Cellulose ether is a synthetic polymer yakagadzirwa kubva kune yakasikwa cellerse kuburikidza nemakemikari kugadziridzwa. Cellulose ether ndiyo inobviswa kwemasikirwo cellulose. Iko kugadzirwa kwe cellulose ether kwakasiyana nePolythetic polymers. Yayo yakakosha zvinyorwa ndeye cellulose, iyo yakasikwa polymer yakaenzana. Nekuda kwekuva kunyanya kwechimiro chemasangano cellulose, cellulose pachayo haina kugona kuita nevamiriri evaera. Nekudaro, mushure mekurapa kwekuzvimba kwekuzvimba, iyo yakasimba maHydrogen maketani uye ngetani dzinoparadzwa, uye kuburitswa kweiyo hydroxyl boka rinova alkali alkali alkalal. Tora cellulose ether.
Zvivakwa zveCellulose anaTers vanovimba nerudzi rwevanhu, nhamba uye kugoverwa kwevatsidzike. Kugadziriswa kwe cellulose ana vana zvakare kunoenderana nerudzi rwevatsidzi, degree rekutsva, solubility uye zvinoenderana nekushandisa zvivakwa. Sekureva kwerudzi rwevatsidzike pamachinda monescular, inogona kukamurwa muMono ether uye yakasanganiswa ether. Isu tinowanzo shandisa mc seyo mono ether, uye hpmc seanosanganiswa ether. MetHyl Cellulose ether MC ndiyo chigadzirwa mushure meiyo hydroxyl boka pane glucose unit yemusango cellows inotsiviwa nedunhu. Iyo formula ye [CO H7O2 (OH) 3-H (H (OCH3) H.Chigadzirwa yakawanikwa nekutsiva chikamu cheiyo hydroxyl boka pane imwe nzvimbo neiyo nzira neiyo hydroxpropropropropyl boka. Iyo formula ye [C6H7O2 (OH) 3-MN (Och3) -M [Och2ch (OH) X kune Hydroxyl Hemc, ndedzipi marudzi makuru anoshandiswa zvakanyanya uye kutengeswa mumusika.
Panyaya yekugadzirisa, inogona kukamurwa kuita ionic uye isiri-ionic. Mvura-yakashata isiri-ionic cellery ana ana ana ana inonyanya kuumbwa nenhevedzano maviri eAlkyl yeAlkyl uye hydroxielinkyl anaiters. Ionic cmc inonyanya kushandiswa mu synnthetic inodzika, machira ekudhinda uye kunyepa, chikafu uye kusaongorora kwemafuta. NON-IONIC MC, HPMC, HEMC, etc. Izvo zvinonyanya kushandiswa muzvivakwa zvekuvaka, Latex pendi, mushonga, zuva nezuva kemikari zvichingodaro. Inoshandiswa seanoti, mvura inochengetedza mumiririri, stabilizer, kuparadzira uye firimu kuumba mumiririri.
Kuchengeta kwemvura kwe cellulose ether
Mukugadzirwa kwezvinhu zvekuvakisa, kunyanya kuoma-kwakasanganiswa-mhereme ether kunoita basa risingaperi, kunyanya mukugadzirwa kweanokosha motsi (yakagadziridzwa motokari), chinhu chakakosha uye chakakosha chinhu.
Basa rakakosha remvura-solulable cellulose ecther vanonyanya kuve nematanho, imwe yakanakisa mvura, iyo iri pesvedzero yekuenderana uye yechitatu kudyidzana neiyo simende.
Iyo yekuchengetwa kwemvura yemubatanidzwa ether inoenderana nemvura yekunyura kweiyo chigadziko cheshuwa, kuumbwa kweiyo dhudzi, iyo mvura yekudonha, uye nguva yekuisa yemvura. Kuchengetwa kwemvura kwemasero ether pachayo kunobva pane iyo solubility uye kushomeka kwemheremalose ether pachayo. Zvinonyatsozivikanwa kuti kunyangwe iyo cellulose molecular ine huwandu hwe hydratable yakanyanya kunaka oh mapoka, haina kunyorova mumvura, nekuti chimiro cheCellulose chine mwero wakanyanya wekrisimasi. Iko kugona kwehydration yeiyo hydroxyl mapoka chete hakuna kukwana kuvhara iyo yakasimba hydrogen zvisungo uye van der waals mauto pakati pemamorikisi. Naizvozvo, zvinongotsvaira asi hazvipfuuri mumvura. Kana iyo substituent ikasvitswa mumatehwe echinyakare Iyo yakakura iyo isiriyo, iyo yakakura chinhambwe pakati pemamorekuru. Kureba kwacho. Mhedzisiro yakakura yekuparadza maHydrogen zvisungo, iyo cellulose ether inova mvura-solulable mushure meCellulose LATTE uye mhinduro inopinda, inogadzira mhinduro yepamusoro-viscosity. Kana tembiricha ikasimuka, hydration yePolymer inopera simba, uye mvura pakati pemaketani inodzingwa. Kana iyo yekushomeka mhedzisiro yakaringana, mamorekuru anotanga kuunganidzwa, achigadzira matatu-matatu emhando network network gl uye akapetwa kunze. Zvinhu zvinokanganisa kuchengetwa kwemvura kwerudzi zvinosanganisira vhiza ye cellulose ether, iyo mari yakawedzera, iyo yakajeka yezvikamu uye tembiricha yekushandisa.
