Chemical surface modification of precipitated silica nanoparticles using 3-glycidoxypropyltrimethoxysilane by deposition from aqueous alcohol
- سال انتشار: 1388
- محل انتشار: سومین کنفرانس نانوساختارها
- کد COI اختصاصی: CNS03_037
- زبان مقاله: انگلیسی
- تعداد مشاهده: 4128
نویسندگان
Department of Materials Engineering, Isfahan University of Technology
Department of Chemical Engineering, Isfahan University of Technology, Isfahan
Department of Materials Engineering, Isfahan University of Technology
Department of Materials Engineering, Isfahan University of Technology
چکیده
In this research, the amorphous and hydrophilic silica nanoparticles prepared by precipitation method, were surface modified using a silane coupling agent (3-glycidoxypropyltrimethoxysilane, GPTMS). High surface density of OH- groups on the surface of precipitated silica is leading to hydrophilic nature of the particles. It causes agglomerate the nanoparticles and effects on their dispersion in the polymer matrix.Silane treatment with a silane coupling agent such as GPTMS, is leading to replacement of hydroxyl groups with an organofunctional group (glycidox) and changing the surface chemical behavior of silica nanoparticles. The morphology of nanoparticles was evaluated before and after silane treatment using the transmission electron microscope (TEM). Fourier transform infrared spectrophotometer (FTIR) was used to evaluate functional groups and ensure of their attaching on the surface of nanoparticles. Also, dispersivity of nanoparticles through the three organic solvents, before and after modifying, was investigated by light transmittance (LT) method. The results showed that using the calculated theoretical amount of GPTMS for covering a monolayer of organofunctional groups around the nanoparticles, agglomeration effectively broke up and dispersivity of nanoparticles improved in organic solvents.کلیدواژه ها
Silica nanoparticles; silane coupling agent:3-glycidoxypropyltrimethoxysilane:Surface modificationمقالات مرتبط جدید
اطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.