广东纺织职业技术学院：《纺织材料学》课程教学资源（PPT课件，英文版）7 Micro-fibers and Nanofibers

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Micro-fibers and nano fibers

Micro-fibers and Nano fibers

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Micro fibers 口 Definition ■ Fibers of<1 denier 口 Manufacturing of microfibers ■ Bicomponent fibers 口Is| and in sea 口 Citrus

Micro fibers  Definition ◼ Fibers of < 1 denier  Manufacturing of microfibers ◼ Bicomponent fibers:  Island in sea  Citrus

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology sland in sea d Manufacturing process Suspension of droplets of one component in matrix of the other Two components should have similar melting temperatures Can make composite fiber To obtain the microfiber from the composite fiber, the matrix should be soluble such as polyvinyl alcohol Extremely small fibers possible: <0.1 denier

Island in sea  Manufacturing process ◼ Suspension of droplets of one component in matrix of the other ◼ Two components should have similar melting temperatures ◼ Can make composite fiber ◼ To obtain the microfiber from the composite fiber, the matrix should be soluble such as polyvinyl alcohol ◼ Extremely small fibers possible: < 0.1 denier

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology sland in sea 口App| ication ■ synthetic leather ■ specialty wipes ultra-high filtration materials artificial arteries

Island in sea  Application ◼ synthetic leather ◼ specialty wipes ◼ ultra-high filtration materials ◼ artificial arteries

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Citrus or Segmented pie 日 Manufacturing I Two components: noncompatible but with similar Tm such as PET and nylon 6 Citrus like or hollow citrus PET 米8、 NYLON HOLLOW PIE WEDGE -TIPPED TRIL OBAL SEGMENTED CROSS CONJUGATE

Citrus or Segmented pie  Manufacturing ◼ Two components: noncompatible but with similar Tm such as PET and Nylon 6 ◼ Citrus like or hollow citrus

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Nano fibers D Electrospinning of nano fibers ■ Principle a When electrical force at the surface of a polymer solution or polymer melt overcomes the surface tension a charged jets is ejected. ■ Device Materials ■ Characteristics

Nano fibers  Electrospinning of nano fibers ◼ Principle  When electrical force at the surface of a polymer solution or polymer melt overcomes the surface tension, a charged jets is ejected. ◼ Device ◼ Materials ◼ Characteristics

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Electrospinning device Molymer soluton Capillary tip Fibcr formation △ High voltage Fiser mat Counter electroce Fromhttp://www.uni-marburgde/phys-chemie/wendorffforschung/fi-elektrospInninge.html

Electrospinning Device From: http://www.uni-marburg.de/phys-chemie/Wendorff/Forschung/F1-Elektrospinning_e.html

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Electrospinning Materials 口 polyamides, 口 polylactides, a cellulose derivatives a water soluble polymers such as polyethyleneoxide 日 polymer blends 口 polyme lers containing solid nanoparticles or functional small molecules

Electrospinning Materials  polyamides,  polylactides,  cellulose derivatives,  water soluble polymers such as polyethyleneoxide,  polymer blends  polymers containing solid nanoparticles or functional small molecules

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Nano fibers 0008 PC-SEM Ferrofibers":PA(10‰) Electrospun PVA (10%) and ferromagnetic nanoparticles (3.52%) with SWNT(0. 25%) Electrospun Nomex

Nano Fibers

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Applications 口 Filtration 口 others

Applications  Filtration  Others?