羟基硅油增强反应性聚氨酯涂层的制备及其性能  

Preparation of hydroxyl silicone oil reinforced reactive polyurethane coatings and their properties

作　　者：王淋 张军锋 何方 王卓 黄志超[1,4] 孙福 戚栋明[1,4,5] WANG Lin;ZHANG Junfeng;HE Fang;WANG Zhuo;HUANG Zhichao;SUN Fu;QI Dongming(College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou 310018,China;Hexin Kuraray Microfiber Leather(Jiaxing)Co.,Ltd.,Jiaxing 314000,China;Huanggang Division,Hubei Province Fibre Product Test Center,Huanggang 438021,China;Advanced Textile Technology Innovation Center(Jianhu Laboratory),Shaoxing 312030,China;Zhejiang Provincial Key Laboratory of Green Cleaning Technology and Detergent,Lishui 323000,China)

机构地区：[1]浙江理工大学纺织科学与工程学院(国际丝绸学院),杭州310018 [2]禾欣可乐丽超纤皮(嘉兴)有限公司,浙江嘉兴314000 [3]湖北省纤维检验局黄冈分局,湖北黄冈438021 [4]现代纺织技术创新中心(鉴湖实验室),浙江绍兴312030 [5]浙江省绿色清洁技术及洗涤用品重点实验室,浙江丽水323000

出　　处：《现代纺织技术》2024年第7期108-115,共8页Advanced Textile Technology

基　　金：浙江省科技厅公益项目(LGG22E030011)。

摘　　要：为改善聚氨酯(PU)材料的力学性能,以聚四氢呋喃醚二醇、蓖麻油、双羟基封端聚二甲基硅氧烷(PDMS)为软段,二苯基甲烷二异氰酸酯(MDI)为硬段,采用绿色环保的无溶剂体系制备了有机硅改性的反应性聚氨酯(Si-PU)涂层,考察了PDMS质量分数对PU涂层的拉伸强度、断裂伸长率、高温热稳定性、耐低温性能、手感等的影响。结果表明:与未改性PU涂层相比,Si-PU涂层的拉伸强度、断裂伸长率均得到明显提升。当PDMS质量分数为7.6%时,改性涂层的拉伸强度较未改性PU涂层增长了51.9%;当PDMS质量分数为9.9%时,改性涂层的断裂伸长率较未改性PU涂层增长了99.3%;随着PDMS质量分数提高,质量损失速率最大的温度有一定提高,涂层的玻璃化温度逐渐降低,耐低温性能提高,同时疏水性提高,手感变得更加柔软,综合性能得到显著改善。Polyurethane,as an emerging organic synthetic polymer material,is known as the"fifth largest plastic"and is widely used in chemical,electronics,textile,medicine,construction,automobile,and many other fields because of its excellent performance.Polyurethane is broadly categorized as solvent-based one,water-based one and solvent-free one.Traditionally produced polyurethane is mostly solvent-based one.Solvent-based polyurethane seriously jeopardizes the physical and mental health of producers because of the addition of organic solvents such as N,N dimethylformamide and acetone to the production process,and the presence of residual organic solvents in the finished product may also be harmful to the physical and mental health of consumers.And water-based polyurethane replaces organic solvents with water,solving the problem of solvent pollution.However,because of the existence of hydrophilic groups,the coating's water resistance decreases,which makes it easier to dissolve abd affects the mechanical properties.Meanwhile,the water evaporation is slow,resulting in a long drying time and heavy energy consumption.Solvent-free polyurethane(reactive polyurethanes)solves the above problems of polyurethane by virtue of the absence of solvent incorporation.Mechanical properties are an important index of coatings,and it is necessary for the article to investigate the effect of hydroxyl silicone oil on the mechanical properties of solvent-free polyurethane coatings.Polyurethane coatings with high strength,high-temperature thermal stability,low-temperature resistance,hydrophobicity,and softness were comprehensively designed.Diphenylmethane diisocyanate and 1,3 propylene glycol were used as hard segments,and poly(tetrahydrofuran ether diol),castor oil,and bis-hydroxy-capped polydimethylsiloxane(PDMS)were used as soft segments.The two-component method was used for prepolymerization,followed by mixing,scraping,and reaction molding.A series of solvent-free polyurethane coatings were synthesized by partially replacing castor oil with PD

关 键 词：反应性聚氨酯 涂层 有机硅 无溶剂 微相分离 

分 类 号：TQ334.1[化学工程—橡胶工业]