Iwo ma hydroxyl mapoka aricellulose ethermamorekuru uye maatomu eokisijeni pazvisungo zveether zvichaumba hydrogen zvisungo nemamorekuru emvura, kushandura mvura yakasununguka kuva mvura yakasungwa, nokudaro ichiita basa rakanaka mukuchengetedza mvura; kuwirirana pakati pemamorekuru emvura uye cellulose ether molecular cheni inobvumira mamorekuru emvura kuti apinde mukati me cellulose ether macromolecular chain uye ave pasi pezvipingamupinyi zvakasimba, nokudaro achigadzira mvura yakasununguka uye mvura yakasungirirwa, iyo inovandudza kuchengetwa kwemvura ye simenti slurry; cellulose ether inovandudza rheological properties, porous network structure uye osmotic pressure ye fresh simende slurry kana iyo film-forming properties ye cellulose ether inotadzisa kupararira kwemvura.
Kuchengetwa kwemvura kwe cellulose ether pachayo kunobva mukunyungudika uye kupera simba kweselulosi ether pachayo. Huwandu hwe hydration hwemapoka ehydroxyl chete hauna kukwana kubhadhara mabhondi ehydrogen akasimba uye van der Waals masimba pakati pemamorekuru, saka inongozvimba asi hainyungudika mumvura. Kana zvinotsiva zvinounzwa mucheni yemamorekuru, kwete chete izvo zvinotsiva zvinoparadza macheni ehydrogen, asiwo iyo interchain hydrogen zvisungo zvinoparadzwa nekuda kwekuroora kwevanotsiva pakati pemaketani ari padyo. Iyo yakakura iyo inotsiva, yakakura chinhambwe pakati pemamorekuru, uye yakakura mhedzisiro yekuparadza hydrogen zvisungo. Mushure mekunge cellulose lattice inoputika, mhinduro inopinda, uye cellulose ether inonyungudika nemvura, ichiita sarudzo yepamusoro-viscosity, iyo inobva yaita basa rekuchengetedza mvura.
Zvinhu zvinokanganisa mashandiro ekuchengetedza mvura:
Viscosity: Iyo yakakura viscosity ye cellulose ether, zvirinani kuchengetedza kwemvura kuita, asi iyo yakakwira viscosity, iyo inokwira yakaenzana molecular uremu hwe cellulose ether, uye kunyungudika kwayo kunodzikira zvinoenderana, izvo zvine kukanganisa kwakashata pakudzika uye kuita kwekuvaka. yedhaka. Kazhinji, kune chigadzirwa chimwe chete, mhedzisiro yeviscosity yakayerwa nenzira dzakasiyana zvakasiyana, saka kana uchienzanisa viscosity, inofanirwa kuitwa pakati peiyo nzira dzekuyedza (kusanganisira tembiricha, rotor, nezvimwewo).
Kuwedzera huwandu: Kuwanda kwehuwandu hweselulosi ether inowedzerwa mudhaka, zviri nani kuchengetedza mvura kuita. Kazhinji, shoma shoma ye cellulose ether inogona kuvandudza zvakanyanya mwero wekuchengetedza mvura yedhaka. Kana huwandu hwasvika kune imwe nhanho, maitiro ekuwedzera ekuchengetedza mvura anononoka.
Particle fineness: Kana zvimedu zvakanyanyisa, zvinoita kuti mvura irambe iri nani. Kana zvimedu zvihombe zve cellulose ether zvasangana nemvura, pamusoro pacho panobva panyungudika uye kuita gel rekuputira zvinhu kudzivirira mamorekuru emvura kuti asarambe achipinda. Dzimwe nguva, kunyangwe kwenguva refu kubvongodza hakugone kuparadzira yunifomu uye kunyungudika, kugadzira turbid flocculent mhinduro kana agglomeration, iyo inokanganisa zvakanyanya kuchengetwa kwemvura kweselulosi ether. Solubility chimwe chezvinhu zvekusarudza cellulose ether. Fineness zvakare yakakosha kuita chiratidzo chemethyl cellulose ether. Fineness inokanganisa kunyungudika kwemethyl cellulose ether. Coarser MC inowanzoita granular uye inogona kunyungudika zviri nyore mumvura isina agglomeration, asi mwero wekunyunguduka unononoka uye hauna kukodzera kushandiswa mudhaka rakaoma.
Tembiricha: Sezvo tembiricha yakadzikama ichikwira, kuchengetwa kwemvura kwe cellulose ethers kunowanzo kuderera, asi mamwe akagadziridzwa cellulose ethers anewo kuchengetwa kwemvura kwakanaka pasi pemamiriro ekushisa kwepamusoro; kana kutonhora kuchikwira, hydration yemapolymers inopera simba, uye mvura pakati pemaketani inodzingwa. Kana kupera kwemvura kuchikwana, mamorekuru anotanga kuungana kuti aite matatu-dimensional network gel.
Molecular structure: Cellulose ethers ine yakaderera inotsiva ine nani kuchengetedza mvura.
