I-HPMC isiza kanjani ukuthuthukisa ukusebenza kodaka nodaka

I-Hydroxypropyl Methylcellulose (HPMC) yi-ether engeyona eye-cellulose esetshenziswa kakhulu ezintweni zokwakha, ikakhulukazi udaka nodaka. Njengesengezo, i-HPMC ingathuthukisa kakhulu izakhiwo ezahlukahlukene zalezi zinto, kufaka phakathi umsebenzi, ukugcinwa kwamanzi, ukumelana nokuqhekeka, njll.

1. Izakhiwo zamakhemikhali kanye nokwakheka kwe-HPMC

I-HPMC iyi-polymer ye-semi-zokwenziwa etholwe ngokushintsha amaqembu we-hydroxy we-cellulose ngokusebenzisa i-methylation kanye ne-hydroxypropylation. Iyunithi yalo eyisisekelo yesakhiwo yi-glucose, exhunywe ngamabhondi ama-β-1,4-glycosidic. Iketanga elide le-cellulose lilinikeza izakhiwo ezinhle ezinamafilimu nezinamathela, ngenkathi ukwethulwa kwamaqembu we-methyl kanye ne-hydroxypropyll kuthuthukisa ukuqina kwalo nokuqina kwalo.

Isakhiwo samakhemikhali se-HPMC siyinikeza izici ezilandelayo:

I-Solubinity yamanzi: Ingancibilika ngokushesha emanzini abandayo ukwakha uketshezi olusobala lwe-viscous.

Ukulungiswa kwe-Viscosity: Isixazululo se-HPMC sinokuvunywa okuguqukayo, okuncike ngesisindo salo molecular kanye okuhlushwa.

Ukuqina: Kuzinzile kuma-acid nasezisekelweni futhi kungagcina ukusebenza kwayo ngaphezu kobubanzi be-PH.

2. Izindlela ze-HPMC ukwenza ngcono ukusebenza ngodaka nodaka

(2.1). Thuthukisa ukugcinwa kwamanzi
Ukugcinwa kwamanzi kubhekisele emandleni odaka noma udaka ukugcina amanzi, okubalulekile kwi-hydration yesisindo nenqubo yokuqina. I-HPMC ithuthukisa ukugcinwa kwamanzi ngezinqubo ezilandelayo:

Umphumela owakhayo ngefilimu: I-HPMC yakha ifilimu elincanyana ngodaka noma ngodaka, yehlisa izinga lamanzi okuhwamuka.
Ukutholwa kwamanzi kwamangqamuzana: Ama-molecule we-HPMC angadonsa inani elikhulu lamanzi, anciphise ukulahleka kwamanzi ngesikhathi sokwakha.
Ukugcinwa kwamanzi okuphezulu kusiza ekusebenzeni kahle kwesimende, ngaleyo ndlela kuthuthukise amandla nezibopho zokubopha ngodaka nodaka. Ngaphezu kwalokho, futhi kunciphisa ukwakheka kwemifantu okubangelwa ukulahleka kwamanzi ngokweqile.

(2.2). Thuthukisa ukusebenza
Ukusebenza kubhekisele ekusebenzeni okusebenzayo kodaka nodaka ngesikhathi sokwakha, njengokusebenzisa ubisinkulu nokusebenza. Izindlela zokuthi i-HPMC ithuthukisa umsebenzi ifaka phakathi:

Ukuthuthukisa i-Plasticity: I-HPMC ihlinzeka ngokuthathela okuhle, okunikeza inhlanganisela kangcono ngeplastiki nobubi.
Ukuvimbela Ukuhlehlisa Nokuhlukaniswa: Umphumela wokuqina we-HPMC usiza ukugcina ukusatshalaliswa kwezinhlayiya, ukuvikela ukunxusa noma ukuhlukaniswa ngodaka noma ngodaka.
Lokhu kwenza udaka noma udaka lula ukusebenzisana nalo ngesikhathi sokwakha, okuvumela ukwenziwa kwesicelo nokubumbana, ukunciphisa amathuba okuchitha nokusebenza kabusha.

(2.3). Ukukhuphuka kokungafani kokuqhekeka
Udaka nodaka lungaqhekeka ngenxa yokushiswa kwevolumu ngesikhathi sokuqina, futhi i-HPMC isiza ukunciphisa le nto:

Ukuzivumelanisa nezimo
Ukomisa okufanayo: ngoba i-HPMC ihlinzeka ngokugcinwa kahle kwamanzi, amanzi angakhishwa ngokulinganayo, anciphise ushintsho lwevolumu ngesikhathi sokomiswa.
Lezi zakhiwo zehlisa amathuba okuba ukwakheka kokuqhekeka futhi athuthukise ukuqina kwezinto.

I-3. Izibonelo zezinhlelo ze-HPMC ngodaka nodaka

(3.1). Tile anamathela
Ku-Tile Adhesive, i-HPMC ihlinzeka ngokugcinwa kwamanzi okuhle kanye ne-anti-slip Properties, okuvumela amathayili ukunamathela ngokuqinile ku-substrate futhi alondoloze ukusebenza okuhle kokwakhiwa.

(3.2). Udaka lokuzimela
Udaka lokuzilibazisa ludinga ukufutheka okuphezulu kanye nezakhiwo ezizimele. Ukugcinwa kwamanzi okuphezulu kwe-HPMC kanye nokulungiswa kwamandla okulungiswa kwe-viscosity kusiza ukufeza lezi zidingo, okuholele endaweni ebushelelezi.

(3.3). Ukhonkolo
I-HPMC inyusa ukunamathela nokumelana nokuqhekeka kodaka, ikakhulukazi ezihlelweni zokufaka odongeni olungaphandle, futhi zingamelana nokuqhekeka nokuwa okubangelwa yizici ezahlukahlukene zezemvelo.

4. Ukuqapha kokusetshenziswa kwe-HPMC

(4.1). Umsebenzi
Inani le-HPMC elisetshenzisiwe ngodaka nodaka imvamisa inani elincane ngokuya ngamaphesenti wesisindo, njenge-0,1% kuye ku-0.5%. I-HPMC eningi kakhulu izophumela ekuboneni ngokweqile futhi ithinta ukuwenza; Kuncane kakhulu kuzokwenza kube nzima ukuthuthukisa ukusebenza kahle ukusebenza.

(4.2). Ukuhambisana nezinye izengezo
Lapho usebenzisa i-HPMC, kuyadingeka ukuthi ucabangele ukuhambisana nezinye izengezo zamakhemikhali (ezifana namanzi anciphisayo, ama-ejenti okufaka umoya, njll.) Ukuqinisekisa ukuthi akukho mpilo yamakhemikhali embi kakhulu noma ukusebenza kokugcina okusebenzayo.

Njengesengezo esibalulekile samakhemikhali, ukusetshenziswa kwe-HPMC ngodaka nodaka luthuthukisa kakhulu ukugcinwa kwalo kwamanzi, ukusebenziseka kanye nokuphikiswa kwe-crack. Lokhu kuthuthukiswa akugcini nje ngokuthuthukisa umphumela wokwakha kanye nekhwalithi yezinto ezibonakalayo, kodwa futhi kuthuthukisa ukuqina nokwethembeka kwephrojekthi. Kuzinhlelo ezithile, ngokushintsha umthamo kanye nesilinganiso se-HPMC, ukusebenza ngodaka nodaka kungalungiswa kahle.