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tao851002銀蟲 (小有名氣)
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[求助]
聚合物電解質(zhì)PVDF/PMMA共混膜的制備
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本人剛開始做聚合物電解質(zhì)膜,參照一篇文獻(xiàn)做聚合物電解質(zhì)PVDF/PMMA共混膜, 但是做出來的膜很脆,我是按文獻(xiàn)中取10mlDMF+1ml甘油,100ml燒杯中磁力攪拌先使兩種溶劑混合均勻,再稱取15wt%(占混合溶劑質(zhì)量比)PVDF+PMMA(兩者質(zhì)量比5:5),加入燒杯中,80度磁力攪拌3h,使聚合物溶解到溶劑中,第一次做時(shí)發(fā)現(xiàn)攪了一個(gè)半小時(shí)后,DMF揮發(fā)了很多,最后溶液變得粘度很大的那種,第二次做時(shí),我在燒杯上用保鮮膜包住了燒杯口,這樣DMF不會(huì)跑掉了,攪了3個(gè)小時(shí)后,在玻璃板上刷膜,然后在真空烘箱中120度下放了24h,但得到的膜很脆,很容易爛掉。溶解聚合物時(shí)的過程不太明白,到底是否這個(gè)過程中溶劑揮發(fā)些,或者是應(yīng)該讓溶劑揮發(fā)些以得到特定粘度的漿液呢? 請(qǐng)高手們指導(dǎo)下,謝謝! 下面是文獻(xiàn)中實(shí)驗(yàn)部分的內(nèi)容: The polymer blend membranes were prepared by the phase-separation method. Poly(vinylidene fluoride) (PVDF,Mw = 534,000, Sigma–Aldrich) and poly(methyl methacrylate)(PMMA, Mw = 350,000, Sigma–Aldrich) were dried for 24 h at 100 ◦C in vacuum. The required amounts of PVDF and PMMA were dissolved in a mixture of N,N-dimethyl formamide (DMF, >99.8%,Sigma–Aldrich) and glycerin (Fluka) (10:1 by volume), and stirred for 3 h at 80 ◦C. Then, the solution was cast onto a glass plate and dried at 120 ◦C for 24 h in vacuum. During this process, DMF and glycerin evaporated in turn, and the voids left by the glycerin formed micropores. The polymer electrolytes were obtained by soaking the obtained membranes in 1 M LiPF6 in a mixture of ethylene carbonate (EC) and dimethyl carbonate (DMC; 1:1 by volume, MERCK, Germany). The compositions of the PVDF/PMMA membranes and the corresponding polymer electrolytes that were prepared are listed in Table 1. M0, M30, M50. M70, M90, and M100 designate the membranes with PVDF to PMMA (wt.%:wt.%) weight ratios of 100:0, 70:30, 50:50, 30:70, 10:90, and 0:100, respectively.The corresponding polymer electrolytes are designated as E0, E30,E50, E70, E90, and E100, respectively. |
電化學(xué) | 凝膠電解質(zhì) | 聚合物電解質(zhì)相關(guān) |

至尊木蟲 (正式寫手)
中級(jí)狗狗

銀蟲 (小有名氣)

至尊木蟲 (正式寫手)
中級(jí)狗狗

銀蟲 (小有名氣)

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