Optimum core-shell ratio in microcapsules containing a reactive solution

  • سال انتشار: 1395
  • محل انتشار: دوازدهمین سمینار بین المللی علوم و تکنولوژی پلیمر
  • کد COI اختصاصی: ISPST12_438
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 358
دانلود فایل این مقاله

نویسندگان

Mohammad BagheriKashani

Iran Polymer and Petrochemical Institute , Tehran- Iran

Ali Salimi

Iran Polymer and Petrochemical Institute , Tehran- Iran

Mohammad Jalal ZohourianMehr

Iran Polymer and Petrochemical Institute , Tehran- Iran

چکیده

The urea-formaldehyde microcapsules containing a peroxide solution were synthesized through oil-in-water emulsion. The optimum core-shell ratio was investigated by optical microscopy and scanning electron microscopy. Optimum core-shell ratio leads to a more efficient releasing and subsequently more healing ability. Five distinct core-shell ratios of 60/40, 70/30, 80/20, 90/10 and 95/5 were synthesized. It was suggested that the core-shell ratio of 90/10 produced the most spherical microcapsules without shell wrinkles. Microcapsules less than the above-mentioned core-shell ratio suffered from a thick layer of porous UF on the surface which results in agglomeration of microcapsules and consequently less stability. The attempt to synthesize microcapsules with core-shell ratio of 95/5 led to very unstable microcapsules with such a thin UF shell that released after filtration. The optimum core-shell content was chosen by optical microscopy and scanning electron microscopy and the core content of 90 percent was confirmed by thermo gravimetric analysis (TGA )

کلیدواژه ها

Microencapsulation- oil-in-water emulsion- reactive solution- core-shell ratio- core content

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.