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《生物合成材料聚β-羟基丁酸(phb)的研究进展（advances in biosynthesis of poly (beta hydroxybutyrate) (phb)）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、生物合成材料聚β-羟基丁酸(phb)的研究进展（Advancesinbiosynthesisofpoly(betahydroxybutyrate)(PHB)）Advancesinbiosynthesisofpoly(betahydroxybutyrate)(PHB)Polybetahydroxybutyricacid(PHB)isaclassofthermoplasticpolyestersthatarestoredinorganismsasenergyandcarbonsourcesintheabsenceofcarbonandnitrogennut
2、rientsintheabsenceofcarbonandnitrogennutrients.Asafullybiodegradablematerial,PHBhasattractedmoreandmoreattention.Inthispaper,theprogressofPHBsynthesismethods,propertiesimprovementanddegradationinhomeandabroadaredescribed,andtheprospectofitsdevelopmentisprospected.Keywords:PHB;bi
3、odegradablematerials;biosynthesis;improvement;degradationWiththedevelopmentofpetrochemicalindustry,chemicalsyntheticplasticsareusedmoreandmorewidely.Assyntheticpolymers,chemicalsyntheticplasticsaredifficulttobedecomposedinnaturalenvironment,resultinginserious"whitepollution"".Th
4、epasttreatmentmethodsofthewasteplasticisburiedandburned,buriedwasteland,incinerationwillproducelargeamountsofcarbondioxideandotherharmfulnitrogen,sulfur,phosphorusandhalogencompounds,contributedtotheformationofthegreenhouseeffectandacidrain.Facingtheincreasinglysevereproblemsofr
5、esourcesandenvironment,itisnecessarytostudyanddevelopnewmaterialsthatcanbedegradednaturallyinthewayofsustainabledevelopment.PHBisatypicalrepresentativeofmicrobialsyntheticdegradationmaterials.Ithasgoodbiodegradability,andallthebiodegradableproductscanbeusedforbiologicalpurposes.
6、Thenatureof1PHBPoly-3-hydroxybutyratePHB,asakindofnaturalpolymer,biocompatible,biodegradable,nonirritating,nonimmunogenicityandtissuecompatibilityandotherspecialproperties,intissueengineering,drugcontrolledreleasesystem,Departmentoforthopedicsandmedicalsurgicalsuturefieldsuccess
7、fullyused.PHBhasgoodbiodegradability,anditsdecompositionproductscanbeusedforbiologicalusewithoutanypollutiontotheenvironment.Themeltingtemperatureis175~180DEGC,anditisakindofthermoplasticwhichcanbecompletelydecomposed.Itsphysicalpropertiesandmolecularstructurearesimilartothoseof
8、polypropylene(PP),suchasmolarmass,softeningpoin
