基于正硅酸四乙酯/十八烷基胺的棉织物疏水整理
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摘要
采用BTCA对棉织物进行预处理,以增加织物上活性基团的数量;以正硅酸四乙酯为反应单体、氨水为催化剂、乙醇为溶剂,采用溶胶-凝胶法对前处理后的织物进行粗糙处理;再利用十八烷基胺降低织物表面能量,制备了具有显著疏水效果的棉织物。以静态水接触角、耐喷淋和静水压来表征改性棉织物疏水性能,并用扫描电镜对整理后的棉布形貌进行表征。整理后棉织物的水接触角145°,拒水等级95分,耐静水压力2.56×10~3Pa(25.6 mbar)。
Surface energy and surface roughness are two important factors for hydrophobic materials. Hydrophobic cotton fabric is obtained via tetraethoxysilane and octadecylamine treatment. Cotton fabric is treated with 1,2,3,4-butanetetracarboxyllic acid(BTCA) first to increase the number of active groups on the fabric. Tetraethoxysilane(TEOS) is used as a monomer, ammonia as a catalyst and ethanol as a solvent to obtain silica particles to roughen surface of cotton fibers via sol-gel method. Octadecylamine(OA) is adopted to reduce surface energy of cotton fabric due to its long alkane chain. Static water contact angle, anti-spray and anti-hydrostatic pressure test results are measured to show the hydrophobic properties of the modified cotton fabric. Scanning electron microscopy(SEM) is used to characterize the surface morphology of the modified cotton fabric. Results show that modified cotton fabric can reach a static water contact angle of 145°, a water spray grade of 95, and an anti-hydrostatic pressure of2.56 kPa.
Surface energy and surface roughness are two important factors for hydrophobic materials. Hydrophobic cotton fabric is obtained via tetraethoxysilane and octadecylamine treatment. Cotton fabric is treated with 1,2,3,4-butanetetracarboxyllic acid(BTCA) first to increase the number of active groups on the fabric. Tetraethoxysilane(TEOS) is used as a monomer, ammonia as a catalyst and ethanol as a solvent to obtain silica particles to roughen surface of cotton fibers via sol-gel method. Octadecylamine(OA) is adopted to reduce surface energy of cotton fabric due to its long alkane chain. Static water contact angle, anti-spray and anti-hydrostatic pressure test results are measured to show the hydrophobic properties of the modified cotton fabric. Scanning electron microscopy(SEM) is used to characterize the surface morphology of the modified cotton fabric. Results show that modified cotton fabric can reach a static water contact angle of 145°, a water spray grade of 95, and an anti-hydrostatic pressure of2.56 kPa.
引文
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[11]王世敏,吴崇浩.聚二甲基硅氧烷/SiO2杂化材料的制备与性能研究[J].材料科学与工程学报,2003,21(2):205-207.
[2] LIU Y, XIN J H, CHOI C H. Cotton fabrics with single-faced superhydrophobicity[J]. Langmuir, 2012, 28(50):17426-17434.
[3] ZHANG, Y., CHEN, Y., SHI, L., et al. Recent progress of doublestructural and functional materials with special wettability[J].Journal of Materials Chemistry, 2012, 22(3):799-815.
[4] FENG L, LI S, LI Y, et al. Super-hydrophobic surfaces:from natural to artificial[J]. Advanced materials, 2002, 14(24):1857-1860.
[5]江雷.从自然到仿生的超疏水纳米界面材料[J].现代科学仪器,2003(3):6-10.
[6] ZHU Q, GAO Q, GUO Y, et al. Modified Silica Sol Coatings for Highly Hydrophobic Cotton and Polyester Fabrics Using a OneStep Procedure[J]. Industrial&Engineering Chemistry Research,2011, 50(10):5881-5888.
[7] Abbas R., Khereby M A, Sadik W A, et al. Fabrication of durable and cost effective superhydrophobic cotton textiles via simple one step process[J]. Cellulose, 2015, 22(1):887-896.
[8]徐晓红,王夏琴.丁烷四羧酸对黏胶纤维的交联改性[J].纤维素科学与技术,2008,16(2):6-11.
[9] YIN Y, WANG C. Water-repellent functional coatings through hybrid SiO2/HTEOS/CPTS sol on the surfaces of cellulose fibers[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2013, 417:120-125.
[10]毋伟,贾梦秋,陈建峰,等.硅烷偶联剂对溶胶凝胶法纳米二氧化硅复合材料制备及应用的影响[J].复合材料学报,2004,21(2):70-75.
[11]王世敏,吴崇浩.聚二甲基硅氧烷/SiO2杂化材料的制备与性能研究[J].材料科学与工程学报,2003,21(2):205-207.