Udaka ngumxube wesamente, isanti kunye namanzi asetyenziswa kushishino lolwakhiwo kwizicelo ezahlukeneyo ezifana nokwakha, ukutyabeka kunye nokulungisa iithayile. Umgangatho wodaka ubaluleke kakhulu ekomeleleni nasekuqineni kwesakhiwo. Umxholo womoya wodaka udlala indima enkulu ekusebenzeni kodaka. Ubukho bamaqamza omoya kumdaka buphucula ukusebenza kwawo, kunciphisa ukuncipha kunye nokuqhekeka, kwaye kwandisa iipropati zayo zokugquma i-thermal. I-cellulose ethers, efana ne-hydroxypropylmethylcellulose (HPMC) kunye ne-methylhydroxyethylcellulose (MHEC), isetyenziswa ngokubanzi kwishishini lokwakha njengezongezo zokuphucula umgangatho kunye nokusebenza kwezidumbu. Eli nqaku lixubusha umphumo we-cellulose ethers kumxholo womoya wodaka.
Impembelelo ye-cellulose ether kumxholo womoya wodaka:
Umxholo womoya wodaka uxhomekeke kwizinto ezahlukeneyo ezifana nomlinganiselo wesamente yamanzi, umlinganiselo wesanti-samente, ixesha lokuxuba, kunye nendlela yokuxuba. Ukongezwa kwe-cellulose ethers kwi-mortar kunokuchaphazela kakhulu umxholo womoya. I-HPMC kunye ne-MHEC zi-polymers ze-hydrophilic ezinokufunxa amanzi kwaye zisasazeke ngokulinganayo kumxube wodaka. Basebenza njengabanciphisi bamanzi kwaye baphucula ukusebenza kodaka. Ukongeza i-cellulose ethers kumxube wodaka kunciphisa umthamo wamanzi afunekayo ukufezekisa ukuhambelana okufunwayo, ngaloo ndlela kuncitshiswe umxholo womoya wodaka.
Nangona kunjalo, impembelelo ye-cellulose ethers kumxholo womoya we-mortars ayisoloko imbi. Oku kuxhomekeke kumthamo kunye nodidi lwe-cellulose ether esetyenziswayo. Xa isetyenziswe kwisixa esichanekileyo, i-cellulose ethers inokunyusa umxholo womoya womdaka ngokwandisa ukuzinza nokunciphisa ukuhlukana. I-cellulose ether isebenza njenge-stabilizer, enokuthintela ngokufanelekileyo ukuwa kweepores ngexesha lokumisela kunye nokuqina komdaka. Oku kwandisa ukuqina kunye namandla odaka.
Enye into echaphazela umxholo womoya womdaka yindlela efanelekileyo yokuxuba. Ukuxuba okomileyo kwe-ether ye-cellulose equkethe i-mortars akukhuthazwa njengoko kuya kukhokelela kwi-agglomeration ye-cellulose ether particles kunye nokwakhiwa kwamaqhuma kumdaka. Ukuxuba okumanzi kunconywa njengoko kuqinisekisa ukusasazeka kwe-homogeneous ye-cellulose ether kumxube wodaka kunye nokuphucula ukusebenza kwayo.
Iingenelo zokusebenzisa i-cellulose ether kudaka:
I-cellulose ethers ezifana ne-HPMC kunye ne-MHEC zibonelela ngeenzuzo ezininzi xa zisetyenziselwa udaka. Baphucula ukusebenza kunye nokunamathela kodaka, banciphise umlinganiselo wesamente yamanzi kunye nokwandisa ukuhambelana kodaka. Baphucula ukuqina, amandla kunye nokunwebeka kodaka. I-cellulose ethers isebenza njenge-thickeners kunye ne-stabilizers kwaye inqande ukuwa kwamaqamza omoya ngexesha lokumisela kunye nokuqina kodaka. Oku kwandisa ukumelana nokunyibilika komkhenkce, kunciphisa ukushwabana kunye nokuphucula ukuxhathisa kokuqhekeka. I-ether ye-cellulose nayo ineempawu ezilungileyo zokugcina amanzi, ngaloo ndlela iphucula ukunyangwa kunye nokuhanjiswa kodaka.
Ukushwankathela, i-HPMC, i-MHEC kunye nezinye i-cellulose ethers zisetyenziswa ngokubanzi njengezongezo kwishishini lokwakha ukuphucula umgangatho kunye nokusebenza kodaka. Umxholo womoya wodaka yinto ebalulekileyo echaphazela ukusebenza kwayo, kwaye ukongezwa kwe-cellulose ether kunokuchaphazela kakhulu umxholo womoya wodaka. Nangona kunjalo, impembelelo ye-cellulose ethers kumxholo womoya we-mortars ayisoloko imbi. I-cellulose ethers inokunyusa umxholo womoya wodaka kwaye iphucule ukusebenza kwayo ukuba isetyenziswe kwisixa esichanekileyo kunye neendlela ezifanelekileyo zokuxuba. Iingenelo zokusebenzisa i-cellulose ethers kwi-mortar ziquka ukuphuculwa kokusebenza, ukunamathela, ukuhambelana, ukuqina, amandla kunye nokuqina komdaka, kunye nokunciphisa ukuncipha kunye nokuphucula ukuxhathisa kokuqhekeka.
Ixesha lokuposa: Aug-22-2023