摘要
以相同质量分数(30%)而不同比例的WO_3和Bi_2O_3纳米粒子分别填充至天然橡胶(NR)并制备出各自的复合材料。结果表明,经双子季铵盐(GQA)改性球磨后的WO_3和Bi_2O_3粒子尺寸达到纳米级,并在其表面嫁接上有机活性官能团;与纯NR材料相比,复合材料的拉伸强度均提升2倍以上;当WO_3和Bi_2O_3纳米粒子质量比为15∶15时,复合材料的γ-ray的屏蔽率由各自单独填充时的8.3%和9.2%提高至12%。WO_3和Bi_2O_3纳米粒子量子效应、表面效应以及在NR基体中的均匀分散是协同增强复合材料对γ-ray防护性能及力学性能的关键。
Bi2O3and WO3 nanoparticles were filled into natural rubber（ NR） with total mass fraction of 30% but with different mass ratios,then NR / WO3/ Bi2O3 composites were obtained. Bi2O3and WO3particles size attained to nanoscale,and the surface of particles was successfully grafted with the organic active agent. The tensile strength of composites is more than double natural rubber without nanoparticles of 10. 2 MPa. The composites with the 15∶ 15 mass ratio of Bi2O3and WO3have an outstanding γ-ray shielding property at 241 Am point source of 59. 5 ke V,which is enhanced from 8. 3% of 30∶ 0 and 9. 2% of 0∶ 30 to 12%. Quantum effect and surface effects as well as a good dispersity for the nanoparticles in the NR are the key to synergistically improve γ-ray shielding properties and tensile strength of NR / WO3/ Bi2O3composites.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第12期57-62,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金委员会-中国工程物理研究院联合基金(11176026)
四川省非金属复合与功能材料国家重点实验室开放基金(13zxfk07)
表面物理与化学重点实验室基金(SPCXT201301)
