期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 1, 页码 147-157出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c05936
关键词
Castor oil; Waterborne polyurethane; Biobased internal emulsifier; Pressure sensitive adhesive
资金
- National Key Research and Development Program of China [2019YFD1101202, 2019YFD1101203]
- National Natural Science Foundation [51703068]
- Guangdong Provincial Innovation Team for General Key Technologies in Modern Agricultural Industry [2019KJ133]
- Guangdong Province Science & Technology Program [2018B030306016]
- Program of the Science & Technology Department of Guangzhou, China [201803020039]
- Key Projects of Basic Research and Applied Basic Research of the Higher Education Institutions of Guangdong Province [2018KZDXM014]
- Guangzhou Municipal Key Laboratory of Woody Biomass Functional New Materials [201905010005]
Two novel fully renewable internal emulsifiers were successfully synthesized in this paper, and were used to prepare high biocontent anionic waterborne polyurethane dispersions with excellent storage stability. The biobased pressure sensitive adhesives showed good adhesive properties, which could further expand the applications of these novel vegetable oil-based waterborne PUDs.
In this paper, two novel fully renewable internal emulsifiers have been successfully synthesized from epoxidized soybean oil and natural acids (adipic and pimelic acid) by a solvent-free and self-catalytic method. It is found that the emulsifiers show similar chemical structure and functions with typical petroleum based internal emulsifiers (dimethylol butanoic acid and dimethylol propionic acid), in which the hydroxyl groups act as a cross-linking and the carboxylic acid groups provide the ionic segment. These two novel internal emulsifiers were employed together with castor oil to prepare a series of high biocontent anionic waterborne polyurethane dispersions (PUDs). The unique structure of these two emulsifiers and their good compatibility with castor oil offer PUDs excellent storage stability. Additionally, the biocontent of the polyurethane are high up to 77.7%. Moreover, the adhesive properties of the biobased pressure sensitive adhesives (PSA) were comprehensively investigated by shear resistance, tack, and 180 degrees peel strength test. The PSAs had a shear strength of 1.18 h to more than 100 h, a tack of 1.78-5.66 N, and a peel strength of 1.23-2.77 N/mm, all WPU PSA show good pressure sensitive adhesive properties, which would further expand the application of these novel vegetable oil-based waterborne PUDs.
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