1. Dulmar:
Cellulose ether waa iskudhis dabiici ah oo polymer ah, qaab dhismeedkeeda kiimikaad waa macromolecule polysaccharide ah oo ku saleysan anhydrous β-glucose, waxaana jira hal koox hydroxyl aasaasiga ah iyo laba kooxood oo hydroxyl sare ah giraan kasta oo saldhig ah. Iyada oo la adeegsanayo wax ka beddelka kiimikaad, taxane ah oo ka soo jeeda cellulose ayaa la heli karaa, iyo ether cellulose waa mid iyaga ka mid ah. Cellulose ether waa xarun polymer ah oo leh qaab dhismeed ether ah oo ka samaysan cellulose, sida methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, iwm. , propylene oxide ama monochloroacetic acid.
2. Waxqabadka iyo Tilmaamaha:
(1) Astaamaha muuqaalka
Eter cellulose guud ahaan waa caddaan ama caano cad, aan ur lahayn, aan sun ahayn, budada suufka ah ee dareeraha ah, fududahay in la nuugo qoyaanka, oo ku milma kolloid deggan oo hufan oo biyo ah.
(2) Samaynta filimada iyo ku dhegganaanshaha
Etherification ee ether cellulose ayaa saameyn weyn ku leh sifooyinkeeda iyo waxqabadkeeda, sida milanka, awoodda sameynta filimka, xoogga curaarta iyo caabbinta milixda. Eter cellulose waxay leedahay awood farsamo oo sare, dabacsanaan, caabbinta kulaylka iyo iska caabinta qabowga, waxayna si fiican ugu habboon tahay resins iyo caagadaha kala duwan, waxaana loo isticmaali karaa in lagu sameeyo balaastiig, filimaan, fayrasyo, dhejisyo, cinjir iyo alaabada dahaarka daawada, iwm.
(3) Xoolo
Methylcellulose waxay ku milmi kartaa biyo qabow, oo aan lagu milmin biyaha kulul, iyo sidoo kale ku milma qaar ka mid ah dareerayaasha organic; methyl hydroxyethyl cellulose waxay ku milmi kartaa biyo qabow, oo aan lagu milmin biyaha kulul iyo dareerayaasha organic. Si kastaba ha ahaatee, marka xalka biyaha ee methylcellulose iyo methylhydroxyethylcellulose la kululeeyo, methylcellulose iyo methylhydroxyethylcellulose ayaa soo kicin doona. Methylcellulose wuxuu soo da'ayaa 45-60 ° C, halka heerkulka roobka ee methyl hydroxyethyl cellulose ee isku dhafan uu kordho ilaa 65-80 ° C. Marka heerkulku hoos u dhaco, da'da ayaa dib u milmaantaa. Hydroxyethyl cellulose iyo sodium carboxymethyl hydroxyethyl cellulose waxay ku milmaan biyaha heerkul kasta oo aan lagu milmin dareerayaasha organic.
(4) dhumucdi
Eter cellulose wuxuu ku milmaa biyaha qaabka kolloidal, iyo viscosity ay ku xiran tahay heerka polymerization eter cellulose. Xalku wuxuu ka kooban yahay macromolecules fuuqbaxay. Sababtoo ah isku-xidhka makromolecules, habdhaqanka qulqulka xalalku wuu ka duwan yahay dareeraha Newtonian, laakiin wuxuu muujiyaa dabeecad isbeddelaya isbeddelada xoogga xiiridda. Sababtoo ah qaab dhismeedka macromolecular ee ether cellulose, viscosity ee xalku si degdeg ah ayuu u kordhiyaa korodhka xoojinta oo si degdeg ah hoos ugu dhaco korodhka heerkulka.
