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疏水改性的聚对二甲苯薄膜对聚氨酯泡沫阻湿性能的影响
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作者 向阳阳 徐应锋 +4 位作者 李谋吉 田春蓉 浦晓峰 于波 周峰 《中国表面工程》 EI CAS CSCD 北大核心 2023年第3期52-64,共13页
硬质聚氨酯泡沫(RPUF)的吸湿特性导致泡沫塑化、溶胀变形,影响其服役安全性及稳定性。但目前针对这种亲水性多孔界面的阻湿研究鲜有报道。通过表面改性的方法引入阻湿层是一种非常有效的解决方法,聚对二甲苯(Parylene C)可在室温沉积条... 硬质聚氨酯泡沫(RPUF)的吸湿特性导致泡沫塑化、溶胀变形,影响其服役安全性及稳定性。但目前针对这种亲水性多孔界面的阻湿研究鲜有报道。通过表面改性的方法引入阻湿层是一种非常有效的解决方法,聚对二甲苯(Parylene C)可在室温沉积条件下形成致密薄膜,具有优异的阻湿性能。在RPUF表面沉积Parylene C薄膜,然后利用全氟小分子组装进行界面疏水改性。通过一维和二维红外、低场核磁、微观形貌和元素组成等表征以及不同厚度镀膜试样吸湿曲线等分析,阐明RPUF的吸湿机理及复合涂层体系阻湿的相关规律。结果表明:当Parylene C镀膜达到一定厚度后,RPUF表面的孔缺陷会被覆盖,其阻湿性能可提高73.6%,同时全氟小分子表面疏水改性后聚氨酯泡沫表面和水分子的相互作用和吸附会被减弱,进一步降低吸湿率。揭示了RPUF吸湿机理和Parylene C薄膜界面阻湿的基本规律,有望用于解决硬质聚氨酯泡沫的长效阻湿问题。 展开更多
关键词 阻湿 聚对二甲苯 聚氨酯泡沫 疏水改性 低场核磁 二维红外
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环氧树脂改性聚异氰脲酸酯泡沫的制备与性能表征
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作者 宋宁宁 贾晓蓉 +2 位作者 韩建军 田春蓉 陈可平 《聚氨酯工业》 CAS 2023年第4期28-30,共3页
以环氧树脂、聚醚多元醇和与多亚甲基多苯基多异氰酸酯(PAPI)为主要原料合成了环氧树脂改性聚异氰脲酸酯泡沫材料(简称改性PIR泡沫),研究了改性PIR泡沫耐热性能和力学性能的影响因素。结果表明,聚醚多元醇用量的增加会降低泡沫材料的玻... 以环氧树脂、聚醚多元醇和与多亚甲基多苯基多异氰酸酯(PAPI)为主要原料合成了环氧树脂改性聚异氰脲酸酯泡沫材料(简称改性PIR泡沫),研究了改性PIR泡沫耐热性能和力学性能的影响因素。结果表明,聚醚多元醇用量的增加会降低泡沫材料的玻璃化转变温度(T_(g)),但可以提高改性PIR泡沫材料的压缩破坏形变,显著改善其韧性。随着固化温度的升高,改性PIR泡沫材料的T_(g)增加,泡沫材料的耐热性能和高温力学性能得到明显改善。密度为200 kg/m^(3)的PIR泡沫在80℃的导热系数不超过0.05 W/(m·K),表现出优良的隔热性能。 展开更多
关键词 聚异氰脲酸酯泡沫 硬质聚氨酯泡沫塑料 环氧树脂 耐热性能
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多巴胺改性氧化石墨烯复合聚脲薄膜的制备及其水汽阻隔性能 被引量:1
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作者 李忠儒 梁书恩 +2 位作者 邓红阳 田春蓉 林晓艳 《西南科技大学学报》 CAS 2022年第1期1-7,共7页
采用多巴胺(DA)对氧化石墨烯(GO)改性制备DA@GO,并将GO和DA@GO分别填充到聚脲(PUA)薄膜中以增强其水汽阻隔性能,研究了GO,DA@GO在PUA中的分散效果及水汽阻隔性能。通过FT-IR,XPS,TEM和SEM等测试对GO,DA@GO的结构、微观形貌及分散性等进... 采用多巴胺(DA)对氧化石墨烯(GO)改性制备DA@GO,并将GO和DA@GO分别填充到聚脲(PUA)薄膜中以增强其水汽阻隔性能,研究了GO,DA@GO在PUA中的分散效果及水汽阻隔性能。通过FT-IR,XPS,TEM和SEM等测试对GO,DA@GO的结构、微观形貌及分散性等进行表征分析,采用水汽透过率(WVTR)测试对GO/PUA和DA@GO/PUA复合薄膜的水汽阻隔性能进行评估。结果表明:DA对GO表面成功改性,GO表面的水接触角为89.3°,DA@GO表面的水接触角下降到76.4°,DA@GO表面极性官能团增多;随着DA@GO含量的增加,复合薄膜的WVTR下降,水汽阻隔性能增强;当DA@GO填充质量分数为1.5%时,DA@GO/PUA薄膜WVTR从44.74 g·m^(-2)·d^(-1)下降到17.41 g·m^(-2)·d^(-1),比纯PUA薄膜降低了61.02%;当GO填充质量分数为3.0%,DA@GO填充质量分数1.5%时,GO/PUA和DA@GO/PUA复合薄膜的WVTR值最低。DA@GO/PUA水汽阻隔性能提升归因于DA@GO在PUA基体内部良好的分散性能和扭曲路径效应。 展开更多
关键词 聚脲 氧化石墨烯 多巴胺 水汽透过率 扭曲路径效应
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China's Oil & Gas Imports and Exports in 2014 被引量:2
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作者 tian chunrong 《China Oil & Gas》 CAS 2015年第1期30-36,共7页
In 2014, China economy transferred from high-speed growth to mid-high speed growth. Oil demand growth weakens caused bad market sales, and new refineries led to more excessive oil refining capacity. As GDP growth rate... In 2014, China economy transferred from high-speed growth to mid-high speed growth. Oil demand growth weakens caused bad market sales, and new refineries led to more excessive oil refining capacity. As GDP growth rate slowed down to 7.4%, oil demand growth rate was slowed down to 4.0% in 2014 from 3.5% in 2013. In 2014, increased net imports of crude oil and LPG counteracted decrease of refined oil and other oil products, so net oil imports rose by more than 16 million tons, up 5.3%. 展开更多
关键词 中国石油 需求增长 石油进口 液化石油气 中国经济 石油产品 同比增长 GDP
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China's Oil and Gas Imports and Exports in 2012
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作者 tian chunrong 《China Oil & Gas》 CAS 2013年第1期36-41,共6页
In 2012, China’s net import of crude was 268.7 million tons, which is 18.63 million tons higher than that of the previous year. Net import of refined products increased greatly as the naphtha import climbed up and ga... In 2012, China’s net import of crude was 268.7 million tons, which is 18.63 million tons higher than that of the previous year. Net import of refined products increased greatly as the naphtha import climbed up and gasoline and diesel import shrank. Net LPG import had been reduced gradually for the third year 展开更多
