| Properties of Carbon Black/NR Composites by Ultrasonic Wet Mixing |
| Received:September 25, 2019 Revised:September 25, 2019 |
| DOI：10.12136/j.issn.1000-890X.2021.01.0044 |
| Key Words: ultrasonic；carbon black；natural rubber latex；NR；wet mixing；evaporation film forming；gelation film forming；dispersibility |
| Author Name | Affiliation | E-mail | | GONG Tingting* | Qingdao university of science and technology | ttGong1990@163.com | | WU Mingsheng | Qingdao University of Science and Technology | |
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| Abstract: |
| Using the emulsification and homogenization effect of ultrasonic，the carbon black moistened with water and diluted natural rubber latex were mixed uniformly，and then the film[carbon black/natural rubber（NR） composite] was prepared by the evaporation film forming method and gelation forming film method，and the effect of the film forming method and the ultrasonic treatment time and power on properties of the film was explored.The results showed that the film forming time of the evaporation film forming method was too long，the opened carbon black secondary structure re-aggregated，the carbon black in the film was poorly dispersed，and the tensile strength of the film was lower，while the gelation forming film method had higher stability，the carbon black in the film had good dispersibility.When the ultrasonic treatment time was 90 s and the power was 840～960 W，the ultrasonic emulsification and homogenization effect was the best，and the secondary structure of carbon black had a higher degree of opening，meanwhile，the forming speed of the film which was prepared by gelation film forming method was fast，the carbon black was too late to reunite，the dispersibility of the carbon black in the film was good ，there was more bounded rubber in the film，and the tensile strength of the film was higher. |
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