Cellulose ether is a synthetic polymer yakagadzirwa neyakajairika cellulose seyakagadzirwa zvinyorwa nemakemikari kugadzirisa. Cellulose ether ndeyekuti inobviswa kwechisimba cellulose, cellherose ether kugadzirwa uye synthetic polymer yakasiyana, zvinhu zvayo zvakanakisa mheremalose, zvakasikwa Polymer makomendi. Nekuda kweiyo kunyanya kweiyo yakasikwa cellulose chimiro, cellulose pachayo haina kugona kuita nekutsvagira mumiririri. Asi mushure mekurapa kwekuzvimba kwemumiriri, iyo yakasimba hydrogen maketani uye ngetani dzakaburitswa muAthsia Cellulose.
Zvivakwa zveCellulose anaTers vanovimba nerudzi rwevanhu, nhamba uye kugoverwa kwevatsidzike. Kugadziriswa kwe cellulose ether kunoenderana nerudzi rwevatsidzi, degree rekutsvaga, solubility uye application yekunyorwa inogona kuiswa. Zvinoenderana nerudzi rwevatsidzike pamachinda molencular, chinogona kukamurwa kuita ereth uye yakasanganiswa ether. MC inowanzoshandiswa seyakasarudzika ether, nepo hpmc iri yakasanganiswa ether. Methyl cellulose ether mc is a cellulose celloxal Chigadzirwa, iyo formula formula is [c6h7o2 (o) 3-mn (och2ch (och2ch (och3ch (och3) ch3]
Kubva kuSalubility inogona kukamurwa kuita Ionic mhando uye isiri-ionic mhando. Mvura-Inokunyaradza isiri-Ionic cellulose ether inonyanya kuumbwa neAthyl Ether uye hydroxyl alkyl ether maviri akatevedzana. Ionic cmc inonyanya kushandiswa muSynthetic Decengent, machira, kudhinda, chikafu uye peturu yekubatwa peturu. Asiri-ionic mc, hpmc, hemc, hemc uye zvimwe zvinonyanya kushandiswa muzvivakwa zvekuvaka, marara eLatex, mushonga, zuva nezuva chemistry uye zvimwe zvinhu. Semumiriri wakakora, kudzokorora kwemvura, STabilizer, kuparadzira, firimu kuumba mumiririri.
Cellulose ether mvura yekuchengetwa
Mukugadzirwa kwezvinhu zvekuvakisa, kunyanya kuomesa kusanganisa, cellulose ether inoita basa risingaperi, kunyanya mukugadzirwa kweanokosha moter (yakagadziridzwa), chikamu chakakosha.
Basa rakakosha remvura-soluble cellulose verar vanonyanya kuve nezvinhu zvitatu, iyo yechipiri ndiyo pesvedzero yemota yekusimbisa uye iyo yechipiri, uye yechitatu kudyidzana neiyo simende.
Cellulose ether kudzokorora kwemvura, zvinoenderana neshamba yehydroscopicpicity, kuumbwa kwemota, motsizi gohwo, mongororo yemvura inodikanwa, nguva yekudzora. Kuchengetwa kwemvura kwe cellulose ether inouya kubva kuSalubility uye kushomeka kwemheremellose ether pachayo. Zvinonyatsozivikanwa kuti mheremalose ngetani, kunyangwe iine nhamba yakakura kwazvo yakanyanya kuwanda Iko kugona kwehydration yeiyo hydroxyl mapoka ega haina kukwana kubhadhara iyo yakasimba intermolecular hydrogen zvisungo uye van der waals mauto. Kana vasori vakatsiva vakaunganidzwa mumachireni ehembe, kwete chete izvo zvisizvo zvinoparadza iyo hydrogen ketani, asi zvakare interchain hydrogen zvisungo zvinoputswa nekuda kwekudyidzana kwevanhurume pakati pemaketani ari pedyo. Iyo yakakura iyo istsints ndeye, iyo yakakura chinhambwe pakati pemamorekuru ndebvu. Kupfuura Kuparadza kweHydrogen Chibvumirano, Cellulose Lattice Kuwedzera, mhinduro muCellulose Ether inova manyorerwo, iyo yekuumbwa kweiyo viscosity yakakwira. Sezvo tembiricha inosimuka, hydration yemapolymer inoderera uye mvura pakati pemaketani inodzingwa. Kana iyo yakasviba mhedzisiro yakwana, mamorekuru anotanga kuunganidzwa uye gel inopinda mune matatu-dimensional network. Zvinhu zvinokonzeresa kuchengetwa kwemvura kwerufu zvinosanganisira cellulose ether viscosity, dosage, cheturu pini uye tembiricha yebasa.