关键词 进口原油 液化石油气 中国 天然气 出口 相关产品 石脑油 成品油
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China's Oil & Gas Imports and Exports in 2011
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作者 tian chunrong 《China Oil & Gas》 CAS 2012年第1期24-30,41,共8页
Average oil price in international market exceeded 110 US dollars and hit historic high in 2011,but China's crude oil imports still rose to 273.78 million tons.Net imports of crude oil,refined oil,liquefied petrol... Average oil price in international market exceeded 110 US dollars and hit historic high in 2011,but China's crude oil imports still rose to 273.78 million tons.Net imports of crude oil,refined oil,liquefied petroleum gas(LPG)and other oil products created another historic high.Oil dependency,i.e.the proportion of net oil imports to domestic consumption went on rising and rose to about 59.8% in 2011. Net imports of refined oil rose by 46% remarkably, indicating that the growth of processing capacity of domestic refineries lagged behind consumption of oil products. 展开更多
关键词 中国石油 进口原油 产品消费 液化石油气 石油净进口 国际市场 石油产品 加工能力
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China’s Petroleum Imports and Exports in 2010
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作者 tian chunrong 《China Oil & Gas》 CAS 2011年第1期46-52,共7页
Net imports of crude oil, product oil, liquefied petroleum gas (LPG), and other oil products rose by 16.2% and hit a historic high of 253.7 million tons in 2010.Among these, net imports of crude oil reached 236.3 mill... Net imports of crude oil, product oil, liquefied petroleum gas (LPG), and other oil products rose by 16.2% and hit a historic high of 253.7 million tons in 2010.Among these, net imports of crude oil reached 236.3 million tons, 93% of the total, and the growth rate was as high as 19.0% (see Fig.1).As the demand for oil products maintained a robust growth and the scale of oil refineries was expanded further, China's processing quantity of crude oil rose by 50 million tons in 2010, 13.4% higher than the figure in 2009.Sales of oil products were brisk, in particular diesel demand was increased suddenly in the fourth quarter of 2009.Therefore, China's apparent need (production + net imports) of seven kinds of main oil products including gasoline, kerosene, diesel, lubricant oil, fuel oil, LPG and chemical light oil was increased by 11.6% in 2010 (Table 1 and Table 2). 展开更多
关键词 石油进口 出口 中国 石油产品 液化石油气 成品油 LPG 炼油厂
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China's Oil Imports and Exports in 2008
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作者 tian chunrong 《China Oil & Gas》 CAS 2009年第1期36-41,共6页
The net imports of oil,including crude oil,refined oil,LPG and other oil products,increased by 9.5% in 2008 and rose to 200.67 million tons from 183.28 milliontons in 2007(Fig.1,Fig.2).The net imports of crude oil rea... The net imports of oil,including crude oil,refined oil,LPG and other oil products,increased by 9.5% in 2008 and rose to 200.67 million tons from 183.28 milliontons in 2007(Fig.1,Fig.2).The net imports of crude oil reached 175.16 million tons,up by 9.9%. 展开更多
关键词 石油进口 出口 中国 石油产品 进口原油 液化石油气 海关总署 成品油
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Oil Import and Export in China
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作者 tian chunrong 《China Oil & Gas》 CAS 2016年第1期36-42,共7页
