1 Nhanganyaya
Parizvino, iyo huru mbichana zvinyorwa zvinoshandiswa mukugadzirira kwecellulose etherIkoroni, uye zviro zvinofanira kutsauka, uye mutengo wacho uchingomuka.
Uyezve, zvinowanzoshandiswa kugezeswa vamiririri vakadai so chloroacetic acid (yakanyanya muchetura) uye ethylene oxide (carcinogenic) inokuvadza zvakanyanya kumuviri wemunhu uye zvakatipoteredza. Bhuku
Muchitsauko chino, pine cellolose kuchena kwehukama kweanopfuura 90% kubviswa muchitsauko chechipiri kunoshandiswa seyakaisa zvinhu, uye sodium chloroletate uye 2-chlorootanol anoshandiswa sedzitsivi.
Uchishandisa akanyanya ane chepfu chloroacetic acid sekutsausa mumiririri, anoniccarboxymethyl cellose (cmc), Isiri-Ionic hydroxylll cellulose yakagadzirirwa.
Cellulose (Hec) uye yakasanganiswa hydroxytl carboxymyl cellever (Hecmc) nhatu cellulose ana vana. chimwe chinhu
Maitiro ekugadzirira ematatu emaseru eCellulose anaVana kubva pakuedza uye ekuedza kweOrthogonal, uye maCellenulose maCellulose anaitwo naFt-IR, H-NMR, etc.
Zvishongedzo zveCellulose Kuwedzera
Iyo nheyo ye cellulose kuwedzerwa inogona kukamurwa kuita zvikamu zviviri. Chikamu chekutanga ndechekuita kweAlkalization, ndiko kuti, panguva yea alkalization yekuita cellulose,
Zvakanyanyisa kupararira muNaoh Solution, pine cellowose inopika nechisimba pasi pechiitiko chekuzvimirira, uye nekuwedzera kwemvura
Huwandu hukuru hweNAHOOOH madiki mamorekuru akapinda mumukati memukati mekweta cellulose, uye akaitiswa nemapoka ehydroxyl pamhete yegirazi,
Inogadzira Alkali Cellulose, iyo inoshanda nzvimbo yeiyo eraitifitifitification maitiro.
Chikamu chechipiri ndiyo nzira yekutsika, ndiko kuti, maitiro ari pakati peiyo nzvimbo inoshanda uye sodium chloroacetate kana 2-chlorootanol pasi pealkaline mamiriro, zvichikonzera mukati
Panguva imwecheteyo, iyo yekuzadzisa mumiririri sodium chloroacetate uye 2-chlorolanol ichaburitsa imwe mwero wemvura pasi pemamiriro ezvinhu eAlkaline.
Maitiro emativi akatsunga kuburitsa sodium glycolate uye ethylene glycol, zvichiteerana.
2 yakaomeswa alkali decrystallization ekufungidzira kwe pine cellalose
Kutanga, gadzirira imwe yekuvharirwa kweNao Four mhinduro ine mvura. Zvadaro, pane kumwe kupisa, 2G ye pine fiber
Iyo vhitamini yakanyungudutswa mune imwe vhoriyamu yeNaoh Solution, yakakurudzirwa kwenguva yakati, uyezve yakatemwa yekushandisa.
Rwiyo rweMuenzaniso Mugadziri
Precision ph meter
Collector Type inogara ichipembera kupisa magineti
Vacuum vanoroora oven
Electronic chiyero
Kutenderera kwemvura mhando mizere-chinangwa vacuum pombi
Fourer Shanduko infrared spectrometer
X-ray diffracometer
Nuclear magineti resonance spectrometer
Hangzhou Aolilong chiridzwa CO., LTD.
Hangzhou Huichuang chiridzwa chemidziyo co., Ltd.
Shanghai Jinghong Equipment Vishini Comice Co, Ltd.
Mettler Toledo Zviridzwa (Shanghai) Co, Ltd.
Hangzhou David Sayenzi uye Dzidzo Instrument Co, Ltd.
American Thermo Fisher Co, Ltd.
