One-step fabrication of HNBR/MIL-100 composites via selective hydrogenation of acrylonitrile-butadiene rubber with a cat
- PDF / 2,800,418 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 69 Downloads / 151 Views
One-step fabrication of HNBR/MIL-100 composites via selective hydrogenation of acrylonitrile-butadiene rubber with a catalyst derived from MIL-100(Fe) Naiqun Yao1, Yingdong Zhang1, Ruichen Zhang1, Liqun Zhang1,2, and Dongmei Yue1,2,*
1 2
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China Key Laboratory of Beijing City On Preparation and Processing of Novel Polymer Materials, Beijing 100029, China
Received: 19 March 2020
ABSTRACT
Accepted: 30 August 2020
Heterogeneous catalyst has been widely used in hydrogenation process. However, the heterogeneous catalytic hydrogenation of acrylonitrile-butadiene rubber (NBR) usually requires high temperature and thus remains a significant challenge. Herein, an efficient MIL-100(Fe)-supported palladium (Pd) catalyst was successfully synthesized via a solution impregnation method without stabilizing and reducing agents and applied in selective hydrogenation of NBR with an in situ reduction process. Specifically, Pd2? could be directly reduced to Pd0 during hydrogenation process, which would further get involved in the hydrogenation of NBR rapidly. As-obtained Pd(II)/MIL-100(Fe) composite exhibited highly catalytic activity toward NBR at room temperature due to the well-dispersed and small-sized Pd nanoparticles and the high external surface area of MIL-100(Fe). Furthermore, the hydrogenation degree of hydrogenated acrylonitrile-butadiene rubber (HNBR) could reach to 93% even at 10 °C. More importantly, the MIL-100/HNBR composites with improved mechanical properties could be also prepared by the one-step method through using the remained catalysts in HNBR substrate.
Ó
Springer Science+Business
Media, LLC, part of Springer Nature 2020
Introduction Hydrogenation provides an effective and practical route to modify diene-based polymers, which can obtain saturated products with improved mechanical, chemical resistance and thermal properties [1–3]. Handling Editor: Christopher Blanford.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10853-020-05227-9
With the increasing demand for hydrogenated acrylonitrile-butadiene rubber (HNBR), hydrogenation of nitrile-butadiene rubber (NBR) has been of great significance in industries. HNBR is generally prepared by heterogeneous or homogeneous catalysts based on noble metal such as palladium (Pd) [4],
J Mater Sci
rhodium (Rh) [5–7] and ruthenium (Ru) [8]. Heterogeneous catalyst [9–12] with the advantage of easy separation has gained much attention. However, the heterogeneous catalytic hydrogenation of NBR usually requires high temperature and thus developing effective catalysts with high activity at mild reaction temperature remains a significant challenge. The activity of heterogeneous catalysts depends strongly on metal–support interaction, which is closely related to the surface properties of the support. Carbon, SiO2 and TiO2 were used as supports widely for producing Pd-supported catalysts due to the high surface area, which ca
Data Loading...