Iyo yakakura iyo viscosity ye cellulose ether, iri nani kuchengetedza kwemvura, iyo viscosity ye polymer solution. Kurema kwemanyorerwe (degree rePolymerization) yePolymer zvakare nehurefu uye morphology yeiyo molecular chimiro cheketani, uye kugoverwa kwehuwandu hwevanhu vakanyatsobata huwandu hwehuwandu hwehuwandu. [ETA] = KMALPHA
Intrinsic viscosity yePolymer Solutions
M polymer molecular uremu
α polymer hunhu hunogara
K Viscosity Solution Coefficient
Iyo viscosity yePolymer Solution zvinoenderana neiyo molecular uremu hwePolymer. Iyo viscosity uye kusunganidzwa kwemherekukwereta ether mhinduro zvine chekuita nezvakawanda zvinoshandiswa. Naizvozvo, imwe neimwe cellulose ether ine akawanda akasiyana viscossation, merudzi rweviscouly zvakanyanya kuburikidza nekusvibiswa kweAlkali cellulose, kureva kupwanya kwe cellulose molecular cheni kuti uwane.
Yehukuru hwechikamu, iyo yakanakisa iyo tangi, iri nani kuchengetwa kwemvura. Zvikuru zvevakakura zve Cellulose Elether kusangana nemvura, pamusoro pazvo pakarepo kuputira mamorekuru, dzimwe nguva nguva yekudzvinyirira haina kunyorwa, kuumbwa kweiyo madhaka fletuclent kana agglomerate. Iyo solubility ye cellulose ether ndiyo imwe yezvinhu kusarudza cellulose ether.
Kuremedza uye iyo thisiotropy ye cellulose ether
Iyo yechipiri mhedzisiro ye cellulose ether - inokakavara zvinoenderana ne: Cellulose ether Polymerization degree, mhinduro yekusimbisa, Shear rate, tembiricha nemamwe mamiriro ezvinhu. Iyo yegwenzi yezvivakwa zvemhinduro yakasarudzika kuAlkyl cellelose uye yakagadziridzwa ayo akagadziridzwa. Magasi ega ane hukama nedhigirii rekutsiva, mhinduro yekusimbisa uye yekuwedzera. Kune hydroxyl alkyl yakagadziridzwa inobva, midziyo yeGel inoenderana neiyo degree re hydroxyl alkyl shanduko. Kune mhinduro yekugadzirisa kweiyo low viscosity mc uye hpmc inogona kugadziriswa 10% solution mc uye hpmc inogona kungogadzirira 2% -3% yeCellulose ether yakanyorwa ne1% -2% mhinduro. Yakakwira molecular uremu cellulose ecthese effelency yekubudirira, yakasarudzika manyorerwe uye maVelecular uremu, [in) = 2.92 Yakadzika molecular uremu cellulose ether kuti uwedzerezve kuti uzadzise iyo yekutarisa viscosity. Viscoity yayo isinganyanyi kutsamira pane Sheku Naizvozvo, kuti uwane kumwe kusimba, imwe huwandu hwe cellulose ether (kusunganidzwa kwemhinduro) uye mhinduro viscosity inofanira kuvimbiswa. Iyo tembiricha yemhepo yemhinduro yakadzikira mutsara nekuwedzera kwekuwedzera kwekusangana kwemhinduro, uye gelation yakaitika pakamuri tembiricha mushure mekusvika pane imwe pfungwa. HPMC ine yakakwira gelation yekuvhara pamhepo tembiricha.