American Thermoelectric Switzerland ArL Kambani
Swiss kambani bruker
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Kugadzirira kweCMCS
Uchishandisa Pine Wood Alkalale Cellalose neAlkali decrystallization seyakaisa zvinyorwa, uchishandisa ethanol se solvent uye uchishandisa sodium chloroacetate sekutsausa
CMC ine yakakwira DS yakagadzirirwa nekuwedzera Alkali kaviri uye kugadzirira mumiririri kaviri. Wedzera 2G yePine Wood Alkalal Cellalose Cellalose Cellalose Flask, wozowedzera imwe vhoriyamu ye ethanol sol sol solvent, uye kumutsa zvakanaka 30min
nezve, zvekuti alkali cellalose yakapararira zvizere. Wobva wawedzera imwe huwandu hweAlkali mumiririri uye sodium chloroacetate kuti uite kwenguva yenguva pane imwe tembiricha tembiricha
Mushure meTime, yechipiri yekuwedzera kweAlkaline mumiririri uye sodium chloroacetate inoteverwa nekutsva kwenguva yenguva. Mushure mekuita kwapera, kutonhorera pasi uye kutonhorera pasi, ipapo
Neutraize ine huwandu hwakakodzera hweblue acetic acitic acid, wobva wadhora firita, geza uye yakaoma.
Kugadzirira kweHacs
Uchishandisa Pine Wood Almalose Cellalose Cellalose neAlkali decrystallization seyakaisa zvinyorwa, ethanol se solvent uye 2-chlorolanol uye 2-chlorolanol seexification
Iyo hec ine yakakwira ms yakagadzirirwa nekuwedzera alkali kaviri uye ichitsvaga mumiririri kaviri. Wedzera 2G yePine Wood Alkali Cellalose Cellalose Cellalose Cellalose Flask, uye wedzera imwe vhoriyamu ye 90% (vhoriyamu) ethanol, stir
Kumutsa kwenguva yenguva yekupararira zvakakwana, wozowedzera imwe huwandu hweAlkali, uye zvishoma nezvishoma kupisa kumusoro, wedzera imwe vhoriyamu ye2-
Chloroethanol, its ntherst kurapa
Mushure mekunge kuitwa kwapera, kusarerekera neyakaenzana nehuwandu hwechiratidzo acetic acid, uye pakupedzisira firita negirazi (G3), geza, uye yakaoma.
Kugadzirira kweHemcc
Kushandisa himle yakagadzirirwa muna 3.2.3.4 seyakabikwa, ethanol seyekuita svikiro, uye sodium chlorodcetate seyenyengeri mumiririri kugadzirira
Hecmc. Maitiro echokwadi ndewekuti: Tora imwe huwandu hweec, chiise mune imwe 100 mL ina-necreck flask, wobva wawedzera imwe huwandu hwehuwandu hwehuwandu
90% ethanol, muchina kumutsa kwenguva yenguva yekuita kuti ive yakazara yakazara, wedzera huwandu hweAlkali mushure mekupenga, uye zvishoma nezvishoma wedzera
Sodium chloroacetate, iyo itsera pakugara uchiita tembiricha inopera mushure menguva yenguva. Mushure mekunge kuitwa kwacho kwapera, zvichimutsamwisa neakachenjera acetic acitic acet kuti zvidzivirire, wobva washandisa girazi firita (G3)
Mushure mekupedza filtration, kugeza nekuoma.
Kucheneswa kwe cellulose ana
Mukugadziriswa kwegadziriro ye cellulose ether, zvimwe zvigadzirwa zvinowanzogadzirwa, kunyanya iyo inororganic salus chloride uye imwe imwe
Kusvibiswa. Kuti uvandudze hunhu hwe cellulose ether, kuchenesa kwakareruka kwakaitwa pane yakawanikwa cellulose ether. Nekuti ivo vari mumvura
Pane imwe nzira yakasiyana-siyana, saka muedzo unoshandisa imwe vhoriyamu fananidzo yehydrate ethanol kuti anatse iyo yakagadzirirwa matatu cellulose ma cellulose.
shanduko.
