مقاله انگلیسی رایگان در مورد جذب صوتی کارآمد در ساختمان ها – الزویر ۲۰۱۹

elsevier

 

مشخصات مقاله
ترجمه عنوان مقاله روکش های آئروژل سیلیکا و پلی استر برای جذب صوتی کارآمد در ساختمان ها
عنوان انگلیسی مقاله Silica aerogel/polyester blankets for efficient sound absorption in buildings
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۱۴ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله
مقاله پژوهشی (Research Article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) Scopus – Master Journals List – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
۴٫۶۸۶ در سال ۲۰۱۸
شاخص H_index ۱۲۹ در سال ۲۰۱۹
شاخص SJR ۱٫۵۲۲ در سال ۲۰۱۸
شناسه ISSN ۰۹۵۰-۰۶۱۸
شاخص Quartile (چارک) Q1 در سال ۲۰۱۸
مدل مفهومی ندارد
پرسشنامه ندارد
متغیر ندارد
رفرنس دارد
رشته های مرتبط مهندسی عمران، مهندسی پلیمر
گرایش های مرتبط سازه، پلیمریزاسیون
نوع ارائه مقاله
ژورنال
مجله / کنفرانس مصالح ساختمانی و ساخت و ساز – Construction and Building Materials
دانشگاه  Department of Textile Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
کلمات کلیدی مشخصات صوتی، روکش آئروژل سیلیکا، پلی استر بافته نشده، ساختار منفذ، آبگریزی، پرتونگاری مقطعی میکرو محاسبه ای اشعه ایکس
کلمات کلیدی انگلیسی Acoustic characteristics، Silica aerogel blanket، Polyester nonwoven، Pore structure Hydrophobicity، X-ray micro-computed tomography
شناسه دیجیتال – doi
https://doi.org/10.1016/j.conbuildmat.2019.06.031
کد محصول  E12378
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
۱٫ Introduction
۲٫ Background
۳٫ Experimental
۴٫ Results and discussion
۵٫ Conclusion
Declaration of Competing Interest
Acknowledgements
Funding
Appendix A. Supplementary data
References

 

بخشی از متن مقاله:
Abstract

In this paper sound absorption characteristics of silica aerogel/polyester (PET) blankets are investigated. PET fibers were made on an industrial scale compact melt spinning line and then processed on a laboratory scale needling line to produce nonwoven fabrics. The silica aerogel blankets were prepared by in situ synthesis of silica aerogel on the nonwoven fabrics via a two-step sol-gel process of tetraethoxysilane which was followed by drying at ambient pressure. In order to achieve aerogel particles with different pore structure and properties, various synthesis conditions were used. The nonwoven samples were characterized in terms of thickness, fiber diameter, porosity and pore size by X-ray micro-computed tomography and scanning electron microscopy. Moreover, nitrogen adsorption analysis was carried out to determine the specific surface area and pore structure of aerogel particles. The effect of pore structure, physical properties and hydrophobicity of aerogel particles on sound absorption coefficient (SAC) of blankets was investigated using two-microphone transfer function method. Also, the effect of sol volume and nonwoven thickness was investigated. The results indicated that at all frequency levels, silica aerogel/PET blankets enjoy higher SAC than their untreated counterparts. It was found that, SAC is strongly affected by the pore structure of aerogel particles. Silica aerogels with lower bulk densities, larger pore size and higher porosities exhibited better sound absorption performance. The results also indicated that hydrophobic aerogel blankets exhibit higher SAC as compared with hydrophilic blankets. The results also showed that the thickness of nonwoven fabric strongly affects the SAC of aerogel blankets.

Introduction

In recent decade, noise pollution has become the most widespread and least controlled environmental issue. Noise pollution causes or contributes to not only psychological disorders, but also cardiovascular disease, loss of hearing, high blood pressure and tinnitus hearing impairment. Thus technological control of acoustical behavior of industrial products is a fact that has to be scientifically faced by researchers [1]. This control can be achieved using either sound insulating or sound absorbing materials. Conventional various sound absorbers such as foam-like materials or nonwoven fabrics as low-density porous materials can prevent reflection of the incident sound waves and hence increase sound absorption. The use of nonwovens, as widely accepted porous sound absorbing materials, has been extensively researched [2–۶]. Since more than a decade, acoustic engineers have been looking for lightweight sound absorbing materials in buildings. The challenge primarily stemmed from inability of conventional bulky nonwoven fabrics and foams to absorb sound waves, specifically sound waves of low frequency bands that impair speech comprehension [7,8].

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