Hydrophobic, transparent waterborne polyurethane-polydimethylsiloxane composites prepared from aqueous sol-gel process and applied in corrosion protection

被引:27
作者
Wu, Yan [1 ,2 ]
Guo, Peng [1 ]
Zhao, Yi [1 ]
Liu, Xijing [1 ]
Du, Zongliang [2 ]
机构
[1] Chongqing Jiaotong Univ, Coll Mat Sci & Engn, Chongqing 400074, Chongqing Provi, Peoples R China
[2] Sichuan Univ, Text Inst, Coll Light Ind Text & Food Engn, Chengdu 610065, Sichuan, Peoples R China
关键词
Amino-polydimethylsiloxane emulsion; Sol-gel process; WPU/polydimenthylsiloxane composites; Surface morphology; Intermolecular bonding; Corrosion protection; POLYCARBONATE; SILICA; COATINGS; POLYMERS; SILOXANE;
D O I
10.1016/j.porgcoat.2018.06.002
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
An amino-polydimethylsiloxane emulsion (DN100) was synthesized by aqueous sol-gel reaction. The polyurethane with single end of triethoxysilane (PUS) was also prepared with aminopropyltriethoxysilane (APTES). The DN100 was incorporated into PUS. On the one hand, the urea linkage was formed by reaction of NH2 group of DN100 and NCO group of PUS. On the other hand, the siliceous network was established by the condensation of Si-OH group from DN100 and PUS. The siliceous network was confirmed by Si-29 NMR. The intermolecular bonding of composites included hydrogen bonding and chemical crosslink was investigated at different DN100 content. Simultaneously, AFM results showed that the surface morphology of composites was impacted markedly by intermolecular bonding. Under the low concentration of DN100 content, the biphasic surface with ovaloids formed by strong hydrogen bonding. With an increase in DN100 content, the chemical crosslink play a dominating role in intermolecular bonding. The ordered hydrogen bonding was destroyed by the increasing chemical crosslink, and the ovaloid changed into fold structure on the surface accompanied with reduction in roughness. The water contact angle showed hydrophobic surface of composites. The increase of water contact angle was related to the low surface energy and roughness. The good corrosion protection of composites was verified by the salt spray testing. And the ability of protection was affected by hydrophobic surface and crosslink density.
引用
收藏
页码:231 / 238
页数:8
相关论文
共 23 条
[1]   Water resistance of the membranes for UV curable waterborne polyurethane dispersions [J].
Bai, Chen Yan ;
Zhang, Xing Yuan ;
Dai, Jia Bing ;
Zhang, Chu Yin .
PROGRESS IN ORGANIC COATINGS, 2007, 59 (04) :331-336
[2]   Preparation of polyaniline/graphene composites with excellent anti-corrosion properties and their application in waterborne polyurethane anticorrosive coatings [J].
Cai, Kewen ;
Zuo, Shixiang ;
Luo, Shipin ;
Yao, Chao ;
Liu, Wenjie ;
Ma, Jianfeng ;
Mao, Huihui ;
Li, Zhongyu .
RSC ADVANCES, 2016, 6 (98) :95965-95972
[3]   PDMS-Fluorous Polyoxetane-PDMS Triblock Hybrid Elastomers: Tough and Transparent with Novel Bulk Morphologies [J].
Chakrabarty, Souvik ;
Nisenholt, Mark ;
Wynne, Kenneth J. .
MACROMOLECULES, 2012, 45 (19) :7900-7913
[4]   Structural engineering of polyurethane coatings for high performance applications [J].
Chattopadhyay, D. K. ;
Raju, K. V. S. N. .
PROGRESS IN POLYMER SCIENCE, 2007, 32 (03) :352-418
[5]   Composition, thermal and tensile properties of polyurethane-urea-silica hybrids [J].
Chen, Chiou-Juy ;
Tsai, Mei-Hui ;
Tseng, I-Hsiang ;
Hsu, Ai-Wen ;
Liu, Tung-Chen ;
Huang, Shih-Liang .
RSC ADVANCES, 2013, 3 (25) :9729-9738
[6]   Study on siloxane-modified polyurethane dispersions from various polydimethylsiloxanes [J].
Chen, RS ;
Chang, CJ ;
Chang, YH .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2005, 43 (16) :3482-3490
[7]   Synthesis and characterization of hydroxy-terminated polyether-polydimethylsiloxane-polyether (PE-PDMS-PE) triblock oligomers and their use in the preparation of thermoplastic polyurethanes [J].
Dai, Zeliang ;
Yang, Kai ;
Dong, Qingzhi .
JOURNAL OF APPLIED POLYMER SCIENCE, 2015, 132 (38)
[8]   Study of metal protective hydrophobic coatings from waterborne polyurethane ionomers [J].
Delucchi, M. ;
Trombetta, T. ;
Ricotti, R. ;
Cerisola, G. ;
Turri, S. .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 2009, 39 (11) :2107-2113
[9]   Synthesis and properties of waterborne polyurethane-based PTMG and PDMS as soft segment [J].
Du, Yang ;
Zhang, Jingshu ;
Zhou, Chao .
POLYMER BULLETIN, 2016, 73 (01) :293-308
[10]   Study on waterborne polyurethanes based on poly(dimethyl siloxane) and perfluorinated polyether [J].
Du, Yang ;
Yang, Zhihui ;
Zhou, Chao .
MACROMOLECULAR RESEARCH, 2015, 23 (09) :867-875