopy, and the morphology of WPU films was observed by SEM. The parameters of WPU preparation were investigated in detail. It was found that the surface gloss of WPU films as well as the particle sizes of WPU dispersions were closely associated with the content of hydrophilic units. As the content of carboxylates or sulfonates increased, the particle sizes of WPU decreased, while the gloss increased gradually. When the particle sizes of dispersions were greater than 3 μm, the gloss of WPU films coated on a leather surface was lower than 1. The results of TG showed that, the initial decomposition temperatures of WPU films were higher than 280 °C, which indicated these films also had good thermal stability. The prepared self-matting WPU coatings would have potential application prospects in the field of leather finishing.Keywords:self-matting;waterborne polyurethane;leather finishing
研究领域:
材料科学
·
高分子化学
·
涂料技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2017
·Vol. 67
·期 1
·78-84
·
IF 2.07
Zhe Sun,Haojun Fan,Yi Chen,Junjiang Huang
The effect of structural factors, including the type of diisocyanates and glycols, degree of crosslinking, hard-segment content, crystallinity and hydrophilic group content, on optical properties of waterborne polyurethane (WPU) was investigated. Based on the relationship between structure and properties, a series of self-matting WPUs with excellent transmittance were synthesized. Results demonstrated that refractive index of constituent groups was an important factor to influence the optical properties of coatings. For multiphase polyurethane, aromatic ring, ester bond, NH COO and urea groups with high refractive index could decrease the matting effect and transmittance. Higher hard-segment content resulting in an increase of the number of NH COO or urea bonds also decreased the matting effect and transmittance. The aggregation structure of WPU was another factor to influence the optical properties of coatings. Crystalline soft and hard segment domains could decrease the transmittance and matting effect, whilst non-crystalline segments, pendent groups and crosslinking destroyed the regularity or crystallinity of macromolecules, behaving as an auxiliary function to improve the transmittance. The particle size of WPU was of great importance for the matting effect. Smaller particle size (<5.0 µm) would endow the coating with a smoother surface and higher reflected light ratio, and thus the expected matting effect was hard to be achieved. A larger particle size could improve the matting effect but impart to the coating a coarse surface and hand-feel. When the 2,2-bis(hydroxymethyl)propionic acid content was 1.6 wt%, spherical particles with a size distribution of 7–8 µm were aggregated on the coating surface, giving the coating an excellent matting effect and hand-feel. © 2017 Society of Chemical Industry
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 48
·19193-19199
·
IF 3.069
Yeyun Meng,Peng Lv,Qi Liu,Bing Liao,Hao Pang,Weiqu Liu
This work aims to explore the feasibility of self-matting coatings based on soybean oil. A novel reactive waterborne polyurethane (RWPU) dispersion containing unsaturated CC double bonds was synthesized from epoxidized soybean oil (ESO). Subsequently, the RWPU dispersion was copolymerized with hard/soft monomers at different weight ratios to prepare polyurethane/acrylate (MPU) hybrid emulsions. The results reveal the gloss levels of MPUs to be as low as 3.3 gloss units at 60°. A scanning electron microscope and three-dimensional surface profilometer were employed to observe the morphology of the MPU-based films, and the relation between the surface roughness and gloss was determined. Further, thermal gravimetric analysis was conducted to determine the thermal stability of the MPU-based films, and the results denoted that these MPU-based films exhibited excellent thermal stability. Tensile tests indicated that the RWPU dispersion, which was copolymerized at a hard monomer weight of 30%, exhibited a good tensile strength of 13.2 MPa and a high elongation percentage of 578%. Furthermore, after one year, the MPU emulsions exhibited a narrow particle size distribution and their zeta potential values were approximately −30.0 mV, revealing the excellent storage stabilities (>one year) of all the MPU emulsions.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 44
·27620-27626
·
IF 3.361
Zhixian Lin,Zhe Sun,Chengping Xu,Aiqin Zhang,Jun Xiang,Haojun Fan
Due to the paradox between abrasion-resistance and extinction, the development of a self-matting waterborne polyurethane (SMWPU) coating accompanied by excellent abrasion-resistance is still a challenge. Herein, a kind of hydroxyalkyl-terminated polysiloxane modified SMWPU was prepared and employed for matting leather/synthetic leather finishing. Simultaneously, the influences of hydrophilic chain extender and polysiloxane loadings on the matting effect and abrasion resistance of the coating were investigated in detail. The results indicated that the gloss of the coating was closely related to the hydrophilic chain extender content, and a stable emulsion and optimal matting effect could be achieved when a 1.6 wt% (based on solid content) hydrophilic chain extender was employed. With the introduction of polysiloxane, the silicon element content on the coating surface increased from 0% to 9.26%, just as expected, and an enhanced abrasion resistance of the coating was obtained. Specifically, the coating weight loss ratio was reduced from 2.36 wt% to 0.41 wt%, and obvious surface damage did not occur after 500 abrasions. Although the surface roughness and matting effect of the coating decreased slightly due to the introduction of silicone, the gloss of the modified coating was less than 1.5° (60° incidence angle), still exhibiting an excellent matting effect. Another interesting result was the elevation of anti-hot-pressing, compared with that of the unmodified one, and the gloss of the modified coating showed no changes under a 10 MPa, 150 °C hot-pressing condition.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 6
·1963-1976
·
IF 2.3
Niu Pengfei,Pan Weichen,Wang Wei,Wang Meng,Zhang Bao,Yang Junfeng,Peng Xiaohong
Self-matting waterborne polyurethane (WPU) with a rough surface suffers from poor wear resistance, which inevitably hinders its service span. Here, wear-resistant and self-matting WPU resin was prepared via using hydroxypropyl-terminated polydimethylsiloxane (PDMS) in the preparation of prepolymer and N -2-aminoethyl-3-aminopropyltrimethoxysilane (KH-792) as a post-chain extender. The effects of PDMS, 2, 2-Bis(hydroxymethyl)propionic acid (DMPA), and KH-792 on its morphology, particle size, gloss, wear resistance, and hydrophilicity of WPU were also investigated. The gloss of WPU coatings was found to be negatively correlated with the amount of DMPA. Moreover, the matting effect and the wear resistance of WPU were significantly enhanced by the introduction of PDMS and KH-792. When the content of PDMS, DMPA, and KH-792 was 6 wt%, 2.2 wt%, and 40 mol% respectively, the gloss was 3.2 GU, and the wear mass loss was only 6.6 mg, which was 64% lower than that without silicone-modified. This work could provide a new idea for the preparation of wear-resistant and self-matting coatings.
