国际生物医学工程杂志
國際生物醫學工程雜誌
국제생물의학공정잡지
INTERNATIONAL JOURNAL OF BIOMEDICAL ENGINEERING
2011年
6期
331-335
,共5页
吴幸%田鸿钧%尹诗衡%陈俭云%李军%王正文%名松林
吳倖%田鴻鈞%尹詩衡%陳儉雲%李軍%王正文%名鬆林
오행%전홍균%윤시형%진검운%리군%왕정문%명송림
硅橡胶%铁质纳米微粒%力学性能%热场发射扫描电镜
硅橡膠%鐵質納米微粒%力學性能%熱場髮射掃描電鏡
규상효%철질납미미립%역학성능%열장발사소묘전경
Silicone rubber%Ferric namoparticles%Mechanical property%Thermal field emission scanning electron microscope
目的 探讨铁质纳米粉体改性甲基乙烯基硅橡胶的力学性能变化及其在基胶中的分散状态.方法 根据国家标准对前期制备出的纳米铁粉增强硅橡胶和碳包铁粉增强硅橡胶复合材料进行邵氏A硬度、拉伸强度、扯断伸长率、扯断永久变形率、撕裂强度等力学性能指标测试,使用热场发射扫描电镜(TFE-SEM)观察复合材料的表面形貌和断口形貌,了解纳米铁在硅橡胶基体的分散状态.结果 复合材料试件的邵氏A硬度、拉伸强度、扯断伸长率、扯断永久变形率、撕裂强度的均值随着铁质纳米粉体添加量的增加而增加.当纳米铁在配方中的份数大于17份、碳包铁的份数大于19份时,复合材料的拉伸强度均值不再增加反而呈下降趋势;当铁质纳米粉体的在配方中超过15份时,扯断伸长率、撕裂强度的均值开始下降.铁质纳米微粒在硅橡胶的表面分散均匀,在配方比为85:15的硅橡胶/纳米铁试样的断面及配方比87:13的硅橡胶/碳包铁试件的断面,可观察到粉体的团聚体.结论 纳米铁粉体和碳包铁粉体对甲基乙烯基硅橡胶力学性能的补强作用主要取决于纳米粉体的粒径、添加量以及在基胶中的团聚程度.
目的 探討鐵質納米粉體改性甲基乙烯基硅橡膠的力學性能變化及其在基膠中的分散狀態.方法 根據國傢標準對前期製備齣的納米鐵粉增彊硅橡膠和碳包鐵粉增彊硅橡膠複閤材料進行邵氏A硬度、拉伸彊度、扯斷伸長率、扯斷永久變形率、撕裂彊度等力學性能指標測試,使用熱場髮射掃描電鏡(TFE-SEM)觀察複閤材料的錶麵形貌和斷口形貌,瞭解納米鐵在硅橡膠基體的分散狀態.結果 複閤材料試件的邵氏A硬度、拉伸彊度、扯斷伸長率、扯斷永久變形率、撕裂彊度的均值隨著鐵質納米粉體添加量的增加而增加.噹納米鐵在配方中的份數大于17份、碳包鐵的份數大于19份時,複閤材料的拉伸彊度均值不再增加反而呈下降趨勢;噹鐵質納米粉體的在配方中超過15份時,扯斷伸長率、撕裂彊度的均值開始下降.鐵質納米微粒在硅橡膠的錶麵分散均勻,在配方比為85:15的硅橡膠/納米鐵試樣的斷麵及配方比87:13的硅橡膠/碳包鐵試件的斷麵,可觀察到粉體的糰聚體.結論 納米鐵粉體和碳包鐵粉體對甲基乙烯基硅橡膠力學性能的補彊作用主要取決于納米粉體的粒徑、添加量以及在基膠中的糰聚程度.
목적 탐토철질납미분체개성갑기을희기규상효적역학성능변화급기재기효중적분산상태.방법 근거국가표준대전기제비출적납미철분증강규상효화탄포철분증강규상효복합재료진행소씨A경도、랍신강도、차단신장솔、차단영구변형솔、시렬강도등역학성능지표측시,사용열장발사소묘전경(TFE-SEM)관찰복합재료적표면형모화단구형모,료해납미철재규상효기체적분산상태.결과 복합재료시건적소씨A경도、랍신강도、차단신장솔、차단영구변형솔、시렬강도적균치수착철질납미분체첨가량적증가이증가.당납미철재배방중적빈수대우17빈、탄포철적빈수대우19빈시,복합재료적랍신강도균치불재증가반이정하강추세;당철질납미분체적재배방중초과15빈시,차단신장솔、시렬강도적균치개시하강.철질납미미립재규상효적표면분산균균,재배방비위85:15적규상효/납미철시양적단면급배방비87:13적규상효/탄포철시건적단면,가관찰도분체적단취체.결론 납미철분체화탄포철분체대갑기을희기규상효역학성능적보강작용주요취결우납미분체적립경、첨가량이급재기효중적단취정도.
Objective To explore mechanical property changes of methyl vinyl silicone rubber modified by ferric nanoparticles and its dispersed phase.Methods Mechanical properties such as Shore A hardness,tensile strength,elongation at break,tearing rate of permanent deformation and tearing strength of pre-prepared ironic nanoparticle enhanced silicone rubber and carbon-coated ferric particle reinforced silicone rubber were tested according to national standards.A thermal field emission scanning electron microscope (TFE-SEM) was used to investigate the morphology of both surface and fracture of the composite materials and to observe the dispersion of ferric nanoparticles in them.Results Mean values of Shore A hardness,tensile strength,elongation at break,tearing permanent deformation rate and tear strength of modified composites increased with the increasing amounts of ferric nanoparticles,however,when the quota of ironic nanoparticles in the composite formula were greater than 17 phr,carbon-coated ferric nanoparticles more than 19 phr,the mean values of tensile strength of two composites stopped increasing and presented the declining trend.When the quota of ferric nanoparticles in the formula exceeding 15 phr,the mean values of elongation at break and tear strength began to decrease in the formula ratio of silicone rubber/ferric nanoparticles up to 85:15,while the Shore A hardness of samples increased all the way.Ferric nanoparticles dispersed evenly on the surface of composites.Nanopowder aggregation in the fracture surface of both composites could be observed at the formula ratio of 85:15 of silicone rubber/iron nanoparticle and 87:13 of silicone rubber/carbon-coated iron specimen.Conclusion Effect of iron nanapareticles and carbon-coated ferric nanoparticles on the mechanical properties of the reinforced methyl vinyl silicone rubber depends on the nanoparticle size,additive amount and agglomeration.