不同偶联剂对空心玻璃微球/酚醛复合泡沫塑料界面性能的影响  

Effect of Different Coupling Agents on Interfacial Properties of Hollow Glass Microsphere/Phenolic Syntactic Foams

作　　者：汪波[1] 黄赤[1] 黄志雄[1] 张景洁 

机构地区：[1]武汉理工大学材料科学与工程学院特种功能材料技术教育部重点实验室,武汉430070

出　　处：《材料研究学报》2016年第3期209-219,共11页Chinese Journal of Materials Research

摘　　要：以不同种类的偶联剂对空心玻璃微球表面改性,改性后的微球填充酚醛树脂制备了酚醛复合泡沫塑料。研究了空心微球改性前后的表面性能和酚醛复合泡沫塑料的弯曲强度、断裂韧性以及动态力学性能的变化。结果表明:经过偶联剂处理后的空心微球,降低了空心微球之间的团聚,增加了表面疏水性,改善了与基体间的相容性和界面性能,提高了复合材料的各项性能。不同种类偶联剂中,钛酸酯偶联剂以物理缠结的方式同酚醛基体聚合物链连接,硅氧烷偶联剂除部分与甲阶酚醛中的羟甲基有化学键合作用,大部分仍以物理缠结为主,戊二醛和硅氧烷协同改性通过形成缩醛结构将微球与基体连接起来,因此,在酚醛基复合材料中以戊二醛和硅氧烷偶联剂协同改性的效果最为明显。Hollow glass microspheres（HGM） are modified with different types of coupling agents.Phenolic syntactic foams are prepared by introducing the modified hollow glass microspheres into phenolic matrix. The interaction between HGM and phenolic matrix, as well as the flexural strength, fracture toughness, and dynamic mechanical properties of phenolic syntactic foams were then studied. Results showed that the graft of coupling agent onto the surface of HGM could reduce the agglomeration of HGM in the phenolic matrix, enhance the compatibility of HGM with phenolic matrix and the hydrophobicityof HGM, resulting in a good comprehensive property of phenolic syntactic foams. Among various types of coupling agents of γ-aminopropyltriethoxysilane（APTES）, di（dioctylpyrophosphato） ethylene titanate（NDZ-311）, and glutaraldehyde（GA）, the long chains on the surface of NDZ311 grafted HGM may interact with polymer chains of PF matrix through Vander Waals forces and physical entanglement of molecular chains;For the case of APTES- HGM, when the particles are immersed in resol phenolic, a few hydroxymethylgroup could react with amino group to form chemical bonding, the physicalentanglement of molecular chains dominates the linkage between filler and matrix; In syntactic foams containing GA modified HGM,the aldehyde group could react with phenolic resinmonomers and form acetal linkage with resin matrix.

关 键 词：复合材料 界面性能 表面改性 空心玻璃微球 戊二醛 

分 类 号：TB332[一般工业技术—材料科学与工程]