I-Methyl Hydroxyethyl Cellulose (MHEC) encibilikisiwe ku-mortar emanzi

I-Methyl Hydroxyethyl Cellulose (MHEC)iyi-non-ionic cellulose ether esetshenziswa kabanzi ezintweni zokwakha, ikakhulukazi ku-mortar emanzi, futhi idlala indima ebalulekile. Ukuncibilika kwayo emanzini kanye nesakhiwo sayo sama-molecule amaningi kwenza kube yisisombululo esiqinile emanzini, okunikeza i-mortar izakhiwo ezinhle kakhulu zokucubungula, ukugcinwa kwamanzi kanye nokuzivumelanisa nokwakhiwa.

1. Izakhiwo eziyisisekelo ze-MHEC

I-MHEC iyi-ether derivative ye-cellulose eyenziwe ngokungenisa amaqembu e-methyl kanye ne-hydroxyethyl ku-cellulose yemvelo ngokusebenzisa ukusabela kwe-etherification. Ine-water solubility enhle, izakhiwo zokwakha ifilimu, ukugcinwa kwamanzi kanye nokunamathela. Izinzile ngaphansi kwezimo ezingathathi hlangothi kanye ne-alkaline futhi ihambisana kahle ne-biocompatibility kanye nokuphepha kwemvelo.

I-MHEC iyancibilika emanzini abandayo ekushiseni kwegumbi ukuze yakhe isixazululo se-colloidal esibonakalayo nesikhanyayo, futhi ayincibiliki emanzini ashisayo noma ezinyibilikisini eziningi eziphilayo. Inqubo yayo yokuncibilika iyinqubo yokwanda-ukuhlakazeka-ukuncibilika, futhi ayihileli ukusabela kwamakhemikhali.

2. Inqubo yokuncibilikisa i-MHEC ku-mortar emanzi

Ku-mortar emanzi, i-MHEC ivame ukungezwa engxubeni eyomile ngesimo sempuphu, bese incibilikiswa kancane kancane ngesikhathi senqubo yokwengeza amanzi nokuxuba:

Isigaba sokuqala – ukumuncwa kwamanzi nokuvuvukala: Izinhlayiya ze-MHEC zimunca amanzi futhi zivuvuke ebusweni ngemva kokuthinta amanzi, zakha ungqimba lwejeli.

Isigaba esiphakathi - ukuhlakazeka nokuvuvukala: Ngesenzo sokuxubha, ingxenye yesakhiwo se-colloidal iyabhujiswa, bese i-MHEC iqala ukuhlakazeka ohlelweni lonke.

Isigaba sokugcina – ukuncibilika okuphelele: Ngemva kokuxubha okuqhubekayo kanye nesikhathi esithile, i-MHEC incibilika ngokuphelele ukuze yakhe isixazululo se-polymer esizinzile, esisatshalaliswa ngokulinganayo ku-mortar.

Ezisetshenzisweni ezisebenzayo, izinga lokuncibilika kwe-MHEC lizothinteka ngamandla okuxubha, izinga lokushisa lamanzi, usayizi wezinhlayiya, nezinye izinto ezikule fomula (njengesimende, i-gypsum, isihlabathi, njll.). Ukulawulwa okufanele kwalezi zinhlaka kungagwema inkinga yokuhlangana noma ukuncibilika okungaphelele.

3. Imisebenzi esemqoka ye-MHEC odakeni olumanzi

3.1. Thuthukisa ukugcinwa kwamanzi

Umphumela obaluleke kakhulu we-MHEC ukuthuthukisa kakhulu amandla okugcina amanzi e-mortar, ukunciphisa ukuhwamuka okusheshayo kwamanzi amahhala, ukwandisa isikhathi sokusabela kokumanzisa usimende ngempumelelo, ngaleyo ndlela kuthuthukiswe amandla okubopha kanye namandla, futhi kuvinjelwe ukuqhekeka kusenesikhathi.

3.2. Thuthukisa ukusebenza kokwakha

Ngenxa yokuqina nokuqina kwe-MHEC, uthayela lusebenza kahle, luguquguquka futhi luyasakazeka, kunciphisa ubunzima bokwakhiwa futhi kuthuthukiswe ukusebenza kahle. Ikakhulukazi enkambisweni yokuplasta nokuthayela, lungavimbela ngempumelelo uthayela ukuthi ungawi futhi ushelele.