Iyo yepamusoro iyo viscosity ye cellulose ether, iri nani kuchengetedza kwemvura, uye yakakwira viscosity ye polymer solution. Zvichienderana neiyo molecular uremu (polymerization degree) ye polymer, iyo yakagadziridzwa neketani yemanyorerwo echirimo, uye kugoverwa kwemhando uye huwandu hwevanhu vanozvidzora zvakanangana nekwavo viscosity.
[η] = km α
[11] intrinsic viscosity yePolymer Solution
m polymer molecular uremu
α polymer hunhu hunogara
K Viscosity Solution Coefficient
Iyo viscosity yePolymer Solution zvinoenderana neyekumusoro uremu hwemapolymer. Iyo viscosity uye kusunganidzwa kwemherekukwereta ether mhinduro ine chekuita nekunyorera muminda dzakasiyana siyana. Naizvozvo, imwe neimwe cellulose ether ine akawanda akasiyana viscossation, uye kugadziridzwa kwemasvomhu kunonyanya kuzadzikiswa nekushambidzika kweAlkali Cellalose, ndiko kuti, kutyora cellulose macoins.
Inogona kuoneka kubva kune nhamba 1.2 iyo yakakura huwandu hwe cellulose ether yakawedzerwa kune durari, iri nani pakurarama kwemvura, uye yakakwira viscosity, iri nani pakuita kwemvura.
Nezvehukuru hwenzvimbo, iyo yakanakisa chetenyo, iko zviri nani kuchengetwa kwemvura kuchiona nhamba 3 Dzimwe nguva hazvigone kugadzikana pamwe nekunyungudutswa kunyangwe mushure menguva refu kusimudzira, kuumba makore ekuwedzera furccucleent solution kana kuunganidzwa. Zvinokuvadza zvakanyanya kuganhurirwa kwemvura kune iyo cellulose ether, uye solubility chimwe chezvinhu zvekusarudza cellulose ether.
Kuremedza uye iyo thisiotropy ye cellulose ether
Basa repiri reCellulose ether - Kukora zvinoenderana ne: Dhigirii rePolymerization yeCellulose Ether, Solution Convertation, Shear Kukura, Tembiricha Nemamwe Mamwe Marudzi uye Zvimwe Tembiricha Nemamwe Mamwe Marudzi uye Zvimwe Tembiricha Nemamwe Mamwe Marudzi uye Mamwe Mamiriro neMamwe Marudzi uye Mamwe Mamiriro neMamwe Marudzi uye Mamwe Mamiriro neMimwe Mamwe Mamiriro neMamwe Mamiriro neMamwe Mamwe Mamiriro neMamwe Mamwe Mamiriro neMamwe Mamiriro Nezve Mamwe Marudzi. Iyo gelling midziyo yemhinduro yakasarudzika kuAlkyl cellelose uye yakagadziridzwa ayo yakagadziriswa. Iyo gelation zvivakwa zvine chekuita neyero yekutsiva, mhinduro yekusimbisa uye yekuwedzera. Kune hydroxylkyllk yakagadziridzwa inobva YEMAHARA uye HPMC ine yakaderera viscosity, 10% -15% Solitration Solution inogona kuve yakagadzirirwa yepamusoro viscosity Yakakwira-molecular-uremu cellulose ether ine yakanyanya kuremerwa kugona. Polymers ane akasiyana masero emanyoreti ane maVisikopu akasiyana mumhinduro yakafanana. Yakakwirira degree. Iyo target viscosity inogona chete kuwanikwa nekuwedzera huwandu hwakawanda hwehuwandu hwakareba hwemanyorerwe ecelose ether. Viscosity yayo ine zvishoma kutsamira pajecha ratehwe, uye iyo yepamusoro viscosity inosvika pakuvatisa viscosity, uye iyo inodiwa yekuwedzera huwandu idiki, uye iyo viscosity zvinoenderana nekubudirira kwekubudirira. Naizvozvo, kuti uwane kumwe kusimba, imwe huwandu hwe cellulose ether (kusunganidzwa kwemhinduro) uye mhinduro viscosity inofanira kuvimbiswa. Iyo tembiricha yemhedzisiro yemhindurowo zvakare inoderedza mutsara nekuwedzera kwekusangana kwemhinduro, uye geles pamhepo tembiricha mushure mekusvika pane imwe pfungwa. Iyo yekuvharidzira yegwenzi yeHPMC yakakwira mukamuri tembiricha.
