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1、浙江農(nóng)林大學學報,2012,29(5):671—679JournalofZhejiangA&FUniversity壓縮炭化楊木的微觀結構與化學成分陳琛-,鄧玉和,徐了,周宇,陳雯,吳晶,王向歌,楊瑩(1.南京林業(yè)大學木材工業(yè)學院,江蘇南京210037;2.浙江升華云峰新材股份有限公司,浙江湖州313200;3.南京林業(yè)大學信息學院,江蘇南京210037)摘要:研究壓縮、炭化過程中木材結構與化學成分的變化對壓縮炭化木的應用有重要意義。利用掃描電鏡、掃描電鏡X射線能譜和紅外光譜分析研究了楊木經(jīng)壓縮、炭化的微觀結構和木材的化學成分變化。研究發(fā)現(xiàn):意楊Populuseuroil~ricoll
2、ATt經(jīng)過壓縮、炭化后,細胞腔變小,胞壁距離減小,胞壁距離最大分別縮小56.94%和53.34%。但細胞壁本身仍然保持了其完整性;心邊材各元素的變化趨勢一致,炭元素上升,氧元素下降,以邊材為例.素材O/C為1.76,壓縮、炭化處理后分別為1.65,1.45;楊木在熱壓和高溫炭化過程中。纖維素的降解,使C—H伸縮振動吸收峰強度下降,并發(fā)生了一定的位移,半纖維素降解使C一0伸縮振動吸收峰強度降低.木質(zhì)素苯環(huán)和酚醚鍵C一0一C的伸縮振動吸收峰的變化說明木質(zhì)素也發(fā)生了化學反應.炭化后的心材在波數(shù)2853cm附近出現(xiàn)了明顯的振動.說明木材內(nèi)部復雜的化學反應產(chǎn)生了新的化學基團。圖9表1參15關鍵
3、詞:木材學;壓縮炭化;楊木;微觀結構;化學成分中圖分類號:$718.1;TQ351.21文獻標志碼:A文章編號:2095—0756(2012)05.0671.09MicrostructureandchemicalcompositionofcompressedandcarbonizedpoplarCHENChen,DENGYu-he,XULiao?,ZHOUYu。,CHENMin,WUJing,WANGXiang-ge!,YANGYing(1.CollegeofWoodScienceandTechnology,NanjingForestryUniversity,Naming210037
4、,Jiangsu,China;2.ZhejiangSublimationYunfengNewMaterialCo.Ltd.,Huzhou313200,Zhejiang,China;3.CollegeofInformation,NanjingForestryUniversity,Nanjing210037,Jiangsu,China)Abstract:Thestudyofmicrostructureandchemicalcompositionofcarbonizedwoodhasanimportantmeaningf0ritsapplication.Changesinmierostru
5、ctureandchemicalcompositionofcompressedandcarbonizedpoplar(Populuseuramevicana)werestudiedusingascanningelectronmicroscope(SEM),Energy—dispersiveX—rayspectrum(EDS)Analysis,andFourierTransformInfrared(F-FIR)Spectroscopy.ResultsshowedthatafterPoplarwascompressedandcarbonized.tomaintaincellwallint
6、egritythecellcavityandthedistancebetweenthecellwalls,whichreduced56.94%,53.34%atmaximum,noticeablydiminished.Elementcontentinthesapwoodandtheheartwoodvariedsimilarlyafterhot.pressingandaftercarbonizationwithcarboneontentin.creasingandoxygencontentdecreasing.Forexample,theC—over-Orationofuntreat
7、edwoodwas1.76,aftercompressedandcarbonized,therationreducedto1.65and1.45.CelluloseandhemieellulosedegradationledtoareductioninpeakabsorptionintensityforC—HandCOduringhot-pressingandcarbonizationwithsomedisplacementalsotakingplace.