阻燃超疏水棉纤维的制备及性能

doi:10.11944/j.issn.1000-0518.2020.03.190225

摘要/Abstract

摘要：

将氢氧化镁(Mg(OH)₂)凝胶沉积到棉纤维上,以提高棉纤维表面粗糙度和阻燃性能,随后将含有Mg(OH)₂的棉纤维浸渍到聚二甲基硅氧烷(PDMS)溶液,获得阻燃超疏水棉织物。并对棉纤维进行了傅里叶变换红外光谱仪(FTIR)、扫描电子显微镜(SEM)、疏水性、热稳定性、阻燃性能和耐久性测试。结果表明,Mg(OH)₂负载到织物上,使得织物表面具有一定的微/纳米结构,形成了粗糙涂层。当Mg(OH)₂浓度为1.0 mol/L时,Mg(OH)₂/PDMS改性的织物接触角(CA)可达158°,极限氧指数(LOI)提升至24.5%,导热系数为0.0525 W/(m·K), 具有超疏水和阻燃性能。整理后织物经过20次洗涤,100次磨擦,极端条件处理后,CA仍大于150°,LOI值高于23%,显示了较好的耐久性。

关键词: 氢氧化镁, 织物涂层, 疏水性, 阻燃, 棉织物

Abstract:

Magnesium hydroxide (Mg(OH)₂) was incorporated into cotton fiber to build surface roughness and improve flame-retardancy of cotton fabric. Subsequently, flame-retardant and superhydrophobic cotton fabric was prepared by further dip-coating of cotton fabric with polydimethylsiloxane (PDMS) solution. Fourier transform infrared spectrometer (FTIR) and scanning electronic microscopy (SEM) analysis confirmed that the pristine cotton fabrics is successfully modified by Mg(OH)₂ and PDMS. The hydrophobicity, thermal stability, flame retardant and durability of the treated cotton fibers were tested. The results indicated that Mg(OH)₂ is loaded on the fabric, which makes the surface of the pristine cotton to have a certain micro-nano structure and forms a rough coating. When the concentration of Mg(OH)₂ was 1.0 mol/L, Mg(OH)₂/PDMS coated fabric had contact angle (CA) of 158°, the limit oxygen index(LOI) of 24.5%, and the thermal conductivity of 0.0305 W/(m·K), suggesting excellent superhydrophobicity and flame-retardant performance. After 20 times of washing, 100 times of friction and under extreme processing conditions for coated fabric, its CA was greater than 150°, its LOI value was higher than 23%, revealing that the coated fabric has an excellent durability.

Key words: magnesium hydroxide, fabric coating, hydrophobicity, flame retardant property, cotton fabric

吉婉丽, 钟少锋, 余雪满. 阻燃超疏水棉纤维的制备及性能[J]. 应用化学, 2020, 37(3): 301-306.

JI Wanli, ZHONG Shaofeng, YU Xueman. Preparation and Properties of Superhydrophobic and Flame-Retardant Cotton Fabric[J]. Chinese Journal of Applied Chemistry, 2020, 37(3): 301-306.

