Thông tin chung
  English
  Đề tài NC khoa học
  Bài báo, báo cáo khoa học
  Hướng dẫn Sau đại học
  Sách và giáo trình
  Các học phần và môn giảng dạy
  Giải thưởng khoa học, Phát minh, sáng chế
  Khen thưởng
  Thông tin khác
  Tài liệu tham khảo
  Hiệu chỉnh
 
Số người truy cập: 106,851,063

 Formation, structure and antibacterial activities of silazane networks grafted with poly(ethylene glycol) branches
Tác giả hoặc Nhóm tác giả: François-Xavier Perrin, Nguyen Thi Dieu Hang, Nguyen Dinh Lam
walgreens prints coupons rx coupons printable free printable coupons
abortion stories gone wrong read teenage abortion facts
cvs weekly sale shauneutsey.com prescription savings cards
Nơi đăng: Progress in Organic Coatings
walgreens pharmacy coupon site promo codes walgreens
; Số: Volume 88;Từ->đến trang: 92–105;Năm: 2015
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
walgreens prints coupons rx coupons printable free printable coupons
cvs weekly sale shauneutsey.com prescription savings cards
ABSTRACT
The aim of this investigation was to develop coating materials based on poly(ethylene glycol) (PEG) covalently grafted onto silazane polymers for marine antifouling applications. The optimum conditions for grafting PEG were defined to have a high selectivity toward olefin hydrosilylation. Thick crack-free films were obtained by curing at room temperature of the PEG grafted silazane precursors. The solidification process has been investigated by FTIR spectroscopy, 29Si-NMR in the solid state, thermogravimetric analysis (TGA) as well as elemental analysis. The main reactions that occur during curing are hydrolysis-condensation reactions of alkoxysilane, Si H and Si N functionalities. The PEG-graft-PSZ coatings exhibit excellent repellency against gram-negative Neisseria sp. and gram-positive Clostridium sp. in comparison with the pristine polysilazane surface. The anti-adhesion performance of the coatings depends on the grafting density and the chain length of PEG. The shortest PEG(350 g/mol)-graft-PSZ with the highest graft density was found to have the best anti-adhesion performance. As the density of grafted PEG(750 g/mol) and PEG(2000 g/mol) chains onto the PSZ surface is approximately equal, the relative effectiveness of these two types of PEG is controlled by the length of the PEG chain. The PEG(2000 g/mol)-graft-PSZ coatings are more efficient than the PEG(750 g/mol)-graft-PSZ coatings for the bacterial anti-adhesion.
© Đại học Đà Nẵng
 
 
Địa chỉ: 41 Lê Duẩn Thành phố Đà Nẵng
Điện thoại: (84) 0236 3822 041 ; Email: dhdn@ac.udn.vn