{"title":"皮革用水性醋酸纤维素/水性聚氨酯纳米复合乳液涂饰剂的制备和应用","authors":"","doi":"10.1016/j.porgcoat.2024.108707","DOIUrl":null,"url":null,"abstract":"<div><p>To address issues with traditional water-based polyurethane (WPU) leather finishing agents like soft, sticky films, poor water resistance, and slow drying speed, a green, environmentally friendly leather finishing agent was developed using cellulose acetate to modify WPU. Through emulsification of water-based cellulose acetate (WCDA) with WPU emulsion, a nanocomposite emulsion (WCDA/WPU) was created, exhibiting a flexible structure, small particle size, high hardness, rapid drying, water resistance, and strong adhesion the substrate. This agent has a high solid content, excellent mechanical properties, fast drying, and strong binding with leather, overcoming previous limitations. Its properties result from the synergistic advantages of its components, providing a superior alternative to traditional WPU leather finishing agents. The WCDA/WPU nanocomposite emulsion consists of small WPU particles in a large WCDA particle space, with an oil-in-water core-shell structure. At a ratio of 1:3 (WPU:WCDA), the emulsion has a solid content of 56.68 % and a particle size of 195.32 nm. The resulting film has excellent mechanical properties with an elongation at break of 618.45 %, a tensile strength of 9.77 MPa, and a B hardness. The wear rate is 0.983 %, and the drying time is 1.5 times faster than WPU. The film surface is compact and smooth, with a static water contact angle of 94.6°, enhancing hydrophobicity. When applied to leather finishing, the WCDA/WPU nanocomposite emulsion improves air and water permeability by 205.9 % and 40.1 % respectively. Water absorption rates decrease by 19.81 % at 0.25 h and 14.74 % at 24 h, indicating improved resistance to dry and wet friction. In conclusion, leather treated with WCDA/WPU nanocomposite emulsion outperforms traditional methods.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5000,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preparation and application of waterborne cellulose acetate/waterborne polyurethane nanocomposite emulsion finishing agent for leather\",\"authors\":\"\",\"doi\":\"10.1016/j.porgcoat.2024.108707\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To address issues with traditional water-based polyurethane (WPU) leather finishing agents like soft, sticky films, poor water resistance, and slow drying speed, a green, environmentally friendly leather finishing agent was developed using cellulose acetate to modify WPU. Through emulsification of water-based cellulose acetate (WCDA) with WPU emulsion, a nanocomposite emulsion (WCDA/WPU) was created, exhibiting a flexible structure, small particle size, high hardness, rapid drying, water resistance, and strong adhesion the substrate. This agent has a high solid content, excellent mechanical properties, fast drying, and strong binding with leather, overcoming previous limitations. Its properties result from the synergistic advantages of its components, providing a superior alternative to traditional WPU leather finishing agents. The WCDA/WPU nanocomposite emulsion consists of small WPU particles in a large WCDA particle space, with an oil-in-water core-shell structure. At a ratio of 1:3 (WPU:WCDA), the emulsion has a solid content of 56.68 % and a particle size of 195.32 nm. The resulting film has excellent mechanical properties with an elongation at break of 618.45 %, a tensile strength of 9.77 MPa, and a B hardness. The wear rate is 0.983 %, and the drying time is 1.5 times faster than WPU. The film surface is compact and smooth, with a static water contact angle of 94.6°, enhancing hydrophobicity. When applied to leather finishing, the WCDA/WPU nanocomposite emulsion improves air and water permeability by 205.9 % and 40.1 % respectively. Water absorption rates decrease by 19.81 % at 0.25 h and 14.74 % at 24 h, indicating improved resistance to dry and wet friction. In conclusion, leather treated with WCDA/WPU nanocomposite emulsion outperforms traditional methods.</p></div>\",\"PeriodicalId\":20834,\"journal\":{\"name\":\"Progress in Organic Coatings\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.5000,\"publicationDate\":\"2024-08-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Progress in Organic Coatings\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0300944024004995\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Organic Coatings","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0300944024004995","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
Preparation and application of waterborne cellulose acetate/waterborne polyurethane nanocomposite emulsion finishing agent for leather
To address issues with traditional water-based polyurethane (WPU) leather finishing agents like soft, sticky films, poor water resistance, and slow drying speed, a green, environmentally friendly leather finishing agent was developed using cellulose acetate to modify WPU. Through emulsification of water-based cellulose acetate (WCDA) with WPU emulsion, a nanocomposite emulsion (WCDA/WPU) was created, exhibiting a flexible structure, small particle size, high hardness, rapid drying, water resistance, and strong adhesion the substrate. This agent has a high solid content, excellent mechanical properties, fast drying, and strong binding with leather, overcoming previous limitations. Its properties result from the synergistic advantages of its components, providing a superior alternative to traditional WPU leather finishing agents. The WCDA/WPU nanocomposite emulsion consists of small WPU particles in a large WCDA particle space, with an oil-in-water core-shell structure. At a ratio of 1:3 (WPU:WCDA), the emulsion has a solid content of 56.68 % and a particle size of 195.32 nm. The resulting film has excellent mechanical properties with an elongation at break of 618.45 %, a tensile strength of 9.77 MPa, and a B hardness. The wear rate is 0.983 %, and the drying time is 1.5 times faster than WPU. The film surface is compact and smooth, with a static water contact angle of 94.6°, enhancing hydrophobicity. When applied to leather finishing, the WCDA/WPU nanocomposite emulsion improves air and water permeability by 205.9 % and 40.1 % respectively. Water absorption rates decrease by 19.81 % at 0.25 h and 14.74 % at 24 h, indicating improved resistance to dry and wet friction. In conclusion, leather treated with WCDA/WPU nanocomposite emulsion outperforms traditional methods.
期刊介绍:
The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as:
• Chemical, physical and technological properties of organic coatings and related materials
• Problems and methods of preparation, manufacture and application of these materials
• Performance, testing and analysis.