Fu Ye, Zhao Detao, Yao Pengjun, Wang Wencai, Zhang Liqun, Lvov Yuri
§Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana 71270, United States.
ACS Appl Mater Interfaces. 2015 Apr 22;7(15):8156-65. doi: 10.1021/acsami.5b00993. Epub 2015 Apr 8.
A novel aging-resistant styrene-butadiene rubber (SBR) composite is prepared using the antioxidant N-isopropyl-N'-phenyl-p-phenylenediamine (4010NA) loaded inside of halloysite clay nanotubes and used as filler. Loading the antioxidant inside of halloysite allows for its sustained release for nine months in the rubber matrix. By utilizing modified halloysite, the antioxidant concentration in this rubber nanoformulation is tripled without causing "blooming" defects. Furthermore, the halloysite is silanized to enhance its miscibility with rubber. The aging resistance of SBR-halloysite composites is studied by comparing the mechanical properties before and after thermal-oxidative aging. A seven-day test at 90 °C shows preservation of mechanical properties, and no 4010NA blooming is observed, even after one month. Styrene-butadiene rubber with 27 wt % halloysite loaded with 4010NA shows marked increase in aging resistance and promising future of halloysite as a functional rubber filler.
一种新型抗老化丁苯橡胶（SBR）复合材料通过将抗氧化剂N-异丙基-N'-苯基-对苯二胺（4010NA）负载于埃洛石粘土纳米管内部并用作填料来制备。将抗氧化剂负载于埃洛石内部可使其在橡胶基体中持续释放九个月。通过使用改性埃洛石，这种橡胶纳米配方中的抗氧化剂浓度提高了两倍，且未出现“喷霜”缺陷。此外，对埃洛石进行硅烷化处理以增强其与橡胶的相容性。通过比较热氧化老化前后的力学性能来研究SBR-埃洛石复合材料的抗老化性能。在90°C下进行的为期七天的测试表明力学性能得以保留，即使在一个月后也未观察到4010NA喷霜现象。负载有4010NA的27 wt%埃洛石的丁苯橡胶显示出抗老化性能显著提高，且埃洛石作为功能性橡胶填料具有广阔的前景。