Domestic economic growth slowed down and supply exceeded demand in oil market in 2015, so the growth of refineries" processing volume was limited. Nevertheless, the gradual decontrol of market and the storage require... Domestic economic growth slowed down and supply exceeded demand in oil market in 2015, so the growth of refineries" processing volume was limited. Nevertheless, the gradual decontrol of market and the storage requirement under low oil price, crude oil imports hit a record high of 335.5 million tons, with the growth rate approximating 9%. Refined oil exports soared and imports decreased, which made China become a net refined oil exporter for the first time for 24 years, and net imports reached 6.22 million tons. Robust requirement on chemical raw materials propelled imported liquefied petroleum gas market to go on expanding. Imports exceeded 12 ,zillion tons in 2015, thus China leaped into the world's largest liquefied petroleum gas importer. In 2016, oil consumption growth would be kept at lower level. However, China would further decontrol crude oil import and refined oil export permits and put incremental storage capacity, into use. Therefore, crude oil imports would continue to rise up, and refined oil exports may hit a new historic high. hnported liquefied petroleum gas market will enter into a stage of stable growth after two years rapid development. 展开更多
关键词 China Crude oil Refined oil Liquefied petroleum gas IMPORT EXPORT
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Analysis on China’s Petroleum Imports and Exports in 1st Half of 2005
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作者 tian chunrong 《China Oil & Gas》 CAS 2005年第2期48-50,共3页
In the first half of 2005. the import of erude oil increased 4% up of the same period, but the net import of petroleum products including crude oil, oil products, liquefied petroleum gas (LPG) and others declined 7%... In the first half of 2005. the import of erude oil increased 4% up of the same period, but the net import of petroleum products including crude oil, oil products, liquefied petroleum gas (LPG) and others declined 7% of the same period last year. As the oil price in international market continuously climbs up and creates new records, 展开更多
关键词 中国 石油市场 进出口贸易 LPG 市场行情 市场价格
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Analysis of China's Oil Imports and Exports Situation
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作者 tian chunrong 《China Oil & Gas》 CAS 2018年第3期17-24,27,共9页
China's oil import dependence had risen to 72% in 2017, while its net imports of various oil products, including crude oil, refined oil, liquefied petroleum gas (LPG) and other products, had climbed to 418.8 millio... China's oil import dependence had risen to 72% in 2017, while its net imports of various oil products, including crude oil, refined oil, liquefied petroleum gas (LPG) and other products, had climbed to 418.8 million tons, an increase by10.7% over 2016. China's crude oil import reached 420 million tons, surpassed the United States for the first time, and China had become the biggest crude oil importing country in the world. Net export of the rejqned oil, mainly the diesel, continued to increase to 22.7 million tons, as driven by the oversupply situation of the domestic market. Last year, China's LPG import was 18.45 million tons, but its growth was diminishing. Oil price would continue to rise in 2018, while the domestic demand of refined oil would be maintained at a lower rate of growth. However, driving by new refining capacities to be brought online, it is estimated that the crude oil import would still be increased remarkably. LPG import would reach a new high due to the growth potential and strong demand for feedstocks in the petrochemical product market. 展开更多
关键词 Crude oil Refined oil Liquefied petroleum gas (LPG) IMPORT EXPORT
