Ingabe i-hydroxyethyl cellulose i-polymer?

IHydroxYethyl Cellulose (I-HEC) iyi-polymer ngempela. Ukuze sikuqonde ngokugcwele lokhu, kudingeka sihlole imiqondo eyisisekelo yama-polymers, ukwakheka kwe-cellulose kanye nokususwa kwayo, ukuhlanganiswa kanye nezindawo ze-hydroxyethyl cellulose, kanye nezicelo zayo.

1. Imiqondo eyisisekelo yama-polymers

Ama-polymers amakhompiyutha e-macromolecular akhiwa inani elikhulu lamayunithi aphindaphindwayo (abizwa ngokuthi ama-monomers) axhunywe ngamabhondi zamakhemikhali. Lawa ma-monomers akha izakhiwo ezinde ezinamaketanga angemuva kwe-polymerization, enikeza ama-polymers ahlukile ngokomzimba nawamakhemikhali. Ngokusho kwemithombo yabo, ama-polymers angahlukaniswa ngama-polymers wemvelo nama-polymers okwenziwa. Ama-polymers wemvelo afaka i-cellulose, amaprotheni nenjoloba yemvelo; Ama-polthers okwenziwa afaka i-polyethylene, i-polystyrene, ne-polyvinyl chloride.

2. I-cellulose nesakhiwo sayo

I-Cellulose iyingxenye ye-organ polymer eningi kakhulu yemvelo, ikakhulukazi etholakala ezindongeni zeseli zezitshalo. I-Cellulose iyi-polysaccharide ehlanganiswe ama-β-d-glucose amayunithi axhumeke kahle nge-β (1 → 4) amabhondi we-glycosidic, nge-crystallity ephezulu kanye nesakhiwo esitebelekile. Ngenxa yamayunithi ama-glucose aphindaphindwayo, iselula ngokwalo i-polymer yemvelo.

3. Synthesis kanye nokwakheka kwe-hydroxyethyl cellulose

I-Hydroxyyethyl celtulose iyi-cellulose, etholakala ngokungenisa i-hydroxyethyl (-ch₂chroh) ukufaka esikhundleni se-cellulose molecular chain. Ngokukhethekile, i-cellulose iphendula nge-ethyl chloropetate noma isixazululo se-ethyl chloroacetate ngaphansi kwezimo ze-alkali ukukhiqiza i-hydroxyethyl cellulose.

Ngokuhlelekile, i-hydroxyyethyl celturose isagcina isakhiwo esingakanani se-celvule Kodwa-ke, amanye amaqembu e-hydroxyl athathelwa indawo amaqembu we-hydroxyethyl, futhi lokhu kuguqulwa kwenza i-cellubelose ine-soubelity kanye ne-viscosity izici ezihlukile kwalezo ze-cellulose yangempela. Ngaphandle kokwethulwa kwabanye

4. Izakhiwo ze-hydroxyethyl cellulose

Njenge-polymer, i-hydroxyyethyl cellulose inezinye izakhiwo ezijwayelekile ze-polymer ngale ndlela elandelayo:

Isisindo esiphakeme se-molecular: isisindo samangqamuzana se-hydroxyethyl celtulose sivame phakathi kwamakhulu ezinkulungwane kanye nezigidi zama-DAZWOns, okukhombisa izici ezisobala ze-polymer.

Izixazululo: I-Hydroxyyethyl celtule I-viscosity yesixazululo sayo ihlobene nesisindo samangqamuzana kanye nesilinganiso sokufakwa esikhundleni. Le mpahla ibaluleke kakhulu kwizicelo eziningi.

I-Thermosensitivity: I-Viscosity ye-Hydroxyethyl celtulose solution ishintsha ngokushisa, okubonisa i-thermosensitivity, okuyiyona impahla ejwayelekile yezixazululo ze-polymer.

Ukuqina kanye nekhono elenziwe ngefilimu

V. Ukusebenza kwe-Hydroxyethyl celtulose

Ngenxa yezakhiwo zayo ezihlukile ze-polymer, i-hydroxyyethyl cellulose isetshenziswa kabanzi emikhakheni eminingi. Okulandelayo ezinye izinhlelo zokusebenza ezijwayelekile:

Izinto zokwakha: Njengesengezo sokwenza usimende, i-hydroxyyethyl celtule

I-Coatings nopende: Ku-Coatings, i-HEC isetshenziswa njengesikhulu, i-stabilizer kanye ne-ejenti eyakha ifilimu yokuthuthukisa ukunamathela nokubusheleleka kwe-coating.

Adhesives: Izakhiwo zayo ezinhle ezibusayo zikwenza kube yingxenye ebalulekile ekunikezelweni kokunamathela.

Imboni yamaphepha ephaketheni

I-COSMETICS: I-HEC isetshenziswa kabanzi kumafutha, amazinyo nemikhiqizo yokunakekelwa kwesikhumba.

Lezi zinhlelo zokusebenza zisebenzisa amathuba ezakhiwo ze-polymer ze-hydroxyyethyl celtulose, ezinjengokubonakala okuphezulu, izakhiwo ezakha amafilimu nokuqina, ukukhombisa ukusebenza kwayo kanye nokubaluleka njenge-polymer.

I-Hydroxyyethyl celtulose iyi-polymer etholwe ukuguqulwa kwamakhemikhali kwe-cellulose. Isakhiwo saso samangqamuzana siqukethe inani elikhulu lamayunithi we-glucose aphindaphindwayo, asagcina izici zesisindo esiphakeme se-molecular nesakhiwo se-chain ngemuva kokufakwa esikhundleni se-hydroxyethyl. IHydroxYethyl cellulose ibonisa izakhiwo ezijwayelekile ze-polymer ezinjengokubonakala okuphezulu, isixazululo sepulasitiki nekhono elenza ifilimu, futhi lisetshenziswa kabanzi ezinkambeni eziningi zezimboni. Ngakho-ke, kungashiwo ngokucacile ukuthi i-Hydroxyethyl cellulose iyi-polymer ebalulekile.