Place the cellulose ether sample prepared with a certain quality in a beaker, add a certain amount of 80% ethanol that has been preheated to 60 ℃ ~ 65 ℃, and maintain mechanical stirring at 60 ℃ ~ 65 ℃ on a constant temperature heating magnetic stirrer for 10 ℃. min. Tora iyo supernatant kuoma
MuBeaker Beaker, shandisa sirivheri nitrate kuti utarise chloriz ions. Kana paine chena chaicho, chive chichitevera kuburikidza negirazi yefaira uye tora iyo yakasimba
Dzokorora nhanho dzakapfuura dzechikamu chemuviri, kusvikira iyo filtrate mushure mekuwedzera 1 kudonha kweAgno3 Solution haina chena, ndiko kuti, kucheneswa nekushambidza kwapera.
36
kupinda (kunyanya kubvisa iyo yekuita ne-chigadzirwa nacl). Mushure mekushayikwa kwemasikati, kuoma, kutonhora kumhepo tembiricha uye kuyera.
misa, g.
Bvunzo uye maitiro maitiro e cellulose ana
Kutsunga kwe degree rekutsiva (DS) uye molar degree rekutsiva (MS)
Kutsunga kweDS: Kutanga, kurema 0.2 g (chaiyo kusvika 0,1
80ml yemvura yakadzika, yakakurudzirwa mune yekudziya kwemvura yekushambadzira pa30 ℃ ~ 40 ℃ ye 10min. Wobva wagadzirisa ne sulfutic acid mhinduro kana lao mhinduro
ph yeiyo mhinduro kusvikira iyo pH yemhinduro iri 8. Ipapo mune beaker yakashongedzwa nePH Meter Electrode, shandisa mhinduro yakajairika yeSulfutic acid
Kune chegumi, pasi pemamiriro ekukurudzira, chengetedza iyo ph meter yekuverenga apo chegumi, apo iyo ph kukosha kwemhinduro yakagadziriswa kusvika ku3,74,
Kuitisa kunopera. Cherekedza iyo vhoriyamu ye sulfuric acid standard mhinduro inoshandiswa panguva ino.
Chizvarwa:
Iyo huwandu hwehuwandu hwepamusoro hweprotton nhamba uye iyo hydroxytHyl boka
Iyo chiyero chehuwandu hwezvikamu zvepamusoro; I7 ndiyo huwandu hweboka re methylene pane hydroxyteth boka
Kusimba kweProton Resonance Peak; ndiko kukura kweiyo Proton Resonance Peak ye5 methine mapoka uye imwe methylene group pane cellulose glucose unit
Sum.
Nzira dzekuyedza dzakarondedzerwa dzinotsanangurwa hunhu hwekutarisirwa kwematatu cellulose etana cmc, hec uye heecmc
Mutemo
3.2.4.3 XD Muedzo
X-ray file quatraction kuongororwa kwechiitiko chechitatu cellulose etana cmc, hec uye heecmc
Nzira yekubvunzwa inotsanangurwa.
3.2.4.4 Kuongororwa kweH-NMR
Iyo H NMR Spectrometer yeHEC yakayerwa neAvance400 H NMR SpectRometer yakagadzirwa neBruker.
Uchishandisa dimeted dimethyl sulfoxide se solvent, mhinduro yakaedzwa neyemagetsi hydrogen nmr spectroscopy. Iyo testrecy testence yaive 75.5mhz.
Inodziya, mhinduro ndeye 0.5ML.
3.3 Mhedzisiro uye kuongorora
3.3.1 Ongorora yeCMC Kugadziriswa Kwekugadzirira
Uchishandisa iyo pine cellense yakabviswa muchitsauko chechipiri sechipo, uye kushandisa sodium chloroacetate sekutsvagira mumiririri, iyo nzira yechokwadi yekuyedza yakatorwa,
Maitiro ekugadzirira eCMC akagadziridzwa, uye ekutanga akasiyana eyedzo akaiswa sezvakaratidzwa muTafura 3.3. Izvi zvinotevera ndeye hec gadziriro yekugadzirira
MuART, kuongorora kwezvinhu zvakasiyana-siyana.
