Wang Zhe, Shen Xiaoping, Qian Temeng, Xu Kang, Sun Qingfeng, Jin Chunde
School of Engineering, Zhejiang A&F University, Hangzhou 311300, China.
Zhejiang Academy of Forestry, Hangzhou 310023, China.
Materials (Basel). 2018 Jun 29;11(7):1113. doi: 10.3390/ma11071113.
The hydrophilicity and flammability of fiberboards have limited their real-life applications. In this study, a facile strategy for preparing the multifunctional coatings with superhydrophobicity and flame retardancy on medium density fiberboards (MDFs) has been investigated. The superhydrophobic and flame-retardant coating on the MDF surface was obtained by depositing polydimethylsiloxane (PDMS) and 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane (FDTS)-modified Mg/Al layered double hydroxide (LDH) particles step by step. The as-prepared coating exhibited superhydrophobic properties with a water contact angle (WCA) of ~155° and good self-cleaning properties. Furthermore, the limiting oxygen index (LOI) value of the superhydrophobic MDFs increased by 60.4% as compared to that of the pristine MDFs, showing improved flame retardancy. The peak heat release rate (PHRR) and total heat release (THR) of MDFs decreased after coating with PDMS@FDTS-Mg/Al LDH, suggesting that the superhydrophobic coating decreased the fire growth speed and risk of fire hazard of MDFs. This coating with multiple functions opens a new avenue for the protection and functionalization of MDFs.
纤维板的亲水性和可燃性限制了它们在实际生活中的应用。在本研究中，人们探索了一种在中密度纤维板（MDF）上制备具有超疏水性和阻燃性的多功能涂层的简便策略。通过逐步沉积聚二甲基硅氧烷（PDMS）和1H，1H，2H，2H-全氟癸基三氯硅烷（FDTS）改性的Mg/Al层状双氢氧化物（LDH）颗粒，在MDF表面获得了超疏水和阻燃涂层。所制备的涂层表现出超疏水性能，水接触角（WCA）约为155°，并具有良好的自清洁性能。此外，与原始MDF相比，超疏水MDF的极限氧指数（LOI）值提高了60.4%，显示出改进的阻燃性。用PDMS@FDTS-Mg/Al LDH涂层后，MDF的峰值热释放速率（PHRR）和总热释放（THR）降低，这表明超疏水涂层降低了MDF的火灾增长速度和火灾危险风险。这种具有多种功能的涂层为MDF的保护和功能化开辟了一条新途径。
