国产日产欧美精品-亚洲国产综合久久精品-色综合色国产热无码一-亚洲欧美日本国产,免费观看一区二区三区_在线观看片A免费不卡观看_亚洲а∨天堂久久精品_99久无码中文字幕一本久道

產(chǎn)品展廳收藏該商鋪

您好 登錄 注冊

當(dāng)前位置:
美國布魯克海文儀器公司>技術(shù)文章>Nanobrook Omni測量應(yīng)用案例-30

技術(shù)文章

Nanobrook Omni測量應(yīng)用案例-30

閱讀:405          發(fā)布時間:2018-6-21
 作者 HanaShiraza,b, Simon J.Peakeb, TimDaveyb, Neil R.Cameronac, Rico F.Tabord

a    Department of Materials Science and Engineering, Monash University, 29 Alliance Lane, Clayton, VIC 3800, Australia

b    Dulux Innovation Centre, 1956 Dandenong Road, Clayton, VIC 3168, Australia

c    School of Engineering, University of Warwick, Coventry CV4 7AL, UK

d    School of Chemistry, Monash University, Clayton, VIC 3800, Australia

 

摘要:

Hypothesis

Film-forming polymer latex particles of diameter <300?nm can be prepared in the complete absence of surfactants, stabilised in part by silica nanoparticles through a Pickering type emulsion polymerisation. Control of the silica wettability through modulation of reaction pH or by reaction of the nanoparticles with a hydrophobic silane results in silica-covered latex particles.

Experiments

The oil-in-water polymerisation process used methyl methacrylate (MMA) and n-butyl acrylate (BA) as co-monomers, potassium persulphate (KPS) as an initiator and a commercially available colloidal nano-silica (Ludox®-TM40). It was found that pH control before polymerisation using methacrylic acid (MAA) facilitated the formation of armoured latexes, and mechanistic features of this process are discussed. An alternative, more robust protocol was developed whereby addition of vinyltriethoxysilane (VTES) to control wettability resulted in latexes compley armoured in colloidal nano-silica. The latexes were characterised using SEM, cryo-TEM and AFM imaging techniques. The mechanism behind the adsorption was investigated through surface pressure and contact angle measurements to understand the factors that influence this irreversible adsorption.

Findings

Results indicate that nanoparticle attachment (but intriguingly not latex size) is dependent on particle wettability, providing new insight into the formation of nanoparticle-armoured latexes, along with opportunities for further development of diversely functionalized inorganic/organic polymer composite particles.

收藏該商鋪

登錄 后再收藏

提示

您的留言已提交成功!我們將在第一時間回復(fù)您~

對比框

產(chǎn)品對比 產(chǎn)品對比 聯(lián)系電話 二維碼 在線交流

掃一掃訪問手機商鋪
010-62081908
在線留言
河北区| 桓台县| 镇沅| 乌兰县| 固原市| 临漳县| 铜鼓县| 兰西县| 杭锦后旗| 昔阳县| 海晏县| 滨海县| 岑巩县| 中西区| 罗定市| 四子王旗| 宾阳县| 玛纳斯县| 郴州市| 雷州市| 呼玛县| 阜宁县| 元阳县| 庐江县| 防城港市| 平阳县| 永嘉县| 台南市| 乐业县| 宁强县| 绥中县| 香河县| 青海省| 东丰县| 新化县| 巴林左旗| 富宁县| 得荣县| 台安县| 托里县| 克拉玛依市|