摘要
将纳米羟基磷灰石(n-HA)和聚乳酸(PLLA)在溶剂中混合,干燥后再采用热压成型工艺制备n-HA/PLLA复合材料。制备过程中n-HA采用F-127和PEG改性处理。拉伸实验发现:n-HA加入PLLA基体中,能提高PLLA的塑性;PEG改性n-HA与PLLA复合力学性能较好,PEG可以改善HA的分散性。扫描电镜图片显示:与PLLA比较,PEG改性n-HA/PLLA复合材料的断裂为韧性断裂,PLLA的断裂接近脆性断裂。
Nano-hydroxyapatite （n-HA） and polyl-lactide （PLLA） were mixed in solvent. Through hot pressing process, dry mixtures were made into n-HA/PLLA composites. During above processes, n-HA were modified by F-127 and PEG. Tensile testing showed that the Plasticity of PLLA was enhanced through add n-HA into PLLA. The mechanical properties of composites of n-HA modified by PEG with PLLA （PEG-n-HA/PLLA） were better. The dispersion of n -HA was improved by PEG. SEM photo showed that the crack of PEG-n-HA/PLLA composites was ductile fracture and that of PLLA was nearly brittle fracture.
出处
《化工新型材料》
CAS
CSCD
北大核心
2007年第10期80-81,共2页
New Chemical Materials