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Analysis of China's Oil Imports and Exports in 2016
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作者 tian chunrong 《China Oil & Gas》 CAS 2017年第1期33-39,共7页
In 2016,China's net imports of crude oil increased to 378.3 million tons and its net exports of product oil soared to 20.45 million tons.Refinery crude runs continue to grow at a low rate,and the domestic product ... In 2016,China's net imports of crude oil increased to 378.3 million tons and its net exports of product oil soared to 20.45 million tons.Refinery crude runs continue to grow at a low rate,and the domestic product oil market still has a supply surplus.Diesel consumption fell for the first time in 21 years.The liquefied petroleum gas(LPG) market continues to grow rapidly,spurred on by feedstock demand for chemicals and gasoline blending components,and imports of LPG have reached a record high of 16.12 million tons.The refinery throughput of Petro China and SINOPEC had declined for 2 consecutive years,but crude oil imports climbed to a new high of 381 million tons as independent refineries boosted their utilization of capacity and the domestic oilfields produced a decreased amount of output.Imported oil now accounts for more than 2/3 of the Chinese market compared to being only about 1/3 15 years ago.Moreover,the proportion of imported crude in refinery runs has risen to 70%.In 2017,China's economy will continue to face substantial pressure,and domestic demand for product oil will continue to grow slowly. 展开更多
关键词 Crude oil Product oil Liquefied petroleum gas IMPORT EXPORT
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China's Oil & Gas Imports and Exports in 2013
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作者 tian chunrong 《China Oil & Gas》 CAS 2014年第1期51-57,59,共8页
Demand for imported oil is weakened by economic growth decline.In 2013,growth of China’s oil imports dropped to the lowest in 8 years,but net imports topped 300 million tons.Domestic oil demand will continue to grow ... Demand for imported oil is weakened by economic growth decline.In 2013,growth of China’s oil imports dropped to the lowest in 8 years,but net imports topped 300 million tons.Domestic oil demand will continue to grow slightly in 2014,and development of alternative fuels will restrict growth of oil import. 展开更多
关键词 中国石油 石油进口 替代燃料 成品油 经济
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Panorama of China's Petroleum Imports and Exports in 2006
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作者 tian chunrong 《China Oil & Gas》 CAS 2007年第1期40-45,共6页
The year of 2006 saw the petroleum imports increase considerably in China since the rapidly developed economy had an urgent demand for fuels. China's economy has been developing at the high rate of more than 10% for ... The year of 2006 saw the petroleum imports increase considerably in China since the rapidly developed economy had an urgent demand for fuels. China's economy has been developing at the high rate of more than 10% for four consecutive years since 2003. The gross domestic product (GDP) rose by 10.7% in China in 2006, which is the highest speed since 1999. China's demand for oil products increased more rapidly in 2006 than in 2005 and its apparent demand for main oil products was 6% higher, which was almost equal to the increment of the processing capacity of domestic oil refining plants. China's import of crude oil has been rising for five consecutive years due to the increased processing and refining capacities. 展开更多
关键词 2006年 中国 石油进口 石油出口 石油生产
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Review of China's Petroleum Imports & Exports in 2005
