1、 1 2 2 2 2(1. , 150001) (2. , 116012) _ H 2 C H 2 C H 2 C H C OH n m - EVOH , - (EVOH), _ 1, 2, 3 4, 5, 6, 7, 8, 9, 10 11 - EVOH), - EVOH ( 56-71mol% ) 1. / ; 2. DMAc 1. EVOH - 3 EVOH/ / EVOH/ DMAc EVOH/ / EVOH 1 EVOH , , 116012 0411-88993866 - 1 - 0 100 200 300 400 500 600 700 800 0.00 0.05 0.10 0
2、.15 0.20 0.25 Probability Fiber diameter/nm 0 50 100 150 200 250 0. 00 0. 05 0. 10 0. 15 0. 20 0. 25 0. 30 0. 35 0. 40 Probability Fiber diameter/nm 4. 18 20 22 24 26 28 30 32 34 36 100 200 300 400 500 600 700 800 viscosity/mp.s Temperature/ o cDMAC solutionIsopropyl alcohol/water solution 2. 3. / (
3、a) : / :10wt% 15KV C-SD :20cm (b) : / :10wt% 20KV C-SD:20cm (c) : DMAc :10wt% 15KV C-SD:20cm 0 100 200 300 400 500 600 700 800 0.00 0.05 0.10 0.15 0.20 0.25 Probability Fiber diameter/nm 5 4 a b / :10wt% 15 KV 20KV 100-600nm 100-500nm - 2 - 4 c DMAc :10wt% 15KV EVOH/ DMAc 50-120nm EVOH /NaCl/ 12,13
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11、AFM. Macromolecules 2000; 33: 465-469 The Function of Solvent in Electrospinning ZHANG Yujun 1 , LU Chun 2 , LI Jianfeng 2 , CHEN Ping 2 , YU Qi 2(1. Dept. of Applied Chemistry, Harbin Institute of Technology, Harbin 150001) (2.Chemical School, Dalian University of technology, 116012) Abstract Elect
12、rospinning technique has been recognized as an efficient method to manufacture nanofiber. At present, researches focus on the structure and morphology of the fiber, a few investigations have reported the mechanism of electrospinning. In our experiment, the function of solvent was studied, choosing a
13、ppropriate polymer EVOH (Ethylene/vinyl alcohol copolymer) and different solvents. Results indicate that: diameters of fibers electrospun from different solvents were different; nano-fiber can be obtained choosing solvents with small interaction with the polymer. Keywords: electrospinning, EVOH, nano-fiber, viscosity - 4 -
