CIESC Journal ›› 2021, Vol. 72 ›› Issue (11): 5717-5725.DOI: 10.11949/0438-1157.20210820

• Surface and interface engineering • Previous Articles     Next Articles

Preparation and anticorrosion properties of bio-based polybenzoxazine/cellulose nanocrystals superhydrophobic coating

Yuzhu CAO1(),Xin LU1(),Litong WANG1,Manlin YUAN1,Zhong XIN1,2   

  1. 1.Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
    2.State Key Laboratory of Chemical Engineering, East China University of Science and Technology,Shanghai 200237, China
  • Received:2021-06-21 Revised:2021-09-01 Online:2021-11-12 Published:2021-11-05
  • Contact: Xin LU

生物基聚苯并嗪/纤维素纳米晶超疏水防腐蚀涂层的制备及性能

曹玉柱1(),陆馨1(),王立通1,袁满林1,辛忠1,2   

  1. 1.华东理工大学化工学院,上海市多相结构材料化学工程重点实验室,上海 200237
    2.华东理工大学 化学工程联合国家重点实验室,上海 200237
  • 通讯作者: 陆馨
  • 作者简介:曹玉柱(1996—),男,硕士研究生,yuzhu_cao@163.com
  • 基金资助:
    国家自然科学基金项目(21776080);上海市教育委员会科研创新计划项目(2019-01-07-00-02-E00061)

Abstract:

A bio-based benzoxazine monomer was synthesized by using cardanol, stearylamine and paraformaldehyde as raw materials. Differential scanning calorimetry and infrared spectroscopy were employed to investigate the thermal curing behavior of benzoxazine with tannic acid acting as the curing agent. The results show that tannic acid can effectively reduce the ring-opening curing temperature of benzoxazine. The polybenzoxazine primer was prepared on the surface of carbon steel sheet, and then the topcoat was obtained by adding amino-modified cellulose nanocrystalline. The bio-based superhydrophobic coating (PBTC) was constructed with static water contact angle of 161.1°±2.9°. The superhydrophobic coating exhibits good temperature resistance and scratch resistance. Moreover, the electrochemical measurement results indicated that the PBTC coating could still exhibit excellent corrosion resistance after immersion in NaCl aqueous solution for 30 days.

Key words: polybenzoxazine, nanoparticles, superhydrophobic coating, corrosion, composites

摘要:

以腰果酚、十八胺和多聚甲醛为原料合成出生物基苯并嗪单体,以单宁酸为固化剂,采用差示扫描量热分析技术和红外光谱考察了苯并嗪单体的热固化行为,结果表明单宁酸可以有效降低苯并嗪的开环固化温度。在钢片表面首先制备聚苯并嗪涂层作为底漆,再通过在涂层中掺杂氨基修饰纤维素纳米晶制备面漆,构建出静态水接触角为161.1°±2.9°的生物基超疏水防腐蚀涂层(PBTC)。该超疏水涂层表现出良好的耐高低温性能和耐刮擦性。电化学测试结果表明PBTC涂层在NaCl水溶液中浸泡30天后仍然具有良好的防腐蚀性能。

关键词: 聚苯并嗪, 纳米粒子, 超疏水涂层, 腐蚀, 复合材料

CLC Number: