采用3-异氰酸丙基三乙氧基硅烷(IPTS)和二乙醇胺(DEA)自制含乙氧基硅烷侧链的二元醇(Si-2OH);采用异佛尔酮二异氰酸酯(IPDI)、聚碳酸酯二元醇(PCDL)和二羟甲基丙酸(DMPA),自制含硅二元醇(Si-2OH);以季戊四醇三丙烯酸酯(PETA)、三羟甲基丙烷(TMP)为主要原料合成了支链含硅氧烷和脲键的UV固化水性聚氨酯(UV-WPU)。采用FT-IR、1H-NMR对UV-WPU的结构进行表征,采用光学接触角测量仪、紫外分光光度计、热重分析仪等对涂膜的性能进行表征与测试,同时探究Si-2OH添加量对UV-WPU及其涂膜性能的影响。结果表明,Si-2OH的引入使得水UV-WPU涂膜的疏水性、耐水性、热稳定性、拉伸强度和附着力等性能均有所提高。
(3-isocyanatopropyl)triethoxysilane(IPTS) and diethanolamine(DEA) were used to prepare diol with ethoxysilane side groups(Si-2OH).Isophorone diisocyanate(IPDI),polycarbpnate diol(PCDL),dimethylolpropionicacid (DMPA),silicon-containing (Si-2OH),pentaerythritol triacrylate(PETA) and trimethylolpropane(TMP)were used as the main rawmaterial to synthesize UV-curing waterborne polyurethane(UV-WPU)with siloxane and urea bonds in the side chain.The structure of the UV-WPU was characterized by FT-IR and 1H-NMR.Optical contact angle measuring instrument,UV spectrophotometer,thermogravimetric analyzer,etc.were used to characterize and test the performance of the coating film,which explored the effect of the change of Si-2OH addition on the properties of the WPU and its film.The results shown that the introduction of Si-2OH improved the hydrophobicity,water resistance,thermal stability,tensile strength and adhesion of the WPU film.
[1] Liu Y,Liang H Q,Li S,et al.Preparation of waterborne polyurethane with high solid content and elasticity[J].Journal of Polymer Research,2019,26(6):89-98.
[2] Tonelli C,Ajroldi G.New fluoro-modified thermoplastic polyurethanes[J].Journal of Applied Polymer Science,2010,87(14):2279-2294.
[3] Yong Q W,Liao B,Huang J H,et al.Preparation and characterization of a novel low gloss waterborne polyurethane resin[J].Surface & Coatings Technology,2018,341:78-85.
[4] Li T,Zhang Z P,Rong M Z,et al.Self-healable and thiol-ene UV-curable waterborne polyurethane for anticorrosion coating[J].Journal of Applied Polymer Science,2019,136(26):23-31.
[5] Bahadur A,Saeed A,Shoaib M,et al.Modulating the burst drug release effect of waterborne polyurethane matrix by modifying with polymethylmethacrylate[J].Journal of Applied Polymer Science,2018,136(13):26-39.
[6] Yong Q W,Nian F W,Liao B,et al.Synthesis and characterization of solvent-free waterborne polyurethane dispersion with both sulfonic and carboxylic hydrophilic chain-extending agents for matt coating applications[J].RSC Advances,2015,5(130):107413-107420.
[7] Wang X,Zhang Y,Liang H Y,et al.Synthesis and properties of castor oil-based waterborne polyurethane/sodium alginate composites with tunable properties[J].Carbohydrate Polymers,2018,208:391-397.
[8] Dou Q Z,Wang C C,Cheng C,et al.PDMS-modified polyurethane films with low water contact angle hysteresis[J].Macromolecular Chemistry & Physics,2010,207(23):2170-2179.
[9] Wu Y,Wang H,Wang Y Y,et al.Effect of molecular weight of WPU on the heterogenic PUA composite latex prepared by soap-free emulsion polymerization[J].Russian Journal of Applied Chemistry,2018,91(7):1179-1187.
[10] Cai Z,Liu H,Bi Z,et al.Preparation and performance optimization of two-component waterborne polyurethane locomotive coating[J].Coatings,2019,10(1):4.
[11] Feng Z X,Zheng Y D,Zhao L,et al.An ultrasound-controllable release system based on waterborne polyurethane/chitosan membrane for implantable enhanced anticancer therapy[J].2019,104:109944.
[12] Chen L,Hayashi M,Takasu A.Hydrophobicity enhancement of polyurethanes by attaching fluorinated end blocks via ATRP and correlation between surface properties and self-assembly nature[J].Polymer,2019,172:312-321.
[13] Ni H,Skaja A D,Soucek M D.Acid-catalyzed moisture-curing polyurea/polysiloxane ceramer coatings[J].Progress in Organic Coatings,2000,40(1):175-184.
[14] Cui J C,Xu J C,Li J,et al.A crosslinkable graphene oxide in waterborne polyurethane anticorrosive coatings:experiments and simulation[J].Composites Part B,2020,188:65-74.
[15] Wu Y,Wu J B,Feng Y X.The reinforcing effect of crosslinkable waterborne polyurethane/polysiloxane composite emulsion by aqueous sol-gel method[J].Journal of Coatings Technology and Research,2019,(25):1-11.
[16] Xu C S,Ouyang L,Ren Y,et al.Synthesis and properties of linear polyether-blocked amino silicone-modified cationic waterborne polyurethane[J].International Journal of Polymer Science,2020,(72):1-9.
[17] Monteiro W F,Miranda G M,Soares R R,et al.Weathering resistance of waterborne polyurethane coatings reinforced with silica from rice husk ash[J].Anais da Academia Brasilra de Ciências,2019,91(4):42-59.
[18] Zong J P,Zhang Q S,Sun H F,etal.Characterization of polydimethyl-siloxane polyurethanes synthesized by graft or block copolymerizations[J].Polymer Bulletin,2010,65(5):477-493.
[19] Zhao C,Li Q T,Yan Z,et al.Design and synthesis of novel aminosiloxane crosslinked linseed oil-based waterborne polyurethane composites and its physicochemical properties[J].Progress in Organic Coatings 2019,127:194-201.
[20] Li Q,Guo L H,Qiu T,et al.Synthesis of waterborne polyurethane containing alkoxysilane side groups and the properties of the hybrid coating films[J].Applied Surface Science,2016,377(jul.30):66-74.
PDF
