纤维素纳米晶改性光固化水性聚氨酯丙烯酸酯及其性能研究
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摘要
以纤维素纳米晶(CNC)作为添加物,对紫外光固化水性聚氨酯丙烯酸酯(UV-WPUA)进行共混改性。通过实时红外、转矩流变仪、紫外-可见光分光光度计、扫描电子显微镜(SEM)、电子万能试验机等表征手段探究了CNC的添加量对复合树脂及其光固化涂层的性能影响。结果表明:当CNC的添加量为2%时,CNC颗粒在复合树脂中分散性良好,复合涂层的可见光透过率大于85%,铅笔硬度3H,附着力0级,拉伸强度9. 8 MPa,复合涂层的综合性能最好。
The title cellulose nanocrystals(CNC)was used as additive to modify the UVcurable waterborne polyurethane acrylate(UV-WPUA)resin by blending. The properties of the blended resin and the cured coatings were characterized by real-time fourier transform infrared spectroscopy(real-time FT-IR),torque rheometer,UV-Vis spectrophotometer,scanning electron microscope(SEM)and electronic universal testing machine. The results showed that when the incorporation level of CNC was 2 wt%,it was dispersed well in the blended resin and the comprehensive properties of the coatings was the optimal:transmittance in visible range was higherthan 85%,pencil hardness 3 H,adhesion 0 grade,tensile strength 9.8 MPa.
The title cellulose nanocrystals(CNC)was used as additive to modify the UVcurable waterborne polyurethane acrylate(UV-WPUA)resin by blending. The properties of the blended resin and the cured coatings were characterized by real-time fourier transform infrared spectroscopy(real-time FT-IR),torque rheometer,UV-Vis spectrophotometer,scanning electron microscope(SEM)and electronic universal testing machine. The results showed that when the incorporation level of CNC was 2 wt%,it was dispersed well in the blended resin and the comprehensive properties of the coatings was the optimal:transmittance in visible range was higherthan 85%,pencil hardness 3 H,adhesion 0 grade,tensile strength 9.8 MPa.
引文
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[2] YUAN C,WANG M,LI H,et al. Preparation and properties of UV-curable waterborne polyurethane-acrylate emulsion[J].Journal of Applied Polymer Science,2017,134(34):45208-45218.
[3] TAN J,LIU W,WANG Z. Preparation and performance of waterborne UV-curable polyurethane containing long fluorinated side chains[J]. Journal of Applied Polymer Science,2017,134(8):44506-44515.
[4]张文君,张海召,杨永登,等.新型水性紫外光固化聚氨酯丙烯酸酯的制备及性能[J].涂料工业,2016,46(8):58-63.
[5] CHEN S L,ZHANG S D,LI Y F,et al. Synthesis and properties of novel UV-curable hyperbranched waterborne polyurethane/Fe3O4nanocomposite films with excellent magnetic properties[J]. RSC Advances,2014,5(6):4355-4363.
[6] CHOI H Y,BAE C Y,KIM B K. Nanoclay reinforced UV curable waterborne polyurethane hybrids[J]. Progress in Organic Coatings,2010,68(4):356-362.
[7] XU J,JIANG Y,QIU F,et al. Synthesis,mechanical properties and iron surface conservation behavior of UVcurable waterborne polyurethane-acrylate coating modified with inorganic carbonate[J]. Polymer Bulletin,2018,75(10):4713-4734.
[8]李金玲,王宝辉,李莉,等.纳米改性水性聚氨酯的研究进展[J].涂料工业,2010,40(8):70-72.
[9]吴国民,刘贵锋,陈健,等.纤维素纳米晶须复合水性树脂体系的流变行为与性能[J].涂料工业,2015,45(6):1-6.
[10] MARIANO M,EL KISSI N,DUFRESNE A. Cellulose nanocrystal reinforced oxidized natural rubber nanocomposites[J].Carbohydrate polymers,2016,137:174-183.
[11] NETO W P F,MARIANO M,DA SILVA I S V,et al.Mechanical properties of natural rubber nanocomposites reinforced with high aspect ratio cellulose nanocrystals isolated from soy hulls[J]. Carbohydrate polymers,2016,153:143-152.
[12] ABRAHAM E,KAM D,NEVO Y,et al. Highly modified cellulose nanocrystals and formation of epoxynanocrystalline cellulose(CNC)nanocomposites[J]. ACS applied materials&interfaces,2016,8(41):28086-28095.
[13]罗晓民,刘蕊,张鹏,等.可聚合纳米SiO2改性光固化水性聚氨酯胶膜性能研究[J].功能材料,2015,46(2):9-14.
[14] XU H,QIU F,WANG Y,et al. UV-curable waterborne polyurethane-acrylate:preparation,characterization and properties[J]. Progress in Organic Coatings,2012,73(1):47-53.
[15]苏嘉辉,黄伟,杨雪娇,等.多官能度聚氨酯丙烯酸酯水性UV树脂的合成与性能表征[J].高分子材料科学与工程,2015,31(1):13-18.
[16] WANG T,NI M J,LUO Z Y,et al. Viscosity andaggregation structure of nanocolloidal dispersions[J].Chinese Science Bulletin,2012,57(27):3644-3651.
[17] FURTAK-WRONA K,KOZIK-OSTRóWKA P,JADWISZCZAK K,et al. Polyurethane acrylate networks includingcellulose nanocrystals:a comparison between UV and EB-curing[J]. Radiation Physics and Chemistry,2018,142:94-99.
[18] SOW C,RIEDL B,BLANCHET P. Kinetic studies of UV-waterborne nanocomposite formulations with nanoaluminaand nanosilica[J]. Progress in Organic Coatings,2010,67(2):188-194.
[19] BONINO C A,SAMOREZOV J E,JEON O,et a??l. Real-time in situ rheology of alginate hydrogel photocrosslinking[J].Soft Matter,2011,7(24):11510-11517.
[20] ALOUI H,KHWALDIA K,HAMDI M,et al. Synergisticeffect of halloysite and cellulose nanocrystals on thefunctional properties of PVA based nanocomposites[J].ACS Sustainable Chemistry&Engineering,2016,4(3):794-800.
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