研究领域:
材料科学
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高分子化学
·
表面工程
·
涂层技术
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 31
·e55734
·
IF 2.7
Yeyun Meng,Shengyuan Liang
A green method to synthesize self-matting waterborne polyurethane acrylic hybrid emulsion with hydrophobic function is introduced in this study. A reactive waterborne polyurethane (RWPU) dispersion containing unsaturated CC double bonds was prepared from epoxidized soybean oil. Subsequently, the RWPU dispersion was copolymerized with fluorinated monomers of different carbon chain lengths to prepare polyurethane acrylic hybrid emulsion (PUF). The results revealed the gloss levels of PUF films to be as low as 12.4 gloss units at 60°. The morphology of PUF films was observed by scanning electron microscope and three-dimensional surface profilometer, and the relationship between surface roughness and gloss was discussed in detail. In addition, thermal gravimetric analysis was conducted to determine the thermal stability of the PUF films, and the results denoted that these PUF films exhibited excellent thermal stability. Comprehensive performance tests indicated that the RWPU dispersion, which was copolymerized with hexafluorobutyl methacrylate at a weight of 10%, exhibited a low gloss, a high contact angle of 120°, and a high elongation percentage of 423%. Furthermore, the dynamic light scattering results showed small average particle size, revealing the excellent storage stabilities.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Taoling Xie,Weiyao Kao,Zetian Zhang,Yang Liu,Zhengjun Li
A new type of low gloss waterborne self-matting acrylate polymer with core-shell structure was successfully synthesized. The organosilane ϒ-methacryloxy propyl trimethoxyl silane (ϒ-MPS) was used as a crosslinking agent, which can control and modulate the surface micro-roughness of acrylate polymer films. The self-matting acrylate polymer has good latex stability containing no external powdery matting agent. In particular, the gloss value can reach as low as 6.3 units at an incident of 60° when the amount of ϒ-MPS is 7% based on the total mass of the shell monomer. Moreover, the main factors affecting glossiness, such as crosslinking degree, surface roughness, migration of organosilicon moieties to the surface and phase separation, were studied in detail. The observation by scanning electron microscope and atomic force microscope indicated that the surface roughness was elevated with the increase of the ϒ-MPS content. Besides, the transmission electron microscope observation and differential scanning calorimeter analysis revealed that the acrylate polymers displayed microphase separation behavior, which combined with the surface roughness could increase the scattered and diffused lights, thereby endowing the coating with the matte effect. In addition, due to the incorporation of ϒ-MPS, the crosslinking density and hydrophobicity increased, and thereby thermal stability, tensile strength and water resistance of the films were also improved. Therefore, this work provides practical prospects for the industrial application of organosilicon modified acrylate polymer in the field of matte coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Bao Zhang,Tao Zou,Meng Wang,Weichen Pan,Junfeng Yang,Xiaohong Peng
Self-matting waterborne polyurethane (WPU) with rough surface is often accompanied by poor antibacterial property, which greatly limits its service life. Here, a gemini quaternary ammonium (GQM) with hydrophilic and antimicrobial properties was designed and synthesized. 1,3,5-tris (2-hydroxyethyl) hexahydro-1,3,5-Triazine (TNO) was used as a crosslinking agent, and GQM was selected as chain extender to prepare antibacterial and self-matting WPU resin. The effects of TNO and GQM on the morphology, particle size, gloss, antibacterial rate, and hydrophilicity of WPU were investigated. The results showed that the introduction of TNO and GQM significantly enhanced the self-matting effect and antibacterial activity of WPU. When the contents of TNO and GQM were 1.2 wt % and 4 wt %, the average particle size of emulsion was 6.53 μm, the gloss of coating was 11.05 GU. It is also significant to be noted that the antibacterial rates of S. aureus and E. coli were 95.69 % and 95.18 %, respectively. This prepared WPU was endowed with self-matting and antibacterial properties simultaneously. This finding can provide a novel insight into the research of antibacterial polymers and antiglare coatings.
