کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
606747 1454539 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Towards a feasible and scalable production of bio-xerogels
ترجمه فارسی عنوان
به سوی تولید و قابل مقیاس تولید زیست زورگل ها
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی

HypothesisThe synthesis process of carbon xerogels is limited, mainly due to two drawbacks that prevent their introduction onto the market: (i) the long time required for producing the material and (ii) the reagents used for the synthesis, which are costly and harmful to the environment. Microwave radiation is expected to produce a reduction in time of more than 90%, while the use of tannin instead of resorcinol will probably result in a cost-effective carbonaceous material.ExperimentsResorcinol–tannin–formaldehyde xerogels containing different amounts of tannin, either with or without a surfactant (sodium dodecyl sulphate), were synthesized by means of two different heating methods: conventional and microwave heating. The effects of the surfactant, the heating method and the addition of tannin upon the porous structure and the chemical composition of the final materials were evaluated.FindingsIt was found that the addition of surfactant is essential for obtaining highly porous xerogels when using tannins. The heating method also plays an important role, as conventionally synthesized samples display a greater volume of large pores. However, tannins are less sensitive to microwave radiation and their use results in tannin–formaldehyde xerogels that have a porous structure and chemical composition similar to those of resorcinol–formaldehyde xerogels.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 456, 15 October 2015, Pages 138–144
نویسندگان
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