Nano-scratch test for POSS films based on vinyltrimethoxysilane and modified with titanium tetrabutoxide  

作　　者：陈平 胡立江 刘金成 崔津津 

机构地区：[1]Chemstry Center, Harbin University of Commerce, Harbin 150076, China [2]Dept. of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China [3]Dept. of Optoelectronic Science and Technology, Harbin Institute of Technology, Harbin 150001, China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2005年第2期124-128,共5页哈尔滨工业大学学报（英文版）

基　　金：SponsoredbytheFoundationoftheDepartmentofScienceandTechnology,andtheDepartmentofEducation,theGovernmentofHeilongjiangProvince(GrantNo.B0208,GBO1A2060,WBO2104and15031063).

摘　　要：Polyhedral oligomeric Silsesquioxanes (POSS) derived from vinyltrimethoxysilane (VMS) and modified with titanium tetrabutoxide (TTBO) (PVT) were prepared by sol-gel process catalyzed by hydrochloric acid (molar ratio: [HCl]/Si=0.05), and heating at 45 ℃ during 3 days. The PVT films (f-PVT) with different TTBO content, 5, 20 and 25wt% TTBO, were prepared by adding the stoichiometric amount of benzoyl peroxide (BPO) to PVT solutions in ethanol, dip-coating over glass substrates, and curing using an appropriate thermal cycle and time. The hardness and elastic modulus of f-PVT were tested by continuous stiffness measurement (CSM) of nanoindentation, and the tribological behaviors were comparatively investigated with a nanoscratch test. The influence of the different TTBO contents on the mechanical properties of f-PVT was discussed. The scratch and friction coefficient profiles of f-PVT were illustrated. As the results of the test, f-PVT with 20% TTBO showed the better scratch resistance and tribological behavior.Polyhedral oligomeric Silsesquioxanes (POSS) derived from vinyltrimethoxysilane (VMS) and modified with titanium tetrabutoxide (TTBO) (PVT) were prepared by sol-gel process catalyzed by hydrochloric acid (molar ratio: [HCl]/Si=0.05), and heating at 45 ℃ during 3 days. The PVT films (f-PVT) with different TTBO content, 5, 20 and 25wt% TTBO, were prepared by adding the stoichiometric amount of benzoyl peroxide (BPO) to PVT solutions in ethanol, dip-coating over glass substrates, and curing using an appropriate thermal cycle and time. The hardness and elastic modulus of f-PVT were tested by continuous stiffness measurement (CSM) of nanoindentation, and the tribological behaviors were comparatively investigated with a nanoscratch test. The influence of the different TTBO contents on the mechanical properties of f-PVT was discussed. The scratch and friction coefficient profiles of f-PVT were illustrated. As the results of the test, f-PVT with 20% TTBO showed the better scratch resistance and tribological behavior.

关 键 词：polyhedral oligomeric silsesquioxanes (POSS) vinyltrimethoxysilanes (VMS) titanium tetrabutoxide (TTBO) sol-gel process NANO-SCRATCH 

分 类 号：O643.12[理学—物理化学]