有机粘土/聚醚砜/环氧树脂杂化纳米复合材料的制备和性能*

doi:10.11901/1005.3093.2014.221

材料研究学报

2014, Vol. 28

Issue (10): 794-800 DOI: 10.11901/1005.3093.2014.221

本期目录 | 过刊浏览

有机粘土/聚醚砜/环氧树脂杂化纳米复合材料的制备和性能*

马收^1,²(

),郭建春¹

1. 西南石油大学油气藏地质及开发工程国家重点实验室成都 637000
2. 中国石化胜利油田分公司东营 2570822

Preparation and Properties of Organoclay/Polyethersulfone/Epoxy Hybrid Nanocomposites

Shou MA^1,^2,^**(

),Jianchun GUO¹

1. State Key Laboratory of Oil and Gas Geology and Exploitation, Southwest Petroleum University, Chengdu 637000
2. SINOPEC Shengli Oilfield Company, Dongying 257082

引用本文:

马收,郭建春. 有机粘土/聚醚砜/环氧树脂杂化纳米复合材料的制备和性能*[J]. 材料研究学报, 2014, 28(10): 794-800.
Shou MA, Jianchun GUO. Preparation and Properties of Organoclay/Polyethersulfone/Epoxy Hybrid Nanocomposites[J]. Chinese Journal of Materials Research, 2014, 28(10): 794-800.

全文: PDF(5059 KB) HTML

摘要:

分别用溶剂法和熔融法成功制备了有机粘土/聚醚砜/环氧树脂杂化纳米复合材料, 对其拉伸性能、断裂韧性、热性能和微观结构进行了研究。结果表明: 两种杂化纳米复合材料的拉伸强度可达75 MPa以上, 模量可达3.0 GPa以上, 断裂韧性可达1.1 MPam^1/2以上。观察到了聚醚砜和有机粘土对环氧树脂的协同增韧现象。聚醚砜/环氧树脂基体具有半互穿网络结构, 有机粘土片层呈有序剥离形态。用溶剂法制备的杂化纳米复合材料样本的玻璃化转变温度(T_g)在170℃以上, 用熔融法制备的样本的T_g在180℃以上。

关键词 ：复合材料, 杂化纳米复合材料, 聚醚砜, 有机粘土, 断裂韧性, 微观结构

Abstract：

Organoclay/polyethersulphone/epoxy hybrid nanocomposites were prepared by solvent method and melting method, respectively. Their tensile properties, fracture toughness, thermal properties and microstructures were then characterized. Their tensile strength arrived at 75 MPa, modulus reached 2.8GPa, and fracture toughness was over 1.1MPam^1/2. Synergistic toughening effect of the polyethersulphone and organoclay on the epoxy resin was observed. Semi-interpenetrating network of the polyethersulphone/epoxy matrix was found by dynamic mechanical thermal analyzer (DMA) and transmission electron microscope (TEM). The results of X-ray diffractometer (XRD) analysis and TEM observation reveal that the organoclay possessed ordered exfoliated morphologies. Glass transition temperatures (Tgs) of the two hybrid nanocomposites were tested by dynamic mechanical thermal analysis (DMTA). The T_g of the specimen prepared by the solvent method was found higher than 170℃, while that by the melting method was more than 180℃.

Key words： composites hybrid nanocomposite polyethersulphone organoclay fracture toughness microstructure

收稿日期: 2014-04-28

基金资助:* 国家科技重大专项2011ZX05051资助项目。

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https://www.cjmr.org/CN/10.11901/1005.3093.2014.221 或 https://www.cjmr.org/CN/Y2014/V28/I10/794

图1 纯环氧树脂、PES/环氧共混物、纳米复合材料和杂化纳米复合材料的损耗角正切-温度的DMTA曲线

图2 样本断面蚀刻后和蚀刻前的SEM图

表1 四组样本的玻璃化转变温度(Tg)

图3 在不同温度固化的均相结构的PES/环氧共混物和纯环氧的TEM图

图4 原土、有机化粘土、纳米复合材料和杂化纳米复合材料的XRD谱

图5 有机化粘土在杂化纳米复合材料(有机化粘土的质量分数为1%)的TEM图(a), 小的有机化粘土的团聚体(b); 大的有机化粘土团聚体(c, d)

表2 熔融法制备的杂化纳米复合材料的XRD数据

图6 含有1%有机化粘土的杂化纳米复合材料中粘土形态的TEM图

表3 环氧树.脂、PES/环氧共混物、杂化纳米复合材料的拉伸测试结果

表4 固化温度不同的环氧树脂、PES/环氧共混物、纳米复合材料和杂化纳米复合材料的断裂韧性(KIC代表I型断裂韧性的临界值)

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