Codsiga
(1) Warshadaha shidaalka
Sodium carboxymethyl cellulose waxaa inta badan loo isticmaalaa soo saarista saliidda, waxaana loo isticmaalaa samaynta dhoobada si loo kordhiyo viscosity iyo yareeyo khasaaraha biyaha. Waxay iska caabin kartaa wasakhowga milixda ee kala duwan waxayna kordhin kartaa soo kabashada saliidda. Sodium carboxymethyl hydroxypropyl cellulose (NaCMHPC) iyo sodium carboxymethyl hydroxyethyl cellulose (NaCMHEC) waa qodida wanaagsan ee wakiilada daaweynta dhoobada iyo walxaha loogu talagalay diyaarinta dareeraha dhamaystirka, oo leh heerka slurrying sare iyo caabbinta milix, Waxqabadka wanaagsan anti-kalsiyum, viscosity-kordhinta awoodda, heerkulka iska caabinta (160 ℃) hanti. Waxay ku habboon tahay diyaarinta dareeraha qodista biyaha cusub, biyaha badda iyo biyaha cusbada leh. Waxa loo qaabayn karaa dareere qodista cufnaanta kala duwan (103-127g/cm3) ee miisaanka calcium chloride hoostiisa, waxana uu leeyahay viscosity gaar ah iyo dareere yar oo lumay, awoodiisa kordhinta viscosity iyo luminta awoodda yaraynta dareeraha ayaa ka wanaagsan hydroxyethyl cellulose , waana wax lagu daro oo wanaagsan kordhinta wax soo saarka saliidda.
Sodium carboxymethyl cellulose waa soosaar cellulose ah oo si ballaaran loo isticmaalo habka soo saarista saliidda. Waxaa loo adeegsadaa dareeraha qodista, dareeraha sibidhka, dareeraha dillaaca iyo hagaajinta soo kabashada saliidda, gaar ahaan dareeraha qodista. Waxay inta badan ka ciyaartaa doorka yaraynta luminta dareeraha iyo kordhinta viscosity. Hydroxyethyl cellulose (HEC) waxaa loo isticmaalaa sidii dhoobo dhumucdi iyo xasilinta habka qodista, ceelka dhamaystirka iyo sibidhka. Marka la barbardhigo sodium carboxymethyl cellulose iyo guar xanjo, hydroxyethyl cellulose waxay leedahay saameyn dhumuc wanaagsan, hakinta ciidda xooggan, awoodda milixda sare, caabbinta kulaylka wanaagsan, iska caabin yar oo isku dhafan, lumis dareere yar, iyo jel jebinta. Block, hadhaaga hoose iyo sifooyin kale, ayaa si weyn loo isticmaalay.
(2) Warshadaha dhismaha iyo rinjiga
Sodium carboxymethyl cellulose waxaa loo isticmaali karaa dib-u-dhige, wakiilka haynta biyaha, dhumucda iyo xidhaha si loo dhiso dhogorta iyo dhajinta isku-darka hoobiyeyaasha, waxaana loo isticmaali karaa sida plaster, hoobiye iyo qalabka dhulka lagu simo saldhigga gypsum iyo saldhigga sibidhka Waxaa loo isticmaalaa sida kala firdhisan, biyo. wakiilka haynta iyo dhumucyada. Masonry gaar ah iyo isku dhejinta hoobiyeyaal ka samaysan karboxymethyl cellulose, taas oo wanaajin karta shaqada, xajinta biyaha iyo iska caabinta dildilaaca ee hoobiye, kana fogaato dildilaaca iyo bannaanka derbiga block. durbaan. Qalabka qurxinta dusha sare ee dhismaha Cao Mingqian iyo kuwa kale ayaa ka sameeyay shay qurxinta dusha sare ee deegaanka saaxiibtinimo ku leh methyl cellulose. Habka wax soo saarku waa mid fudud oo nadiif ah. Waxaa loo isticmaali karaa darbiga heerka sare ah iyo sagxadaha dhoobada dhagaxa, waxaana sidoo kale loo isticmaali karaa qurxinta dusha sare ee tiirarka iyo taalloyinka.
