I-Hydroxypropyl methylcellulose (HPMC) yi-ether ye-cellulose eguquguqukayo esetyenziswa ngokubanzi kushishino lokwakha, ngakumbi kwimixube yodaka oluxubeneyo. Iimpawu zayo ezizodwa ziphucula ukusebenza kunye nokuphathwa kodaka, zinegalelo elikhulu ekusebenzeni kwazo.
Ulwakhiwo lweMichiza kunye neNdibaniselwano
I-HPMC ithathwe kwi-cellulose, i-polymer yendalo efumaneka kwiindonga zeseli zezityalo. Ihlanganiswe nge-etherification ye-cellulose kunye ne-methyl chloride kunye ne-propylene oxide. Le nkqubo ithatha indawo yamaqela e-hydroxyl kwi-molecule ye-cellulose kunye ne-methoxy (-OCH₃) kunye ne-hydroxypropyl (-OCH₂CH (OH)CH₃) amaqela. Iqondo lokutshintshwa kunye nomlinganiselo we-methoxy kumaqela e-hydroxypropyl imisela iimpawu ezithile ze-HPMC, ezifana nokunyibilika, i-viscosity, kunye ne-thermal gelation.
Iipropati ze-HPMC kwi-Dry-Mix Mortar
1. Ukugcinwa kwamanzi
I-HPMC isebenza kakhulu ekugcineni amanzi kumxube wodaka. Le propati yogcino lwamanzi ibalulekile kuba iqinisekisa ukugalela kwamanzi ngendlela eyiyo kwesamente, iphucula inkqubo yokunyanga. Ukugcinwa kwamanzi okuphuculweyo kukhokelela ekusebenzeni kakuhle kunye nexesha elide lokuvula, ukunciphisa umngcipheko wokumisa kwangaphambi kwexesha, oku kunokubangela ukuncipha kunye nokuqhekeka. Ukongezelela, iqinisekisa ukunikezelwa kwamanzi okuhambelanayo kwi-cement hydration, ukuphucula iimpawu zomatshini kunye namandla omdaka.
2. Ukuguqulwa kweRheology
I-HPMC iguqula ngokuphawulekayo i-rheology yodaka lomxube owomileyo. Isebenza njenge-thickener, inyusa i-viscosity yomxube wodaka. Le propati ibalulekile ekulawuleni ukuhamba kunye nokusasazeka kodaka, okwenza kube lula ukuyifaka kwiindawo ezithe nkqo ngaphandle kokugubha. Kwakhona kunceda ekufezekiseni iileya ezigudileyo kunye nezifanayo ngexesha lokusetyenziswa, ukuqinisekisa ukunamathela okungcono kunye nokubambisana. Ukuguqulwa kwe-Rheological yi-HPMC kuphucula ukuphathwa ngokubanzi kunye neempawu zokusetyenziswa kodaka.
3. Ukuphuculwa kokuncamathela
I-HPMC yongeza iimpawu zokuncamathelisa zodaka olomileyo. Iphucula amandla ebhondi phakathi kodaka kunye nee substrates ezahlukeneyo ezifana nezitena, ikhonkrithi, kunye neethayile. Oku kubaluleke kakhulu kwizicelo ezifana nokunamathiswa kweethayile kunye neenkqubo zangaphandle zokugquma i-thermal. Ukubambelela okuphuculweyo kunciphisa amathuba okuba i-delamination kwaye iqinisekise ukuqina kwexesha elide lodaka olusetyenzisiweyo.
4. Ukusebenza kunye nokungaguquguquki
Olunye uncedo oluphambili lwe-HPMC kukuphuculwa kokusebenza kunye nokungaguquguquki kodaka lomxube owomileyo. Ivumela ukuxuba okulula kunye nesicelo esigudileyo, ukubonelela nge-creamy texture elula ukusasazeka kunye nokumila. Ukusebenza okuphuculweyo kunciphisa umgudu ofunekayo ngexesha lokufaka isicelo, okwenza inkqubo isebenze ngakumbi kwaye ingabinzima kakhulu emsebenzini. Ikwaqinisekisa ukuhanjiswa okufanayo ngakumbi kodaka, okukhokelela ekugqityweni komgangatho ongcono.
