基于改性桐油成膜材料的包膜尿素的研究

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1、昆明理工大学硕士学位论文基于改性桐油成膜材料的包膜尿素的研究姓名：赵世民申请学位级别：硕士专业：应用化学指导教师：唐辉20040101一一垦!堕三查兰堡主堡窒生堂垒笙苎翌垒!!!!!壁AbstractThestudyanddevelopmentofslow／controlledreleasefertilizershasbecomeoneofthebestapproachestoincreasetheefficiencyoffertilizers，savetheresourcesandcheckenvironmentpollution．However,allkindsofs

2、low／controlledreleasefertilizersintheworldallhavethedisadvantagesofusingalotofpoisonoussolvents，poorbiodegradationofthecoating，badabrasionresistanceandimpactresistancepropertiesandhighcostatpresent．Thesedisadvantageshaveaffectedbadlytheapplicationsofslow／controlledreleasefertilizers．Inthi

3、spaper,thetungoilfromnaturalproductwasusedforthemainoriginalmaterialandwassynthesizedthemodifiedtungoil(MTO)resinwhichhaslargemolecularweightandviscositybychemicalmethod；thecuringoftheMTOresinwasstudiedbyheatormicrowave，andthebestcuringprocessandconditionswerefound；thedissolutionpropertie

4、sofmembraneswereanalyzedindistilledwaterandacetonebySoxhletapparatus；thereactivecoatingartofMTOresinbeingonthefertilizergranulesWaSresearchedintherotarycoatingdrumandthebestcoatingartwasfound；aseriesofthecoatedfertilizerswhichhavedifferentcoatingrateandcoatingstructurewereprepared，thenthe

5、coatedfertilizersweretreatedbythemethodofheatormicrowave；thecoatedureas’releaseproperties，abrasionresistanceandimpactresistancepropertieswereevaluatedbythemethodsofsoakandleaching，andthefactorsaffectingthecoatedureas’releaseproperties，abrasionresistanceandimpactresistanceproperties，forexa

6、mple，coatingart，coatingrate，coatingstructureandfillersetc，werefound；thereleaserulesofseveralkindstypicalofthecoatedureasweresimulatedwithmathematicalformulas，andbaseonthis，thereleasemechanismsofthecoatedUl'easwerediscussedsimply；themicrostructureoftheMTOresinandtheexteriorshapeofthecoated

7、ureaswerestudiedbyFTIRandSEMrespectively．Thefollowingconclusionsweredrawninthispaper．Thecoatingthicknessofthecoatedurea-MTOresinisullifornl，80～150lZⅡ1’andpHofthecoatedureais5．4．TakethesampleF5—6．4(t2)forexample，thecoatingrateis14．3％，ureadissolutionDercentislessthan9