3.3. Thuthukisa ukusebenza kokubopha

Isakhiwo senethiwekhi ye-colloidal esakhiwe yi-MHEC ku-mortar sithuthukisa amandla okubopha phakathi kwe-mortar kanye nesendlalelo sesisekelo, ikakhulukazi lapho kwakhiwa phezu kobuso obuqondile noma ngaphezulu, okuvimbela i-mortar ukuthi ingawa futhi kuthuthukise ukuthembeka kokwakhiwa.

3.4. Lungisa ukuhambisana kanye nokugeleza

Ngokulungisa inani le-MHEC, ukuhambisana kanye nokuziphatha kwe-rheological kwe-mortar emanzi kungalawulwa, ukuze kube nokugeleza okufanele, okulula ukwakhiwa, futhi ngeke kuthinte umphumela wokubumba ngenxa yokugeleza ngokweqile.

3.5. Thuthukisa ukusebenza okulwa nokushelela

Ezisetshenzisweni ezifana nezinamathiselo zamathayili kanye nezimbobo zokubopha, i-MHEC ingavimbela ngempumelelo ukushelela kwe-mortar, ithuthukise ukuzinza kokwakhiwa, futhi ihlangabezane nezidingo zokwakha zokunamathisela okuqondile kanye namathayili amakhulu.

4. Umphumela womthamo we-MHEC ekusebenzeni kahle kwe-mortar

Inani lokwengeza le-MHEC livame ukulawulwa phakathi kuka-0.1% no-0.5% (ngokusekelwe enanini eliphelele lezinto ezomile). Imiphumela yemithamo ehlukene ekusebenzeni kwe-mortar imi kanje:

Umthamo ophansi (<0.1%): ukugcinwa kwamanzi kuthuthukisiwe kancane, kodwa ukuthuthuka kokusebenza kokwakhiwa akubonakali.

Isilinganiso esimaphakathi (0.2% ~ 0.4%): Ukusebenza okuphelele okungcono kakhulu, ukuthuthukiswa okulinganiselayo kokugcinwa kwamanzi, ukusebenza kokwakhiwa, kanye namandla okubopha.

Ukusetshenziswa ngokweqile (>0.5%): Kungabangela ukuqina ngokweqile kwe-mortar, kunciphise ukugeleza, futhi kwandise isikhathi sokusetha.

Ngakho-ke, ekwakhiweni kwefomula ethile, kuyadingeka ukunquma inani elifanele lokwengeza le-MHEC ngokusebenzisa izivivinyo ukuze kufezwe umphumela wokusetshenziswa ofanele.

5. Ukusebenzisana nezinye izithasiselo

I-MHEC ingasetshenziswa kanye nezinye izithako ezisebenzayo, njenge:

Ngempuphu ye-latex ephinde ihlakazeke (VAE): kuthuthukisa ukuguquguquka kanye namandla okubopha kwe-mortar;

Ngezithibi: nciphisa ukumuncwa kwesimende, sebenzisana ne-MHEC ukuthuthukisa ifasitela lokwakha;

Ngama-filler/ama-aggregate amaminerali: hlanganisa ukugeleza kanye nokuthuthukiswa kwamandla, uzinzise isakhiwo se-mortar.

Njengesengezo esibalulekile esisebenzayo ku-mortar emanzi,i-hydroxyethyl methylcellulose (MHEC) idlala indima eminingi ekuqineni, ukugcinwa kwamanzi, ukuthuthukiswa kanye nokuthuthukiswa kokwakhiwa ohlelweni lwe-mortar ngokusebenzisa izakhiwo zalo ezinhle ezincibilika emanzini. Kuyisithasiselo esibaluleke kakhulu esisebenza kahle ezintweni zokwakha zesimanje. Ngokukhetha amamodeli nezilinganiso ngokwesayensi, i-MHEC ingathuthukisa ngempumelelo ukusebenza okuphelele kwe-mortar, ihlangabezane nezidingo zezimo ezahlukene zokwakha, futhi isize ukwakhiwa okuluhlaza nokusebenza kahle.