礦物元素對(duì)絲素-磷酸鈣鹽納米復(fù)合材料生成的影響.pdf

1、浙江理工大學(xué)碩士學(xué)位論文礦物元素對(duì)絲素磷酸鈣鹽納米復(fù)合材料生成的影響姓名：勵(lì)麗申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：姚菊明20061201浙江理工大學(xué)碩士學(xué)位論文AbstractThehumanboneisabiomineralizedtissueregulatedbythecells，whichisconstitutedmainlybytypeIcollagen(around30％)，calciumphosphatecrystals

2、(around70％)，andsmallamountofotherelements，such夠carbonate，sodiummagnesium，potassium，zinc，fluorine，chlorineandsiliconGenerallythenetscaffoldformedbytheorganicpartcontributesthehumanbonewitllllighelasticityandtoughnesswhile

3、theinoBanicpartfortherigidandhardnessInthisstudywestudiedtheeffectofalkalimetalionsandsiliconiononformationofBombyxmorisilkfibroin／calciumphosphatecompositesWestudiedtheeffectofinitialBombyxmorisillfibroinstructureonthep

4、roteinbiomineralizationwherethestructuraltransitionwasinducedbythealkalimetaliontreatmentTheresultsfromXRD，F(xiàn)TIRandSEMshowedthattheaspreparedcompositesformedfromthesilkfibroinwithoutmetaliontreatmenthadthesheetlikemorphol

5、ogywherethepredominantinorganicphasewasdicalciumphosphatedehydrate(DCPD)Incontrast，astructuraltransitionoccurredinthesilkfibroin，fromrandomcoil／helicalstructureto13sheet，afterthetreatmentofdifferentconcentrationsofKandNa

6、metalions(themassratiosofalkaliiontosilkfibroin2：1，2：10，2：100，2：1000)Theas—preparedcompositeshadthefiber／rodlikemorphologywiththepredominantinorganicphaseofhydroxyapatite(HA)，wherethefibers／rodsbundledtogethertoformthena

7、nosize，3DporousnetworkstructureItisthoughtthatthereweremorehydrophilicgroups、Ⅳitlloutsideexposureontheextendedpsheetmolecularchains，whereHAcrystalsgrewwiththeaggregationofsilkfibroinandfumIeraccretedontothesilkfibroinfib

8、rilsthroughtheinteractionwimthehydrophilicgroupsOntheotherhand，thesilkfibroin／calciumphosphatecompositeswerepreparedwithdifferemconcentrationsoftheadditionalsiliconiontoassesstheeffectofsiliconontheHA(hydroxyapatitelform

9、ationinthecompositesFTIRandXRDresultssuggestedthattheinorganicphaseintheaspreparedcompositewereconstitutedmainlybytheamorphousDCPD(dicalciumphosphatedehydrate)whentheconcentrationofsiliconionWaslessthan0009％andthesilkfib