Kuenderana kunogona zvakare kuchinjirwa nekusarudza sizele size uye kusarudza cellulose ana ana madhigirii akasiyana ekugadziridzwa. Iyo inonzi iyo shanduko ndeyekuisa imwe nhanho yekutsiva kwehydroxylkylks mapoka ezvikamu zveSkeleton yeMC. Nekushandura kukosha kwenhamba yekutsiva kwevanhu vaviri vanopfuura, ndiko kuti, iyo DS kuenderana nekutsiva kweiyo nzira uye hydroxylkyl mapoka atinowanzo taura. Yakasiyana-siyana yekuita zvinodiwa zve cellulose ether inogona kuwanikwa nekuchinja huwandu hwekutsiva kwehuwandu hwevanhu vaviri vevatsidzi.
Kubva kuMufananidzo 4 isu tinogona kuona hukama pakati pekuzvishingisa uye kugadziridzwa. Kuwedzerwa kwe cellulose ether mumifananidzo Iyo yakakwira dosage, iyo yakakura mvura yekudhirowa.
Cellulose ana ana anomererwa mune zvigadzirwa zvekuvakisa zvekuvakisa zvinofanirwa kunyungudutsira nekukurumidza mumvura inotonhora uye upe mukana wakakodzera wegadziriro yehurongwa. Kana ikapihwa imwe shear rate, ichiri kuyerera uye collidal block, iyo iri substandard kana isina kunaka mhando chigadzirwa.
Kune zvakare hukama hwakanaka hwemutsara pakati pehukama hweSEENT SAME uye DOSAGE YEMAHARA ECERULose EHER. Cellulose ether inogona kuwedzera kwazvo vhiza yemota. Iyo yakakura dosage, ndiyo iri pachena mhedzisiro, ona Mufananidzo 6.
Yakakwira-viscosity cellulose ether mhinduro yemvura ine yakakwira thixotropy, iyo zvakare hombe hunhu hwe cellulose ether. Mhedzisiro yemvura yeMC-mhando Polymers kazhinji ine pseudoplastics uye isina-thixotropic fluidity pazasi pavo stepturity tembiricha, Pseudoplasticality inowedzera neyekuwedzera uremu kana kusunganidzwa kwemheremelle ether, zvisinei nerudzi rwetsiva uye degree rekutsiva. Naizvozvo, mheremalose etana emagrosity gracosity giredhi, hpmc, hemc, inogara ichiratidza zvimwe zvinhu zvechitsidzo kwenguva yakareba sekusangana uye tembiricha inogara ichichengetwa nguva dzose. Matura emhando ikagadzirwa kana tembiricha yamutswa, uye zvakanyanya thisiotropic inoyerera inoitika. Yakanyanya kuderera uye yakaderera viscosity cellulose ana anairatidzira thixotropy kunyangwe pazasi pegomba tembiricha. Ichi chivakwa chinobatsira zvikuru kugadzirisa kwekuwedzera uye kusekerera mukuvakwa kwekuvaka moter. Zvinoda kutsanangurwa pano iyo yakakwira viscosity ye cellulose ether, iko zviri nani kuchengetwa kwemvura, asi iyo inoenderana nehukama hwemaCellulose ether, uye inoenderana nekukanganiswa kwayo, iyo ine yakaipa kukonzeresa kusimba kwemotokari uye kuita kwekuvaka. Yakakwira iyo viscosity, iyo iri pachena iyo inoshamisa mhedzisiro pane dhaka, asi haina kuenzana. Vamwe vepakati uye vakaderera viscosity, asi iyo yakagadziridzwa cellulose ether ine zvirinani kuita mukuvandudza simba rerudzi rwerudzi rwemvura. Nekuwedzera kweViscosity, kuchengetwa kwemvura kwemasero ether kunovandudza.
Post Nguva: Kukadzi-18-2023