研究领域:
材料科学
·
高分子化学
·
抗菌材料
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Wenqiang Yang,Yushu Zhang,Shufang Wu,Ting Zhang,Zhiquan Li,Xiaoxuan Liu
In order to solve the problems of low density and high brittleness prevailing in traditional matte materials with added matting agents. Herein, a series of self-matting waterborne polyurethane acrylate emulsions (SMWPUA) with rough surfaces, low gloss, and core-shell structures were synthesized by varying the mass ratio of added acrylate monomers using a double-bond capped waterborne polyurethane (WPU) and a polyacrylate as the substrate using the core-shell emulsion polymerization method. Successful synthesis of resins containing core-shell structures demonstrated by Fourier infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy and scanning electron microscope (SEM). Tests such as atomicforce microscopy (AFM) showed that the synthesized emulsions were able to have a good matting effect, which was attributed to the increase in surface roughness and the increase in particle size. Emulsion particle size test was used to explore the variation of emulsion particle size. The thermal stability and hardness changes of SMWPUA and WPU were explored by TGA test and pencil hardness test. The results showed that with the increase of hard acrylate monomer content of SMWPUA, the surface gloss of the coating film was lower, the surface roughness of the cured film was larger, the glass transition temperature was increased, and the emulsion particle size was reduced. SMWPUA has better thermal stability and hardness than WPU.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Qi Liu,Bing Liao,Hao Pang,Mangeng Lu,Yeyun Meng
A series of semi-gloss waterborne polyurethane-polyacrylate (PUA) hybrid dispersions containing different weight ratios of styrene/butyl acrylate monomers were first synthesized by solution polymerization and then phase inversion. The average particle size of PUA dispersions particle was analyzed by dynamic light scattering (DLS) measurement. Its core-shell morphology was characterized by transmission electron microscopy (TEM), whose structure was also confirmed by FTIR and nuclear magnetic resonance carbon spectroscopy ( 13 C-NMR). The surface morphology of the PUA films was observed by scanning electron microscopy (SEM). The thermal properties of the PUA films were characterized by differential scanning calorimetry (DSC) analysis, and the core-shell hybrid latex films showed phase separation behaviors. The results showed that the PUA films had a self-rough surface, and exhibited excellent adhesion strengths and good hardness.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 5
·1579-1594
·
IF 2.3
Lin Ruijun,Yin Xingshan,Liu Huameng,Chen Lijing,Wu Jianxin,Liu Liang,Gu Yuxin,Li Yong,Lin Xiaofeng,Lin Wenjing,Yi Guobin
Self-matting acrylate has attracted much interest due to excellent weather resistance, hardness, water resistance, and chemical resistance. However, the poor mechanical properties of acrylate limit its application in coatings. To overcome this problem, a series of self-matting acrylate emulsions (SMAE) modified by xylitol-based hyperbranched urethane acrylate (HP-IH) were successfully synthesized. The results revealed that the amount of emulsifier was the primary factor affecting the gloss of the films. Upon the incorporation of HP-IH, the elongation at break and fracture energy of the SMAE films were significantly improved by 52.6% and 59.6%, respectively, due to the internal plastic effect and increased crosslink density induced by HP-IH. The S-2-1.5 sample exhibited the excellent comprehensive performance, i.e., tensile strength of 12.7 MPa, elongation at break of 952%, fracture energy of 71.1 MJ/m 3 , adhesion of 5B, temperature of 5% weight loss at 350 °C, and gloss at 60° of 14.8, respectively, indicating its great application potential in the field of low-gloss coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 33
·13971-13978
·
IF 3.288
Yeyun Meng,Qiwen Yong,Bing Liao,Wei Zeng,Hao Pang
A novel method to prepare crosslinked acrylate self-matting coatings is introduced in this study. Pentaerythritol tetraacrylate (PET4A) was used as a cross-linker to synthesize a series of self-matting crosslinked acrylate coatings (PETs). The gloss value of the PET films was found to decrease as the amount of the cross-linker increased at the three typical incident angles of 20°, 60°, and 85°. Furthermore, the factors that affect glossiness including phase separation, cross linking density, the film-forming temperature, and the film-forming thickness were investigated. PET films provided a transparency of 84% with only 5 wt% of PET4A addition and exhibited a gloss of 5.0 (60°), which illustrates the advantage of using PETs in low-gloss aqueous coatings. In addition, the results of thermogravimetric analysis showed that the PET films exhibit excellent thermal stability. Furthermore, the PET emulsions exhibited a narrow particle size distribution, with a zeta potential of approximately −30.0 mV, revealing their excellent storage stability.
研究领域:
材料科学
·
高分子化学
·
涂料技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）