教師資料查詢 | 類別: 期刊論文 | 教師: 張朝欽 Chang, Chao-Ching (瀏覽個人網頁)

標題:Preparation of HMDS-modified silica/polyacrylate hydrophobic hard coatings on PMMA substrates
學年105
學期1
出版(發表)日期2016/11/01
作品名稱Preparation of HMDS-modified silica/polyacrylate hydrophobic hard coatings on PMMA substrates
作品名稱(其他語言)
著者Chang, Chao-ching; Wu, Yu-ting; Cheng, Liao-ping
單位
出版者
著錄名稱、卷期、頁數Journal of Coatings Technology and Research 13(6), p.999-1007
摘要Colloidal silica nanoparticles synthesized from tetraethoxysiliane via a sol–gel process were surface modified by 3-(trimethoxysilyl)propyl methacrylate (MSMA) and 1,1,1,3,3,3-hexamethyldisilazane (HMDS). MSMA acted both as a C=C provider and a coupling agent, whereas HMDS was used to prevent particle aggregation and engender hydrophobicity.
The modified silica particles (HMSiO2) were UV-cured together with the crosslinking agent, dipentaerythritol
hexa-acrylate (DPHA) to form coatings on poly(methyl methacrylate) (PMMA) substrates. Dynamic light scattering of the synthesized sols indicated that the average size of HMSiO2 was ca. 10 nm, consistent with that obtained from TEM imaging. FTIR spectroscopic analyses demonstrated chemical attachment of HMDS to the silica particles. The cured
coatings were characterized in terms of water contact
angle, light transmittance, hardness, abrasion resistance, and surface morphology. It was found that
hydrophobicity of the coatings increased while light
transmittance and hardness decreased with increasing
HMDS content. DPHA played the role of providing
mechanical strength and adherence; however, the coatings became lightly hazy when the weight ratio of
DPHA/silica fell in the range 0.3–0.7. In the optimal case, a hard coating (4H) with water contact angle of
108 and transmittance of 100% (vs PMMA) had been obtained at the DPHA content of 10 wt%.
關鍵字Silica nanoparticle;Hard coating;Transparent;Hydrophobicity;Nanocomposite coating
語言英文(美國)
ISSN1547-0091;1935-3804
期刊性質國外
收錄於SCI;TSSCI;EI;
產學合作
通訊作者Cheng, Liao-ping
審稿制度
國別美國
公開徵稿
出版型式,電子版,紙本
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