Kukora uye thixotropy
Kukora:
Mhedzisiro pakugona kwekubatanidza uye mashandiro e-anti-sagging: Cellulose ethers inopa yakanyorova dhaka yakanakisa viscosity, iyo inogona kuwedzera zvakanyanya kugona kwekubatanidza kwedhaka rakanyorova nehwaro layer uye kugadzirisa iyo anti-sagging kuita kwedhaka. Inoshandiswa zvakanyanya mukupurasita dhaka, tile yekubatanidza dhaka uye yekunze madziro ekudzivirira system 3.
Mhedzisiro pane homogeneity yezvinhu: Iko kukora mhedzisiro ye cellulose ethers inogona zvakare kuwedzera anti-kupararira kugona uye homogeneity yezvichangobva kusanganiswa zvinhu, kudzivirira stratization yemidziyo, kupatsanurwa uye kubuda kwemvura, uye inogona kushandiswa mufiber kongiri, pasi pemvura kongiri uye inozvigadzirisa kongiri. .
Kwakabva uye simba rekukora mhedzisiro: Iko kukobvu kweselulosi ether pane-simende zvinhu zvinobva kune viscosity ye cellulose ether solution. Pasi pemamiriro akafanana, kukwirisa viscosity ye cellulose ether, zviri nani kupenya kwezvakagadziridzwa sement-based materials, asi kana viscosity yakanyanya kuwanda, zvinokanganisa kuyerera uye kushanda kwechinhu (sekunamatira kubanga rekupurasita. ) Kuzvimisa-leveling dhaka uye yekuzvigadzirisa kongiri ine yakakwira fluidity zvinodiwa zvinoda yakaderera viscosity ye cellulose ether. Uye zvakare, iyo thickening mhedzisiro ye cellulose ether inowedzerawo kudiwa kwemvura yesimende-yakavakirwa zvinhu uye kuwedzera kubuda kwedhaka.
Thixotropy:
High-viscosity cellulose ether aqueous solution ine high thixotropy, iyo iriwo hunhu hukuru hwe cellulose ether. Iyo aqueous solution yemethyl cellulose kazhinji ine pseudoplasticity uye isiri-thixotropic fluidity pazasi petembiricha yegel, asi inoratidza Newtonian inoyerera zvivakwa pazasi shear mitengo. Pseudoplasticity inowedzera nekuwedzera kwe cellulose ether molecular weight kana concentration, uye haina chekuita nerudzi rwekutsiva uye dhigirii rekutsiva. Naizvozvo, cellulose ethers yegiredhi rimwechete viscosity, ingave MC, HPMC, kana HEMC, inogara ichiratidza zvakafanana rheological properties chero bedzi iyo yekuisa uye tembiricha inoramba iripo. Kana kutonhora kuchikwira, gel rekugadzirisa rinoumbwa, uye kuyerera kwepamusoro thixotropic kunoitika. Cellulose ethers ine high concentration uye low viscosity inoratidza thixotropy kunyange pasi pekushisa kwegel. Ichi chivakwa chinobatsira kwazvo kugadzirisa kuenzana uye kusaga kwedhaka rekuvaka panguva yekuvaka.
Kupinza mweya
Nheyo uye mhedzisiro pakushanda kwekushanda: Cellulose ether ine yakakosha kupinza mhepo mhedzisiro pane nyowani simende-yakavakirwa zvinhu. Cellulose ether ine ese ari maviri hydrophilic mapoka (hydroxyl mapoka, ether mapoka) uye hydrophobic mapoka (methyl groups, glucose mhete). Iyo i surfactant ine chiitiko chepamusoro, nekudaro ine mhepo inopinza mhedzisiro. Mhepo inopinza mhepo inoburitsa bhora rekuita, iro rinogona kuvandudza kushanda kwezvinhu zvitsva zvakasanganiswa, sekuwedzera mapurasitiki uye kutsetseka kwedhaka panguva yekushanda, iyo inobatsira pakupararira kwedhaka; ichawedzerawo kubuda kwedhaka uye kuderedza mutengo wekugadzira dhaka.
Mhedzisiro pane zvemagetsi zvivakwa: Iyo mhepo inopinza mhedzisiro inozowedzera porosity yezvinhu zvakaomeswa uye kuderedza michina yayo senge simba uye elastic modulus.
Mhedzisiro pamvura inoyerera: Seye surfactant, cellulose ether ine zvakare yekunyorova kana yekuzora pazvimedu zvesimende, izvo pamwe chete nemhepo inopinza mhedzisiro inowedzera fluidity yesimende-yakavakirwa zvinhu, asi kukora kwayo kunoderedza fluidity. Mhedzisiro ye cellulose ether pane fluidity ye simende-yakavakirwa zvinhu musanganiswa weplasticizing uye thickening mhedzisiro. Kazhinji kutaura, kana iyo cellulose ether dosage yakanyanya kuderera, inonyanya kuratidza seplasticizing kana mvura inoderedza mhedzisiro; kana iyo dosi yakakwira, iyo thickening mhedzisiro ye cellulose ether inowedzera nekukurumidza, uye iyo mhepo inopinda mumhepo inoita kunge yakazara, saka inotaridza sekukora kana kuwedzera kudiwa kwemvura.
Nguva yekutumira: Zvita-23-2024