Article(id=1319986893069070969, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319986871980118160, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20210624, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1627660800000, receivedDateStr=2021-07-31, revisedDate=1635696000000, revisedDateStr=2021-11-01, acceptedDate=null, acceptedDateStr=null, onlineDate=1792638999477, onlineDateStr=2026-10-22, pubDate=1652976000000, pubDateStr=2022-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792638999477, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792638999477, creator=13701087609, updateTime=1792638999477, updator=13701087609, issue=Issue{id=1319986871980118160, tenantId=1146029695717560320, journalId=1263187385517883426, year='2022', volume='50', issue='5', pageStart='1201', pageEnd='1454', issueExtLink='null', onlineDate='null', pubDate='1652976000000', pubDateStr='2022-05-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1792638994450, creator='13701087609', updateTime=1792639285419, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319988092451275233, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319986871980118160, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319988092451275234, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319986871980118160, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1325, endPage=1334, ext={EN=ArticleExt(id=1319986893278786170, articleId=1319986893069070969, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Preparation of Hydrophobic Silica Aerogel with High Thermal Stability by Argon Atmosphere Heat Treatment, columnId=1263922769897599102, journalTitle=Journal of the Chinese Ceramic Society, columnName=Research Articles, runingTitle=null, highlight=null, articleAbstract=

Improving the thermal stability of silica (SiO2) aerogel plays a crucial role in expanding its heat insulation application. In this work, heat treatment in argon atmosphere was adopted to avoid the thermal oxidative decomposition of hydrophobic groups, which inevitably occurred in the heat treatment in air atmosphere. Also, the physicochemical properties were analyzed. The results show that the hydrophobicity of SiO2 aerogels still maintains at a contact angle of 140° after heat treatment in argon atmosphere at 700 ℃. In the differential scanning calorimetry test in air atmosphere, the peak temperature in exothermic reaction (Tpeak) of heat treated SiO2 aerogels reaches 584 ℃, which is approximately 300 ℃ higher than that of untreated SiO2 aerogels, thus improving the thermal stability. The results obtained also indicate that hydrophobic SiO2 aerogels could be used at high temperatures due to the improved thermal stability and safety.

, authors=Zhi LI1, Yunmeng DENG1, Yang WANG1, Bing DU1, Ming LI1, Qiong LIU1, Xudong CHENG2, authorsList=Zhi LI, Yunmeng DENG, Yang WANG, Bing DU, Ming LI, Qiong LIU, Xudong CHENG, authorCompany=null, correspAuthors=null, authorNote=

LI Zhi (1989-), male, Ph.D., Associate Professor. E-mail:

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提高疏水SiO2气凝胶的热稳定性对拓展其保温隔热应用具有重大意义。为了避免空气氛围下热处理对疏水基团造成的热氧化分解,采用氩气氛围对疏水SiO2气凝胶进行热处理,达到调控其热稳定性的目的。结果表明:经氩气氛围700 ℃热处理后,SiO2气凝胶仍维持着良好疏水性,接触角约140°。在空气氛围下的差式扫描量热测试中,热流峰值达到584 ℃,与未热处理的疏水SiO2气凝胶相比提高约300 ℃,热稳定性显著提高。这为提高疏水SiO2气凝胶的热稳定性和安全性提供了新思路,奠定了疏水SiO2气凝胶高温应用的新基础。

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李治(1989—),博士,副教授。

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氩气热处理制备高热稳定性疏水SiO2气凝胶
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李治 1 , 邓云猛 1 , 王洋 1 , 杜冰 1 , 李明 1 , 刘琼 1 , 程旭东 2
硅酸盐学报 | 研究论文 2022,50(5): 1325-1334
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硅酸盐学报 |研究论文 2022 , 50 (5) : 1325 -1334
氩气热处理制备高热稳定性疏水SiO2气凝胶
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李治1 , 邓云猛1, 王洋1, 杜冰1, 李明1, 刘琼1, 程旭东2
作者信息
  • 1.中南大学资源与安全工程学院,长沙 410083
  • 2.中国科学技术大学,火灾科学国家重点实验室,合肥 230027
作者简介:

李治(1989—),博士,副教授。

Preparation of Hydrophobic Silica Aerogel with High Thermal Stability by Argon Atmosphere Heat Treatment
Zhi LI1 , Yunmeng DENG1, Yang WANG1, Bing DU1, Ming LI1, Qiong LIU1, Xudong CHENG2
Affiliations
  • 1.School of Resource and Safety Engineering, Central South University, Changsha 410083, China
  • 2.University of Science and Technology of China, State Key Laboratory of Fire Science, Hefei 230027, China
  • LI Zhi (1989-), male, Ph.D., Associate Professor. E-mail:

出版时间: 2022-05-20 doi: 10.14062/j.issn.0454-5648.20210624
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提高疏水SiO2气凝胶的热稳定性对拓展其保温隔热应用具有重大意义。为了避免空气氛围下热处理对疏水基团造成的热氧化分解,采用氩气氛围对疏水SiO2气凝胶进行热处理,达到调控其热稳定性的目的。结果表明:经氩气氛围700 ℃热处理后,SiO2气凝胶仍维持着良好疏水性,接触角约140°。在空气氛围下的差式扫描量热测试中,热流峰值达到584 ℃,与未热处理的疏水SiO2气凝胶相比提高约300 ℃,热稳定性显著提高。这为提高疏水SiO2气凝胶的热稳定性和安全性提供了新思路,奠定了疏水SiO2气凝胶高温应用的新基础。

二氧化硅  /  气凝胶  /  热处理  /  热稳定性  /  氩气氛围

Improving the thermal stability of silica (SiO2) aerogel plays a crucial role in expanding its heat insulation application. In this work, heat treatment in argon atmosphere was adopted to avoid the thermal oxidative decomposition of hydrophobic groups, which inevitably occurred in the heat treatment in air atmosphere. Also, the physicochemical properties were analyzed. The results show that the hydrophobicity of SiO2 aerogels still maintains at a contact angle of 140° after heat treatment in argon atmosphere at 700 ℃. In the differential scanning calorimetry test in air atmosphere, the peak temperature in exothermic reaction (Tpeak) of heat treated SiO2 aerogels reaches 584 ℃, which is approximately 300 ℃ higher than that of untreated SiO2 aerogels, thus improving the thermal stability. The results obtained also indicate that hydrophobic SiO2 aerogels could be used at high temperatures due to the improved thermal stability and safety.

silica  /  aerogel  /  heat treatment  /  thermal stability  /  argon atmosphere
李治, 邓云猛, 王洋, 杜冰, 李明, 刘琼, 程旭东. 氩气热处理制备高热稳定性疏水SiO2气凝胶. 硅酸盐学报, 2022 , 50 (5) : 1325 -1334 . DOI: 10.14062/j.issn.0454-5648.20210624
Zhi LI, Yunmeng DENG, Yang WANG, Bing DU, Ming LI, Qiong LIU, Xudong CHENG. Preparation of Hydrophobic Silica Aerogel with High Thermal Stability by Argon Atmosphere Heat Treatment[J]. Journal of the Chinese Ceramic Society, 2022 , 50 (5) : 1325 -1334 . DOI: 10.14062/j.issn.0454-5648.20210624
  • 国家自然科学基金项目(51904336)
  • 安徽省自然科学基金项目(2108085J28)
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doi: 10.14062/j.issn.0454-5648.20210624
  • 接收时间:2021-07-31
  • 首发时间:2026-10-22
  • 出版时间:2022-05-20
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  • 收稿日期:2021-07-31
  • 修回日期:2021-11-01
基金
国家自然科学基金项目(51904336)
安徽省自然科学基金项目(2108085J28)
作者信息
    1.中南大学资源与安全工程学院,长沙 410083
    2.中国科学技术大学,火灾科学国家重点实验室,合肥 230027
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2种不同金属材料的力学参数
科
Family
属数
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genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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