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euying木蟲 (小有名氣)
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[求助]
求助論文一段摘要中譯英 400字左右
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| 研究了二氧化硅粉末的粒徑和顆粒級(jí)配對(duì)復(fù)合材料性能的影響，特別是對(duì)孔徑分布的影響。選用了四種不同粒徑的二氧化硅粉末，試驗(yàn)結(jié)果表明二氧化硅粉末的粒徑對(duì)復(fù)合材料的玻璃化轉(zhuǎn)變溫度和壓縮性能沒有明顯的影響。復(fù)合材料的吸水率隨著粉末粒徑的增大而出現(xiàn)小幅度的提升。根據(jù)Dinger-Funk模型，挑選了粒徑合適的兩種二氧化硅粉末進(jìn)行顆粒級(jí)配，借助Matlab軟件計(jì)算出了達(dá)到最緊密堆積狀態(tài)時(shí)，兩種二氧化硅粉末的質(zhì)量分?jǐn)?shù)分別為92%和8%。研究了顆粒級(jí)配對(duì)材料壓縮性能、吸水率和孔徑分布的影響，發(fā)現(xiàn)材料壓縮性能基本不受顆粒級(jí)配的影響。隨著二氧化硅粉末SS-1質(zhì)量分?jǐn)?shù)的提高，材料的吸水率呈現(xiàn)降低的趨勢(shì)。材料具有廣泛的介孔分布，孔徑基本全部分布在2～12 nm之間，孔徑分布沒有明顯的規(guī)律。當(dāng)SS-1質(zhì)量分?jǐn)?shù)為92%，顆粒體系處于最緊密堆積狀態(tài)時(shí)，材料的BJH脫附平均孔徑和BET多點(diǎn)比表面積最小，并且與材料吸水率隨著SS-1質(zhì)量分?jǐn)?shù)的變化是一致的，這都驗(yàn)證了顆粒級(jí)配的合理性和適用性。 |
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085600材料與化工
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燦燦妹
至尊木蟲 (著名寫手)
- 翻譯EPI: 68
- 應(yīng)助: 135 (高中生)
- 貴賓: 1.097
- 金幣: 14467.1
- 散金: 3921
- 紅花: 102
- 沙發(fā): 3
- 帖子: 2121
- 在線: 396.8小時(shí)
- 蟲號(hào): 1783324
- 注冊(cè): 2012-04-27
- 性別: GG
- 專業(yè): 環(huán)境工程
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
euying: 金幣+99, 翻譯EPI+1, ★有幫助 2015-04-21 09:31:01
euying: 金幣+99, 翻譯EPI+1, ★有幫助 2015-04-21 09:31:01
| The effects of grain sizes and grain composition of silica powders to the properties of the composite materials were investigated, especially the effects to pore size distribution. In this study, four different size silica powders were selected to test, the experimental results showed that the grain sizes of silica powders had no influence to the glass transition temperature and compression performance of the composite materials. Water absorption of the composite materials promoted slight with the increasing of the grain sizes. Two silica powders with reasonable grain sizes were selected and used for grain composition based on the Dinger-Funk model, then, the mass fraction(92% and 8%, respectively) of the two silica powders in the most closely accumulated state were calculated by using Matlab. The effects of grain composition to compression performance, water absorption and pore size distribution were studied and found that grain composition has no effect on compression performance of the composite materials. The water absorption has a trend of decrease with the increasing of mass fraction of SS-1 silica powde. The materials had widely pore size distributions, which were basically concentrated in 2-12nm and had on obvious correlation. The average pore size of BJH desorption and multipoint BET were the smallest when the mass fraction of SS-1 was 92% and the system was in the most closely accumulated state, which was consistent with the water absorption changeed with the mass fraction of SS-1, and the reasonable and applicable of grain composition were verified simultaneously. |
2樓2015-04-21 08:46:04
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