資源描述：
《pha 在材料中的應(yīng)用》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、TheApplicationandIndustrializationofBio-basedDegradableMaterials--PHAsIntroductionsPolyhydroxyalkanoates(PHA),usingmicroorganismsascarbonsourcesandenergyreserves,isgenerallyfoundintheformsofinclusionbodiesinmicrobialcells.Becauseofthedifferentmonomerstructures,
2、thereisagreatvarietyofPHA,includingnotonlythePHAcomposedofshort-chainmonomersandlong-chainmonomers,butalsothecopolymersformedofdifferentmonomers.ApplicationsBasedontheparticularpolymerproperties,PHAswithdifferentstructuresandcharacteristicshasbeenextensivelystu
3、diedandusedasbio-plastics,fibres,medicalimplantsanddrugreleasecarrier,etc.Atthefirstbeginning,PHAswasdesignedformakingdailysuppliesandpackagingmaterialsbyWellaAGCo.,LtdfromGermany.PHAisdevelopedbyP&G,Biomers,Metabolixandmanyothercompaniesforpackingfilm,whichism
4、ainlyusedinshoppingbags,coatingmaterialofcontainersandpaperaswellasdisposablegoodssuchasrazors,householdutensils,napkins,ladycares,cups,operationclothing,carpets,compostingbags,etc.CollaboratingwithBeijingChemicalTechnologyUniversityandShantouUniversity,GreenBi
5、ohasdevlelopedlotsofsimilarapplicationsofPHA.TheindustrialchainofPHAinfermentation,biomedicalmaterials,pharmaceutics,bio-fuels,fodderandplasticsnowisbeingformed.IndustrializationofPHAsThereisatrendtouseenvironment-friendlynon-petrochemicalplasticbiodegradablepl
6、astic,greenplasticorecologicalplasticbecauseoftheprisingrisingofoilsince1980s.Lotsofcompanies,especiallymanydomesticenterprisesaretryingtoproducevariouskindsofPHAexperimentallyorindustrially.MetabolixintheU.S.A.andGreenBioinTianjinChinawillrespectivelyreachthea
7、nnualproductioncapacityof50,000tonsand10,000tonsfrom2009.TherewillbeenoughPHAmaterialforresearchingbyglobalpolymercompaniesatthattime.ItisexpectedtoappearanewdevelopmentstreamfocusingonPHAapplications.AndtheproductsmadefromPHBVhavebeenonthemarketofEurope.Themas
8、sivesupplyofPHAcanimprovethedevelopmentofitselfasakindofnewstableplastic.TheproductioncostsofPHAwillbecontinuallydecreasing,mainlybecausethesynthesisofPHAiscompletedinaqueou