Kuenderana kunoenderana kunogona zvakare kuchinjirwa nekusarudza sizele size uye cellulose ana vana nemadhigiri akasiyana ekugadziridzwa. Iyo inonzi sumo kuiswa kwehydroxyl alkyl boka mune imwe nhanho yekutsiva pane skeleton chimiro cheMC. Nekushandura kukosha kwekutsiva kwezvinhu zviviri zvevakadzorerwa, izvo, iyo DS uye ms inoenderana nekutsiva maitiro emhando uye hydroxyl mapoka. Zvivakwa zvakasiyana-siyana zve cellulose ether zvinodiwa nekuchinja hunhu hwekutsiva hwemhando mbiri dzevakadzorerwa.
hukama pakati pekuenderana uye kuchinjika. Mumufananidzo 5, kuwedzera kwe cellulose ether zvinokanganisa mvura yemvura uye inoshandura iyo-binder-binder chiyero chemvura uye simende, iri kukura, iyo ndiyo isiriyo. Iyo yakakwira dosage, iyo yakawanda mvura yekudhara.
Cellulose anaiters inoshandiswa muPowder zvekuvaka zvinhu zvinofanirwa kunyungudutsira nekukurumidza mumvura inotonhora uye kupa iyo system nehurongwa hwakakodzera. Kana iyo yakapihwa shear chiyero ichiri flucculent uye colloidal icho chiri chishandiso kana chisina kunaka mhando chigadzirwa.
Kune zvakare hukama hwakanaka hwehukama pakati pehukama hwekusimbisa kusimba uye dosagulose ether, cellherose ether inogona kuwedzera kwazvo zvevhu, iyo huru iyo dosage, iyo yakanyanya kunaka, iyo iri pachena mhedzisiro.
Cellulose ether mhinduro yemhedzisiro ine yepamusoro viscosity ine yakakwira thixotropy, iyo iri imwe yehunhu hwema cellulose ether. Mhedzisiro yemamiriro ekunze eMC mhando Polymers anowanzove nePseudoplastic, isina-thixotropic fluidity pazasi pavo dengre temperature, Pseudoplasticality inowedzera nekuwedzera kweiyo molecular uremu kana kusangana kwemheremalose ether uye yakazvimiririra yemhando yepamusoro uye degree. Naizvozvo, carulose eter eigheni yeiyo viscosity giredhi, ingave mc, hpmc kana hemc, gara uchiratidza zvinhu zvakafanana zve rateological kwenguva yakareba sekusangana uye tembiricha ichiramba ichiripo. Kana tembiricha ichivhurika, kuumbwa gel inoumbwa uye yakakwira thixotropic kuyerera kunoitika. Cellulose ana vana neakanyanya kusunganidzwa uye yakaderera viscosity inoratidza thiskropy kunyangwe pazasi pegomba tembiricha. Ichi chivakwa chinobatsira kwazvo kuvakwa kwekuvaka moter kuti gadzirise kuyerera kwayo uye kuyerera kwehuremu. Zvinoda kutsanangurwa pano iyo yakakwira viscosity ye cellulose ether, iko zviri nani kuchengetwa kwemvura, asi kukwirira kwemvura, kuderedzwa kwakaenzana kwekunetseka, iko kunokanganisa kusanzwisisika kwerukudzo. Iyo yepamusoro iyo viscosity, zvakanyatsojeka mhedzisiro yemota, asi hachisi hukama hwakakwana huzere. Vamwe viscossity yakaderera, asi yakagadziridzwa cellulose inosimbisa mukuvandudza simba rekuumbwa kwemutumbi ane simba, nekuwedzera kwe viscosity, cellulose ether mvura yekuchengetwa kwemvura yakavandudzwa.
Kutumira Nguva: Mar-30-2022