以4,4′-二环己基甲烷二异氰酸酯、端羟丙基硅油、聚己二酸-1,4-丁二醇酯等为主要原料,合成有机硅改性水性聚氨酯(SWPU),并与二硫化钼(MoS2)固体润滑剂共混获得SWPU/MoS2复合材料。采用FT-IR、SEM、摩擦测试仪等对材料结构与性能进行表征。结果表明,合成的SWPU数均分子量在3×104～5×104范围,乳液具有良好的稳定性;SEM观察表明,MoS2在复合材料内部及表面均匀分布。将复合材料涂敷在涤纶织物表面形成复合涂层,有机硅及MoS2的引入导致摩擦系数下降高达57.8%,并一定程度降低了磨损率。
Silicone-modified waterborne polyurethane (SWPU) was synthesized using 4,4′-dicyclohexylmethan diisocyanate,hydroxyl-terminated polydimethylsiloxane,and poly(butylene adipate) diol as the raw materials.The SWPU was further compounded with molybdenum disulfide (MoS2) as a solid lubricant to fabricate SWPU/MoS2 composites.The structure and properties of the composites were characterized by Fourier transform infrared spectroscopy (FT-IR),scanning electron microscopy (SEM),and tribological testing.Results showed that the synthesized SWPU exhibited a number-average molecular weight (Mn) in the range of 3×104 to 5×104,with excellent emulsion stability.SEM analysis confirmed the homogeneous distribution of MoS2 particles both within the composite matrix and on the surface.When applied as a coating on polyester fabric,the SWPU/MoS2 composite coating demonstrated a remarkable reduction in friction coefficient (up to 57.8%) and a moderate decrease in wear rate.
[1] Lang H,Zou K,Chen R,et al.Role of interfacial water in the tribological behavior of graphene in an electric field[J].Nano Letters,2022,22(15):6055-6061.
[2] 乔红斌,郭强.高分子固体润滑耐磨涂层研究进展[J].机械工程材料,2004(2):1-3,23.
[3] 张利,律微波,王绪科,等.固体润滑高分子涂层材料研究进展[J].新技术新工艺,2010(2):53-55.
[4] Sanghvi M R,Tambare O H,More A P.Performance of various fillers in adhesives applications:a review[J].Polymer Bulletin,2022,79(12):10491-10553.
[5] Patti A,Acierno D.Structure-property relationships of waterborne polyurethane (WPU) in aqueous formulations[J].Journal of Vinyl and Additive Technology,2023,29:589-606.
[6] Wang T,Zhao G,Wang Q.Friction and wear behavior of the polyurethane composites modified by bishydroxyl-terminated polydimethylsiloxane[J].Industrial Lubrication and Tribology,2013,65(6):472-479.
[7] Heck C A,Dos Santos J H Z,Wolf C R.Hybrid silicas/waterborne polyurethane composite properties:in situ formation vs.grafting methods[J].Journal of Sol-Gel Science and Technology,2017,81(2):505-513.
[8] 刘茹.二硫化钼的有机改性及其聚合物基复合材料的性能研究[D].青岛:青岛科技大学,2023.
[9] 花文文.纳米二硫化钼的制备修饰及其在复合材料中的应用[D].南京:南京大学,2015.
[10] Lu G,Shuai C,Liu Y,et al.Synergistic effect of single-wall carbon nanotubes and MoS2 on tribological performance of polyether MDI polyurethane elastomer[J].Journal of Mechanical Science and Technology,2022,36(1):179-185.
[11] 全国涂料和颜料标准化技术委员会.GB/T 9286—1998色漆和清漆漆膜的划格试验[S].北京:中国标准出版社,1998.
[12] 全国涂料和颜料标准化技术委员会.GB/T 6739—2006涂膜硬度铅笔测定法[S].北京:中国标准出版社,2006.
[13] 钟彬,李华明,王朝晖,等.丙烯酸/有机硅复合改性水性聚氨酯低表面能涂层的制备及性能研究[J].化工新型材料,2023,51(7):106-110,116.
[14] 王林祥,蔡跃庆.硅油对低表面能有机硅防污涂料性能的影响[J].化工管理,2021(9):56-57.
[15] Tang Y,Yang J,Yin L,et al.Fabrication of superhydrophobic polyurethane/MoS2 nanocomposite coatings with wear-resistance[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2014,459:261-266.
[16] Javaid M,Chauhdary J N,Yasar Javaid M,et al.Channel flow dynamics of fractional viscoelastic nanofluids in molybdenum disulphide grease:a case study[J].Results in Engineering,2024,24:102872.
[17] 郑占模,董从林,袁成清,等.二硫化钼的粒径对聚氨酯复合材料摩擦学性能的影响[J].表面技术,2023,52(8):161-172.
PDF
