ABSTRACT

Modified nanosize rice husk powder (i.e. mod.nRHP; mod.nRHP-MA-RAFT-H)/ethylene propylene diene monomer (EPDM) nanocomposite was prepared by solvent casting method. The surface of nano rice husk (n-RHP) was treated with maleic anhydride (MA) to yield n-RHP-MA, then, aliphatic hyperbranched polyester (H) was end capped with RAFT agent to obtain H-RAFT. Afterward, H-RAFT-was successfully anchored onto nRHP-MA via RAFT polymerization technique to afford nRHP-MA-RAFT-H (mod.nRHP). The mechanical and thermal properties were studied for nRHP-MA-RAFT-H (mod.nRHP)/EPDM nanocomposite with different loadings of mod.nRHP. The cytotoxicity activities of the prepared mod.nRHP/EPDM nanocomposites were investigated toward human cell lines in vitro.

摘要

通过溶剂流延法制备了改性的纳米稻壳粉（即mod.nRHP； mod.nRHP-MA-RAFT-H）/乙烯丙烯二烯单体（EPDM）纳米复合材料。用马来酸酐（MA）处理纳米稻壳（n-RHP）表面，得到n-RHP-MA，然后用RAFT剂封端脂族超支化聚酯（H），得到H-RAFT。之后，通过RAFT聚合技术成功地将H-RAFT-锚定在nRHP-MA上，得到nRHP-MA-RAFT-H（型号nRHP）。研究了nRHP-MA-RAFT-H（mod.nRHP）/ EPDM纳米复合材料的机械性能和热性能，其中nPHP的加载量不同。研究了制备的mod.nRHP / EPDM纳米复合材料对人细胞系的细胞毒性活性。