(3) Warshadaha kiimikada maalinlaha ah
Viscosifier sodium carboxymethyl cellulose ee xasilinta ayaa ka ciyaara doorka kala firdhinta iyo xasilinta joojinta ee alaabta koollada ah ee alaabta cayriin ee budada adag, waxayna ka ciyaaraan doorka dhumucda, kala firdhinta iyo isku-dhafka dareeraha ama qurxinta emulsion. Waxa loo isticmaali karaa xasiliye iyo tackifier ahaan. Xasijiyeyaasha Emulsion waxa loo isticmaalaa sidii emulsifiers, dhumucyo iyo xasiliyayaal boomaatada iyo shaambooyinka.Sodium carboxymethyl hydroxypropyl cellulosewaxa loo isticmaali karaa xasiliye ahaan xabagta cadayga. Waxay leedahay sifooyin thixotropic wanaagsan, taas oo ka dhigaysa cadayga wanaagsan qaabaynta, kaydinta muddada-dheer iyada oo aan qalloocin, iyo labis iyo dhadhan jilicsan. Sodium carboxymethyl hydroxypropyl cellulose waxa ay leedahay iska caabin milix ah oo heer sare ah iyo iska caabin aashito ah, saamaynteeduna aad ayay uga sarraysaa kan carboxymethyl cellulose. Waxa loo isticmaali karaa sidii dhumuc ka samaysan saabuunta iyo wakiilka wasakhda. Dhumucda kala firdhisa ee soo saarista saabuunta, sodium carboxymethylcellulose waxa guud ahaan loo isticmaalaa sida wasakhda biyaha lagu dhaqo, dhumuc iyo kala firdhiso saabuunta dareeraha ah.
(4) Daawooyinka iyo warshadaha cuntada
Warshadaha dawooyinka, hydroxypropyl karboxymethylcellulose (HPMC) waxaa loo isticmaali karaa sidii dawo daroogo ah, oo si weyn loogu isticmaalo matrix daroogada afka laga ilaaliyo siidaynta iyo diyaarinta sii daynta joogtada ah, sida wax sii dayn ah si loo habeeyo sii deynta daroogada, sida wax daahan si loo daahiyo Siidaynta. qaabaynta, pellets sii-daynta fidsan, kaabsoosha sii-daynta fidsan. Kuwa ugu badan ee la isticmaalo waa methyl carboxymethyl cellulose iyo ethyl carboxymethyl cellulose, sida MC, kuwaas oo inta badan loo isticmaalo samaynta kiniiniyada iyo kaabsal, ama in lagu dahaadho kaniiniyada sonkorta leh. Ethers-cellulose oo heer sare ah ayaa loo isticmaali karaa warshadaha cuntada, waxayna yihiin dhumucyo wax ku ool ah, xasiliyayaal, wax-soosaarayaal, wakiilada biyaha celiya iyo wakiilada xumbo farsamaysan ee cuntooyinka kala duwan. Methyl cellulose iyo hydroxypropyl methyl cellulose ayaa loo aqoonsaday inay yihiin walxo dheef-shiid kiimikaad ah oo aan waxyeello lahayn. Nadiifin-sare (oo ka sarreeya 99.5%) karboksymethylcellulose (CMC) ayaa lagu dari karaa cuntada, sida caanaha iyo waxyaabaha labeenta, xashiishyada, macaanka, jelly, cunto qasacadaysan, sharoobada miiska iyo cabitaannada. Carboxymethyl cellulose oo leh nadiif ah in ka badan 90% ayaa loo isticmaali karaa dhinacyada cuntada la xiriira, sida gaadiidka iyo kaydinta miraha cusub. Noocaan caagga ah wuxuu leeyahay faa'iidooyinka saamaynta cusub ee haynta wanaagsan, wasakhowga yar, waxyeello ma laha, iyo wax soo saarka makaanaysan fudud.
(5) Qalabka shaqada indhaha iyo korantada
Dejinta dhumucda korantada waxay leedahay nadiif sare oo ah ether cellulose, caabbinta acid wanaagsan iyo caabbinta milixda, gaar ahaan birta yar iyo maadada birta culus, sidaas darteed kolloidku waa mid aad u deggan, oo ku habboon baytariyada alkaline, baytariyada zinc-manganese ee xasilinta dhumucda Electrolyte. Ethers badan oo cellulose ah ayaa muujiya crystallinity dareere heerkulbeeg ah. Hydroxypropyl cellulose acetate waxay samaysaa kiristaalo dareeraha kolestaroolka ah ee ka hooseeya 164°C.
Waqtiga boostada: Jan-12-2023