参考文献

[1]	Liu H,Gao S W,Cai J S,et al. Recent Progress in Fabrication and Applications of Superhydrophobic Coating on Cellulose-Based Substrates[J]. Materials,2016,9(3):124-135.
[2]	SHANGGUANG Wenchao,AN Qiufeng,LV Zujun,et al. Synthesis and Application of Transparent Water-Repellent and Wear Resistant Coating[J]. Fine Chem,2018,35(3):377-382(in Chinese). 上官文超,安秋凤,吕竹筠,等. 透明疏水耐磨涂层的制备与应用[J]. 精细化工,2018,35(3):377-382.
[3]	Gu S J,Yang L,Huang W,et al. Fabrication of Hydrophobic Cotton Fabrics Inspired by Polyphenol Chemistry[J]. Cellulose,2017,24(6):2635-2646.
[4]	Dong C H,Lu Z,Zhu P,et al. Combustion Behaviors of Cotton Fabrics Ttreated by a Novel Guanidyl- and Phosphorus-Containing Polysiloxane Flame Retardant[J]. J Therm Aanl Calorim,2015,119(1):349-357.
[5]	Abou-Okeil A,El-Sawy S M,Abdel-Mohdy F A. Flame Retardant Cotton Fabrics Treated with Organophosphorus Polymer[J]. Carbohydr Polym,2013,92(2):2293-2298.
[6]	Norouzi M,Zare Y,Kiany P.Nanoparticles as Effective Flame Retardants for Natural and Synthetic Textile Polymers:Application, Mechanism, and Optimization[J]. Polym Rev,2015,55(3):1-30.
[7]	Alongi J,Carletto R A,Blasio A D,et al. DNA: A Novel, Green, Natural Flame Retardant and Suppressant for Cotton[J]. J Mater Chem A,2013,1:4779-4785.
[8]	Yang Z Y,Wang X W,Lei D P,,et al. A Durable Flame Retardant for Cellulosic Fabrics[J]. Polym Degrad Stabil,2012,97(11):2467 2472.
[9]	Zhao J Q,Zhang X M,Tu R,et al. Mechanically Robust, Flame-Retardant and Anti-bacterial Nanocomposite Films Comprised of Cellulose Nanofibrils and Magnesium Hydroxide Nanoplatelets in a Regenerated Cellulose Matrix[J]. Cellulose,2014,21(3):1859-1872.
[10]	Zhang M,Wang C Y,Wang S L,et al. Fabrication of Superhydrophobic Cotton Textiles for Water Oil Separation Based on Drop-Coating Route[J]. Carbohydr Polym,2013,97(1):59-64.
[11]	Su X J,Li H Q,Lai X J,et al. Vapor-Liquid Sol-Gel Approach to Fabricating Highly Durable and Robust Superhydrophobic Polydimethylsiloxane@Silica Surface on Polyester Textile for Oil-Water Separation[J]. ACS Appl Mater Interfaces,2017,9(33):28089-28099.
[12]	Qing Y Q,Hu C B,Yang C N,et al. Rough Structure of Electrodeposition as a Template for an Ultra-robust Self-cleaning Surface[J]. ACS Appl Mater Interfaces,2017,9(33):16571-16580.
[13]	Si Y F,Guo Z G.Superhydrophobic Nanocoatings:From Materials to Fabrications and to Applications[J]. Nanoscale,2015,7:5922-5946.
[14]	Jason T,Gino P,Uwe E.Recent Advances in Superhydrophobic Electrodeposits[J]. Materials,2016,9(3):151-165.
[15]	Si Y,Guo Z,Liu W.A Robust Epoxy Resins @Stearic Acid-Mg(OH)2 Micro-Nanosheet Super-hydrophobic Omnipotent Protective Coating for Real Life Applications[J]. ACS Appl Mater Interfaces,2016,8(25):16511-16520.
[16]	LIU Xiaoming,YUE Yanjun,ZHOU Yingchun,et al. Preparation of Nano-magnesia by Sol-Gel Method[J]. Liaoning Chem Ind,2005,34(9):380-381(in Chinese). 刘晓明,岳岩君,周迎春,等. 溶胶-凝胶法制备纳米氧化镁[J]. 辽宁化工,2005,34(9):380-381.
[17]	Ponomarev N,Repo E,Srivastava V,et al. Green Thermal-assisted Synthesis and Characterization of Novel Cellulose-Mg(OH)2 Nanocomposite in PEG/NaOH Solvent[J]. Carbohydr Polym,2017,176:327-335.
[18]	Ma H,Chen Z X,Mao Z P .Controlled Growth of Magnesium Hydroxide Crystals and Its Fffect on the High-Temperature Properties of Cotton/Magnesium Hydroxide Composites[J]. Vacuum,2013,95:1-5.