现代纺织技术2025，Vol.33Issue(7)：48-53,6.DOI:10.12477∕j.att.202410040
涂层负泊松比纱线的制备及性能表征
Preparation and performance characterization of coated yarns with negative Poisson's ratio
摘要
Abstract
Negative Poisson's ratio materials,emerging as a novel class in recent years,exhibit a unique behavior where they expand laterally when stretched and contract laterally when compressed.These materials not only possess geometric deformation characteristics,but also demonstrate excellent shear resistance,indentation resistance,fracture toughness,shock absorption,energy absorption,moisture and air permeability,as well as surface conformability.These unconventional physical properties endow negative Poisson's ratio materials with distinct advantages,leading to their widespread application across various fields,including composites,sensors,and smart wearable devices.Among negative Poisson's ratio materials,negative Poisson's ratio yarns and fabrics constitute a significant category.First of all,negative Poisson's ratio yarns boast strong maneuverability,allowing the yarn to exhibit good negative Poisson's ratio properties through structural modifications.Secondly,these yarns and fabrics have a broad range of applications.By introducing this characteristic into yarns and designing their structure,auxetic effects can be achieved in textile materials. In order to produce negative Poisson's ratio yarns with excellent and stable negative Poisson's ratio characteristics,this study used spandex as the core yarn and polyester filament as the wrapping yarn to prepare the composite yarn on a 16-spindle knitting machine.The wrapping yarn was spirally wrapped around the core yarn,imparting excellent negative Poisson's ratio characteristics to the composite yarn.The 10∶1 ratio of polydi-methylsiloxane(PDMS)rubber solution was used as the coating material.The PDMS solution was dripped onto the yarn and allowed to naturally flow down along the yarn under gravity,ensuring uniform coating.The yarn was then left to stand for 20 minutes to eliminate any bubbles.Finally,the yarn was dried and cured in an oven at 60℃for 30 minutes,resulting in a PDMS-coated negative Poisson's ratio yarn with a significant negative Poisson's ratio effect and structural stability. The article described the preparation of a durable and stable coated negative Poisson's ratio yarn through a one-step coating process,and further investigated the mechanical properties,negative Poisson's ratio performance,stability,and hydrophilic/hydrophobic properties of the yarn before and after coating using comparative analysis.It was found that the CYc1/s2 yarn had a strength of 14.45 N and an elongation of 88.14%,while the CYc4/s2 yarn had a strength of 24.29 N and an elongation of 108.2%.The CYc1/s2 yarn exhibited a maximum negative Poisson's ratio effect of-2.416,which remained stable after 100 cycles of tensile testing.Additionally,the water contact angle of the coated yarn was greater than 100°.Therefore,when the coated yarn is stretched under force,the external wrapped film provides a certain degree of protection,not only increasing the yarn's strength but also its elongation.This results in yarns with excellent and stable negative Poisson's ratio characteristics,providing reference for the preparation of more stable negative Poisson's ratio textiles.关键词
负泊松比纱线/涂层/拉胀效应/疏水/编织Key words
negative Poisson's ratio yarns/coating/auxetic effect/hydrophobicity/braiding分类
轻工纺织引用本文复制引用
武蒙蒙,何光云,余志才,吴美琴,刘赛..涂层负泊松比纱线的制备及性能表征[J].现代纺织技术,2025,33(7):48-53,6.基金项目
浙江理工大学科研启动基金项目(20202090-Y) （20202090-Y）
浙江省教育厅科研项目资助项目(24200109-F) （24200109-F）
