材料科学
成核
石墨烯
差示扫描量热法
结晶
聚丙烯
氧化物
剥脱关节
化学工程
热稳定性
氢氧化物
聚合物
复合材料
纳米技术
化学
有机化学
工程类
冶金
物理
热力学
作者
Lingtong Li,Xinxin Guo,Shaopeng Chen,Xiaolang Chen,Jun Qin,Zongcheng Lu
出处
期刊:Soft Matter
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:17 (44): 10149-10159
被引量:1
摘要
The co-precipitation method is used to fabricate layered double hydroxide (LDH) nanohybrids with surface engineering of graphene oxide (GO) by radially grafting borate-LDH (BLDH) to BLDH@GO nanosheets, aiming at improving the surface characteristics and compatibility of LDH with the polymer matrix. The results prove the successful fabrication of BLDH@GO and LDH@GO nanosheets. The nanosheets are mixed into polypropylene (PP) by melt blending to study the structure and properties of the composites. The PP composites with BLDH@GO and BLDH have both exfoliation structures and aggregation structures, and the two nanosheets show enhanced interfacial interactions with the PP matrix compared with LDH and LDH@GO. The initial decomposition temperatures of the PP composites are lower than those of the neat PP, but the thermal degradation temperatures of the PP composites are higher. Compared with the other samples, BLDH@GO provides a higher nucleation density, reflected in a smaller spherulite size and a higher crystallization temperature confirmed by the differential scanning calorimetry (DSC) results. BLDH@GO shifts the crystallization temperature of PP to higher values (compared to the neat PP) due to the nucleation effect, which is in line with the increase in the nucleation density detected by polarized optical microscopy (POM).
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