Isibonelo se-cellulose ether

I-cellulose etherisibonelo inhlanganisela ye-polymer eyenziwe nge-cellulose enesakhiwo se-ether. Indandatho ngayinye ye-glucose ku-macromolecule ye-cellulose iqukethe amaqembu amathathu e-hydroxyl, iqembu eliyinhloko le-hydroxyl ku-athomu ye-carbon yesithupha, neqembu le-hydroxyl lesibili kuma-athomu ekhabhoni lesibili nelesithathu. I-hydrogen eseqenjini le-hydroxyl ithathelwa indawo yiqembu le-hydrocarbon ukuze lenze i-cellulose. Kungumkhiqizo wokufakwa esikhundleni kwe-hydroxyl hydrogen ngeqembu le-hydrocarbon ku-cellulose polymer. I-Cellulose iyinhlanganisela ye-polyhydroxy polymer engancibiliki noma incibilike. I-Cellulose ingancibilika emanzini, ixube isixazululo se-alkali kanye ne-organic solvent ngemva kwe-etherification, futhi inezici ze-thermoplastic.

I-Cellulose ether igama elivamile lochungechunge lwemikhiqizo ekhiqizwa ukusabela kwe-alkali cellulose kanye ne-etherifying agent ngaphansi kwezimo ezithile. I-alkali cellulose ithathelwa indawo ama-etherifying ahlukene ukuze kutholwe ama-cellulose ether ahlukene.

Ngokwezakhiwo ze-ionization zama-substituents, isibonelo se-cellulose ethers singahlukaniswa sibe yi-ionic (efana ne-carboxymethyl cellulose) kanye ne-non-ionic (njenge-methyl cellulose) izigaba ezimbili.

Ngokohlobo lokushintshwa,i-cellulose ethersisibonelo singahlukaniswa sibe yi-ether eyodwa (njenge-methyl cellulose) ne-ether exutshwe (njenge-hydroxypropyl methyl cellulose). Ngokuvumelana ne-solubility, ingahlukaniswa ibe yi-soluble yamanzi (njenge-hydroxyethyl cellulose) kanye ne-organic solvent solubility (njenge-ethyl cellulose). Udaka oluxubile olomile lusebenzisa ikakhulukazi i-cellulose encibilika emanzini, engahlukaniswa ibe uhlobo oluncibilika ngokushesha kanye nohlobo lokuncibilika olubambezelekile ngemva kokwelashwa kwendawo.

Ama-Admixtures adlala indima ebalulekile ekuthuthukiseni izakhiwo zodaka oluxutshwe okomile futhi abangele ngaphezu kwama-40% wezindleko zempahla odakeni oluxutshwe okomile. Ingxenye enkulu yengxube emakethe yasekhaya ihlinzekwa ngabakhiqizi bangaphandle, futhi umthamo owunkomba womkhiqizo unikezwa abahlinzeki. Ngenxa yalokho, izindleko zemikhiqizo yodaka oluxutshwe okomile zihlala ziphezulu, futhi kunzima ukwazisa udaka oluvamile lwamatshe kanye nodaka lokuplasta ngobuningi nendawo ebanzi. Imikhiqizo yezimakethe ezisezingeni eliphezulu ilawulwa izinkampani zakwamanye amazwe, abakhiqizi bakadaka olomile banenzuzo ephansi, ukungakwazi ukuthengeka kwamanani aphansi; Ukusetshenziswa kwe-admixture akunalo ucwaningo oluhlelekile noluqondisiwe, landela ukwakheka kwangaphandle ngobumpumputhe.

I-ejenti yokugcina amanzi iyinhlanganisela eyinhloko yokuthuthukisa ukusebenza kokugcinwa kwamanzi kodaka olomile oluxubile futhi ingenye yezixube ezibalulekile ukuze kutholwe izindleko ezibonakalayo zodaka olomile oluxubile. Umsebenzi oyinhloko we-cellulose ether ukugcina amanzi.

Indlela yokusebenza ye-cellulose ether odakeni imi kanje:

(1) udaka ku-cellulose ether encibilikisiwe emanzini, ngoba indima esebenzayo yokuqinisekisa ukuthi izinto ezigeliweyo zisatshalaliswa ngendlela efanayo ohlelweni, kanye ne-cellulose ether njengohlobo lwe-colloid evikelayo, "iphakheji" izinhlayiya eziqinile, futhi endaweni yayo yangaphandle ukuze kwakhiwe ungqimba lwefilimu yokugcoba, uhlelo lwe-slurry luzinze kakhudlwana, futhi futhi luthuthukisa uketshezi lwenqubo yokwakhiwa kwe-lubrication. kanjalo.

(2)I-cellulose etherIsixazululo ngenxa yezimpawu zayo zesakhiwo samangqamuzana, ukuze amanzi odaka akulula ukulahlekelwa, futhi kancane kancane akhishwe esikhathini eside, enikeza udaka nokugcinwa kwamanzi okuhle nokusebenza kahle.