Tafura 3.3 Chekutanga Chekuita Maitiro
Chivimbo chekutanga kukosha
Kufungidzira kushamwaridzana kupisa / ℃ 40
Kufungidzira Alkalizing nguva / h 1
Kufungidzira Solid-Liquid Ratio / (G / ML) 1:25
Kufungidzira LYE CONCENTRIRATION /% 40
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Iyo yekutanga nhanho yekuziya kupisa / ℃ 45
Chekutanga-Stage Kuwedzera Nguva / H 1
Chechipiri Stage Kuteedzera Kupisa / ℃ 70
Chechipiri Stage Kuwedzera Nguva / H 1
Base dosage mune ertifitifiyation nhanho / g 2
Huwandu hwekuzadzisa mumiririri muEtheifitification Stage / G 4.3
Its cherafied yakasimba-mvura ratio / (g / ml) 1:15
3.3.1.1 Kufurira zvinhu zvakasiyana-siyana paCMC Expution degree mune yekunyepedzera alkalization nhanho
1. Mhedzisiro yekunyepedzera alkalization tembiricha pane subthiction degree yeCMC
Kuti ufunge nezve mhedzisiro yekunyepedzera tsalization tembiricha pane iyo nhanho yekutsiva mune yakawanikwa cmc, mune iyo yekugadzirisa zvimwe zvinhu sekutanga tsika,
Pasi pemamiriro ezvinhu, mhedzisiro yekunyepedzera tsalization tembiricha paCMC yekutsiva degree inokurukurwa, uye mhedzisiro inoratidzwa muPi.
Kufungidzira kushamwaridzana kupisa / ℃
Mhedzisiro yekunyepedzera kushamisika tembiricha paCMC yekutsiva degree
Zvinogona kuoneka kuti mwero wekutsiva kweCMC anowedzera nekuwedzera kweiyo yekunyepedzera kushomeka kwekutonhora, uye tembiricha yekudziya ndeye 30 ° C.
Madhigirii ari pamusoro pekutsiva anoderera nekuwedzera tembiricha. Izvi zvinodaro nekuti tembiricha yekudziya yakanyanya kuderera, uye mamorekuru haishande uye asingakwanisi
Zvinobudirira zvinobudirira nzvimbo yekristaro ye cellulose, iyo inoita kuti zviome kune iyo yekuzadzisa mumiririri kuti uise mukati memasoloko mune yekutsika-extitifiti, uye degree reKuita rakakwirira.
yakaderera, inokonzeresa mune yakaderera degree rekutsiva kwechigadzirwa. Nekudaro, tembiricha yekudziya haifanire kunge yakanyanya. Sezvo tembiricha inowedzera, pasi pechiitiko chekupisa kwakanyanya uye alkali yakasimba,
Cellulose inowanzoita oxidative degradation, uye iyo degree rekutsiva kwechigadzirwa Cmc inoderera.
2.
Pasi pemamiriro ezvinhu ekutambisa alkalization tembiricha iri makumi matatu ° C uye zvimwe zvinhu ndiwo maitiro ekutanga, mhedzisiro yekunyepedzera nguva yekunyepedzera paCMC inokurukurwa.
Mhedzisiro yekutsiva. Degree rekutsiva
Kufungidzira Alkalizing nguva / h
Mhedzisiro yeAppredment Alkalinization Nguva paCmcSubcitution degree
Kubata kwebubhu pachawo kuri kukurumidza, asi iyo alkali solual inoda imwe nguva yakashata munguva yeiyo fiber.
Inogona kuoneka kuti kana nguva yekusagadziriswa iri 0.5-1.5h, iyo subthiction yechigadzirwa inowedzera nekuwedzera kweAlkalization nguva.
Dhigirii rekutsiva kwechigadzirwa yakawanikwa yaive yepamusoro iyo nguva yaive 1.5H, uye iyo nhanho yekutsiva yakadzikira nekuwedzera kwe1,5H. Izvi zvinogona
Zvingave nekuti pakutanga kweshoko, nekuwedzera kweshoko rezvakare, kupindurwa kweAlkali to cellulose kwakaringana, zvekuti fiber
Iyo prime kugadzirwa kwakanyanya kugadzikana, kuwedzera iyo yekuzadzisa mumiririri uye iyo inoshanda pakati
Kutumira Nguva: Kubvumbi 26-2024