为降低紫外线对聚丙烯(Polyethylene,PP)非织造土工布的影响,选择ES(Ethylene-Propylene Side By Side)纤维和含有抗老化母粒的PP纤维为原料,TiO2浸轧处理为后整理工序,采用针刺加固和热黏合加固技术制备了具有抗紫外老化功能的PP/ES高强非织造土工布.研究了抗老化工艺对PP/ES 土工布力学性能和抗紫外老化性能的影响.结果表明:添加抗老化母粒和TiO2浸轧后整理的PP/ES 土工布力学性能少许上升;该土工布紫外老化后的羰基吸收峰强度最弱,T5％仅下降4.73 ℃,纵向和横向的断裂强度保留率仅下降26.55％和26.76％,表现出最佳的抗紫外老化性能.
Research on the preparation of PP/ES staple fiber high-strength geo-nonwoven fabric and its anti-ageing performance
The nonwoven geotextile has become the main variety of geotextiles due to its simple process,fast production speed,excellent mechanical properties,low cost and wide application.It has the functions of drainage,filtration,separation,reinforcement and protection,and is widely used in the fields of highway,railway,water conservancy and so on.Polypropylene is an inexpensive and excellent raw material with a wide range of sources,and boasts good acid and alkali resistance.Nonwoven geotextiles prepared from polypropylene can be better used in various types of projects,becoming the hot spot of research in the field of geotextiles in recent years.However,polypropylene tends to deteriorate over a long period of time due to external conditions such as light,temperature and oxygen,which reduces the service life of polypropylene nonwoven geotextiles and greatly restricts their popularisation and application in engineering.To improve the aging of polypropylene nonwoven geotextiles and to expand their application areas,it is necessary to conduct anti-aging treatment.To further improve the aging resistance of nonwoven geotextiles and prolong their service life,this study took ES fibers and PP fibers containing anti-aging masterbatch as raw materials,prepared PP/ES needle-punched nonwoven geotextiles by needle-punching process and PP/ES high-strength nonwoven geotextiles with UV aging resistance by impregnation of TiO2 by post-finishing process,and investigated the effect of the aging-resistance process on the mechanical properties and UV aging resistance of PP/ES geotextiles.The study also investigated the effect of anti-aging process on the mechanical properties,hydrodynamic properties and anti-ultraviolet aging properties of PP/ES geotextiles,and analyzed the effect of adding anti-aging masterbatch and TiO2 on the anti-aging properties of geotextiles by comparing them with pure PP geotextiles.It was found that the aging resistance of PP short-fiber nonwoven geotextiles and PP/ES nonwoven geotextiles was poor,and the fiber breakage and the decrease of thermal stability in the geotextile with the addition of anti-aging masterbatch were effectively alleviated,but the thermal bonding point was still greatly damaged;after the geotextiles were finished by TiO2 impregnation and rolling,a large number of TiO2 particles appeared on the surface of the fiber,and the situation of fiber breakage,decrease of thermal stability and damage of the thermal bonding point was greatly improved;the geotextile with the addition of anti-aging masterbatch and TiO2 finishing suffered the least damage and had the best thermal stability and UV resistance,and its longitudinal and transverse tensile strength was the best.The situation of fiber breakage,reduced thermal stability and destruction of thermal bonding point were greatly improved;while the geotextile with anti-aging masterbatch and TiO2 finishing suffered the least damage,had the best thermal stability and UV resistance,and its longitudinal and transverse tensile strength retention rates decreased by only 26.55％and 26.76％,respectively,and its longitudinal and transverse elongation retention rates decreased by only 27.87％and 26.19％,respectively.
万方数据
维普
