本文選題：包膜肥料　切入點(diǎn)：肥料養(yǎng)分　出處：《合肥工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本研究以聚合物緩／控釋包膜肥料為研究背景,以氮、磷、鉀元素養(yǎng)分透過聚苯乙烯薄膜的透過率為研究對(duì)象。選用來源廣泛、價(jià)格低廉的聚苯乙烯顆粒制備了聚苯乙烯薄膜。并使用Ussing Chamber方法實(shí)驗(yàn)測(cè)定了298K溫度下不同濃度尿素-水溶液、不同組成的尿素-磷酸二氫鈉-水溶液、尿素-氯化鉀-水溶液、尿素-氯化鈉-水溶液和尿素-磷酸二氫鈣-水、尿素-磷酸二氫鈉-水、尿素-氯化鉀-水和飽和水溶液體系中氮元素養(yǎng)分對(duì)于聚苯乙烯薄膜的滲透率數(shù)據(jù),考察了尿素濃度和其他肥料養(yǎng)分添加對(duì)于氮元素滲透率的影響并發(fā)現(xiàn),向尿素溶液中加入其他肥料組分對(duì)氮養(yǎng)分透過聚合物薄膜的滲透率存在重要影響,不可忽視。該影響對(duì)于滲透擴(kuò)散可能是促進(jìn)或抑制的,具體由添加量決定。另外,采用相同方法測(cè)定了不同組成的磷酸二氫鉀-水溶液和尿素-磷酸二氫鉀-水溶液中氮、磷、鉀元素養(yǎng)分對(duì)于聚苯乙烯薄膜的滲透率數(shù)據(jù),考察了不同溶液中的氮、磷、鉀元素養(yǎng)分的透過特性并發(fā)現(xiàn)對(duì)大多數(shù)含尿素的水溶液體系而言,隨著添加肥料養(yǎng)分濃度的提高,肥料養(yǎng)分(氮、磷、鉀)的滲透率呈現(xiàn)出先增大再減小的變化趨勢(shì)。該變化可以由“滲透-擴(kuò)散”理論解釋。在該類體系中,對(duì)于養(yǎng)分滲透率存在兩種相互競(jìng)爭(zhēng)作用：由于濃度增加導(dǎo)致聚合物薄膜中養(yǎng)分溶解度的增加及形成締合物體積的增大。在低濃度下,由于濃度增加導(dǎo)致聚合物薄膜中養(yǎng)分溶解度的增加對(duì)于養(yǎng)分滲透率的影響占主要作用；在高濃度下,由于濃度增加導(dǎo)致形成締合物體積的增大對(duì)于養(yǎng)分滲透率的影響占主要作用。
[Abstract]:In this study, polymer controlled release coated fertilizer as the research background, the nitrogen, phosphorus and potassium nutrient elements through the polystyrene film transmittance as the research object. Using a wide range of sources, low prices of polystyrene particles were prepared using polystyrene film. And the temperature of 298K of different concentrations of urea water solution was determined by Ussing Chamber method the different composition of urea - sodium dihydrogen phosphate aqueous solution, urea and potassium chloride aqueous solution, urea - sodium chloride water solution and water - urea - calcium dihydrogen phosphate, urea - sodium dihydrogen phosphate - water - potassium chloride, urea nitrogen and water saturated aqueous solution system for nutrient permeability data of the polystyrene film, study the concentration of urea and other nutrients added for effect of nitrogen permeability to urea solution and found that adding other fertilizer components of nitrogen nutrients through the polymer film permeability of deposit In the important influence can not be ignored. The effect is to promote or inhibit the diffusion of possible specific decisions by the amount. In addition, using the same method for the determination of the different components of potassium dihydrogen phosphate aqueous solution and urea aqueous solution of potassium dihydrogen phosphate and nitrogen, phosphorus, potassium nutrient for the permeability data of polystyrene films were investigated. Different solutions of nitrogen, phosphorus, potassium nutrient transmittance is found in aqueous solution containing most of urea, with the increase of the concentration of added fertilizer, fertilizer nutrient (nitrogen, phosphorus, potassium) penetration rate increased first and then decreased. The change can be explained by the theory of "osmosis diffusion". In this kind of system, for the existence of two competing effects: due to increasing concentration of nutrient permeability increase and the formation of complex volume nutrient solubility in polymer thin films At low concentration, the increase of nutrient solubility in polymer film plays a major role in nutrient permeability due to the increase of concentration. Under high concentration, the increase of volume of association resulted in the increase of nutrient volume and the impact on nutrient permeability.

【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ444

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 許秀成,李兟萍,王好斌;包裹型緩釋/控制釋放肥料專題報(bào)告 第二報(bào) 世界緩釋/控制釋放肥料生產(chǎn)、消費(fèi)現(xiàn)狀[J];磷肥與復(fù)肥;2000年04期

2 王月祥;;緩/控釋肥料的研究現(xiàn)狀及進(jìn)展[J];化工中間體;2010年03期

，

本文編號(hào)：1558056