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作者 tian chunrong 《China Oil & Gas》 CAS 2006年第1期44-48,共5页
After having increased greatly for three consecutive years, the net import of crude oil dropped by 5.2% in 2005 in China. The price inversion between the prices of major product oil in Chinese market with the internat... After having increased greatly for three consecutive years, the net import of crude oil dropped by 5.2% in 2005 in China. The price inversion between the prices of major product oil in Chinese market with the international market leads to a great decrease of imported fuel and diesel oil and an increase of gasoline and diesel exportation. Except crude oil, the net import volumes of oil products including product oil, LPG and other oil products dropped obviously last year. 展开更多
关键词 中国 石油产品 进口贸易 出口贸易 国际市场
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China's Oil Imports and Exports in 2009
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作者 tian chunrong 《China Oil & Gas》 CAS 2010年第1期50-55,共6页
The so-called imported oil dependence degree commonly refers to the proportion of oil imported to China’s oil consumption, which hit 56% in 2009 and has exceeded 50% in 2007. In the past two years,
关键词 石油进口 中国 出口 石油消费
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China's Oil Imports and Exports in 2007
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作者 tian chunrong 《China Oil & Gas》 CAS 2008年第1期38-43,共6页
The net imports of oil increased by 8.4% in China in 2007, hitting the record of 183.48 million tons (Fig.1). The net imports of crude oil and other oil products including paraffin wax, oil coke, and asphalt increased... The net imports of oil increased by 8.4% in China in 2007, hitting the record of 183.48 million tons (Fig.1). The net imports of crude oil and other oil products including paraffin wax, oil coke, and asphalt increased and balanced out the decrease of the net imports of product oil and liquefied petroleum gas (LPG). The net imports of crude oil reached 159.35 million tons, up 14.8%. In 2006, a lot of refining refineries were newly built and expanded, 展开更多
关键词 2007年 中国 石油进口 石油输出
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Imports and Exports in the First Half of 2002
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作者 tian chunrong 《China Oil & Gas》 CAS 2002年第3期49-52,共4页
In the first half of 2002, oil processing volume in China reached 107.1 million tons, 1% more than that in the same period of last year. The imported crude took up 30.8% of the total volume processed, which is about t... In the first half of 2002, oil processing volume in China reached 107.1 million tons, 1% more than that in the same period of last year. The imported crude took up 30.8% of the total volume processed, which is about the same as 30.2% for last year. 展开更多
关键词 Imports and Exports in the First Half of 2002 DOWN LPG
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双联传动轴在某款加油车上的应用
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作者 项冬东 黄森 +2 位作者 王佩 田春荣 郇浪浪 《汽车实用技术》 2017年第10期65-68,71,共5页
商用车传动轴通常采用十字轴万向节伸缩结构,其作用是将动力总成输出不同档位的动力和旋转运动传送到驱动桥主减速器。文章主要采用类比成熟传动轴结构的设计方法进行双联传动轴在某款加油车上的应用。
关键词 类比 双联 传动轴 设计
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仿生介孔二氧化硅用于高效液相色谱拆分手性化合物 被引量:3
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作者 吕云 付仕国 +3 位作者 田春容 袁宝燕 段爱红 袁黎明 《化学通报》 CAS CSCD 北大核心 2019年第2期175-178,共4页
仿生介孔硅是以有机物作为模板,可有效复刻模板的独特形貌,从而得到其相同或相似结构孔径的介孔硅。本文从仿生的观点出发,从蟹壳中提取得到几丁质膜,将其用作模板制备了仿生手性向列型介孔二氧化硅,并用其制备了液相色谱柱,进行了手性... 仿生介孔硅是以有机物作为模板,可有效复刻模板的独特形貌,从而得到其相同或相似结构孔径的介孔硅。本文从仿生的观点出发,从蟹壳中提取得到几丁质膜,将其用作模板制备了仿生手性向列型介孔二氧化硅,并用其制备了液相色谱柱,进行了手性化合物拆分实验。结果表明,该色谱固定相对10个手性化合物有一定的手性分离效果。 展开更多
关键词 仿生介孔二氧化硅 高效液相色谱 手性固定相 手性分离
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