5. I-Thermal Gelation
I-HPMC ibonisa iimpawu ze-thermal gelation, oku kuthetha ukuba yenza ijeli xa ishushu. Le propati inenzuzo kwizicelo apho ukuxhathisa ukushisa kuyadingeka. Ngethuba lokusetyenziswa komdaka, ubushushu obuveliswayo bunokubangela ukunyuka kwesikhashana kwi-viscosity, enceda ekugcineni imilo kunye nokuzinza kodaka olusetyenzisiweyo. Emva kokuba iqondo lokushisa liyehla, ijeli ibuyela kwimeko yayo yangaphambili, ivumela ukuqhubeka nokusebenza.
6. Ukungena emoyeni
I-HPMC inokwazisa kwaye izinzise amaqamza omoya amancinci ngaphakathi komxube wodaka. Oku kunyanzeliswa komoya kuphucula ukuxhathisa kwe-frize-thaw yodaka ngokubonelela indawo yeekristale ze-ice ukwandisa, ukunciphisa uxinzelelo lwangaphakathi kunye nokuthintela umonakalo. Ukongezelela, umoya owenziweyo uphucula ukusebenza kunye nokumpompa komdaka, okwenza kube lula ukusetyenziswa kwiimeko ezahlukeneyo.
7. Ukuhambelana nezinye izongezo
I-HPMC iyahambelana noluhlu olubanzi lwezinye izongezo ezidla ngokusetyenziswa kwiidaka zomxube owomileyo, ezifana ne-superplasticizers, i-retarders, kunye ne-accelerators. Oku kuhambelana kuvumela ukuqulunqwa kwemixube yodaka olulungiselelwe ukuhlangabezana neemfuno ezithile zokusebenza. Umzekelo, i-HPMC inokusebenza ngokubambisana kunye ne-superplasticizers ukuphucula ukuhamba kakuhle ngelixa igcina i-viscosity efunekayo.
8. Ukwenziwa kweFilimu
I-HPMC yenza ifilim ebhityileyo, ebhetyebhetye xa yomiswe, enegalelo kwiimpawu zomphezulu wodaka. Olu qulunqo lwefilimu lunceda ekulawuleni ukuphuphuma kwamanzi kunye nokwandisa amandla omhlaba kunye nokuqina kodaka. Ikwabonelela ngoluhlu olukhuselayo olunokuphucula ukuchasana kwemozulu kunye nokuxhatshazwa kwe-abrasion yodaka olusetyenzisiweyo.
9. Ukunyangwa kokusingqongileyo
I-HPMC inika ukuchasana nezinto ezahlukeneyo zokusingqongileyo, kubandakanya ukufuma, ukuguquguquka kobushushu, kunye nokuvezwa kweekhemikhali. Oku kuxhathisa kubalulekile ekomeleleni nasekuphileni ixesha elide kodaka oluxubeneyo owomileyo, ngakumbi kwiimeko ezinzima okanye eziguquguqukayo zokusingqongileyo. Inceda ekugcineni ukusebenza kunye nokubonakala kwexesha elongezelelweyo lodaka, ukunciphisa imfuno yokugcinwa rhoqo okanye ukulungiswa.
10. Umthamo kunye nesicelo
I-dosage ye-HPMC kwi-dry-mix mortars ngokuqhelekileyo isuka kwi-0.1% ukuya kwi-0.5% ngobunzima bomxube owomileyo. Umlinganiselo othile uxhomekeke kwiipropati ezifunwayo kunye nohlobo lwesicelo. Ngokomzekelo, iidosi eziphezulu zinokusetyenziswa kwii-adhesives ze-tile ukuphucula ukubambelela kunye nokusebenza, ngelixa i-dosages ephantsi inokwanela udaka lwenjongo jikelele. Ukufakwa kwe-HPMC kumxube owomileyo kuthe tye, kwaye kunokusasazwa ngokulula ngexesha lenkqubo yokuxuba.
I-HPMC licandelo eliyimfuneko kwimibhobho yomxube owomileyo ngenxa yeepropati zayo ezininzi. Ukukwazi kwayo ukugcina amanzi, ukuguqula i-rheology, ukuphucula ukunamathela, ukuphucula ukusebenza, kunye nokubonelela ukuchasana kokusingqongileyo kuyenza ibe yongezelelo oluxabisekileyo kwizicelo ezahlukeneyo zokwakha. Ngokuqonda kunye nokuxhasa iipropathi ezisisiseko ze-HPMC, abaqulunqi befomula banokudala ukusebenza okuphezulu komxube owomileyo wodaka oluhlangabezana neemfuno ezahlukeneyo zeendlela zolwakhiwo lwangoku.
Ixesha lokuposa: Jun-14-2024