I-cellulose ethers luhlobo lwekhompawundi yepolymer enyibilikayo emanzini eyenziwe emva kokuguqulwa kweekhemikhali zeselulosi. Zisetyenziswa ngokubanzi kwizinto zokwakha, ngakumbi xa zisetyenziselwa udaka kunye nemiphumo ebalulekileyo.
Iimpawu ezisisiseko ze-cellulose ethers
I-cellulose ethers luhlobo lwepolymer efunyenwe ngonyango lwekhemikhali ye-cellulose yendalo. I-cellulose ethers eqhelekileyo iquka i-hydroxypropyl methylcellulose (HPMC), i-methylcellulose (MC), i-carboxymethylcellulose (i-CMC) njl. Ziyakwazi ukunyibilika kakuhle kunye nokukwazi ukutyeba, kwaye zinokwenza izisombululo ezifanayo kunye nezinzile ze-colloidal emanzini. Ezi zakhiwo zenza i-cellulose ethers isetyenziswe ngokubanzi kwizinto zokwakha.
Iimpawu eziphambili ze-cellulose ethers ziquka:
Ukuqina: kunokunyusa kakhulu i-viscosity yeenkqubo zolwelo.
Ukugcinwa kwamanzi: Inesakhono esinamandla sokugcina amanzi kwaye inokugcina amanzi ekulahlekeni ngexesha lokwakha.
Iimpawu zokwenza ifilim: Isenokwenza ifilim efanayo kumphezulu wento ukuyikhusela nokuyandisa.
Ukuthambisa: Ukuphucula ukusebenza kodaka, okwenza kube lula ukuyifaka kunye nokumila.
Indima ephambili ye-cellulose ether kumdaka
Indima ye-cellulose ether kudaka ibonakaliswa ikakhulu kule miba ilandelayo:
1. Ukuphucula ukugcinwa kwamanzi
Udaka luqheleke ekulahlekeni kwamandla kunye neengxaki zokuqhekeka ngenxa yokulahleka kwamanzi ngexesha lokwakha. I-ether ye-cellulose inokugcinwa kakuhle kwamanzi kwaye inokwenza isakhiwo sothungelwano kwi-mortar ukuvala ukufuma kunye nokunciphisa ukuphuphuma kwamanzi kunye nokulahleka kwamanzi, ngaloo ndlela kuphuculwe ukugcinwa kwamanzi omdaka. Oku akugcini nje ukwandisa ixesha lokuvula lomdaka, kodwa kwakhona kuqinisekisa ukuba umdaka ugcwele ngokupheleleyo ngexesha lenkqubo yokuqina, ukwandisa amandla kunye nokuqina.
2. Ukuphucula ukusebenza kolwakhiwo
Umphumo wokuthambisa we-cellulose ether wenza udaka lube lula ngexesha lokwakha, kulula ukulusebenzisa kwaye lusasazeke, kwaye luphucula ukusebenza kakuhle kolwakhiwo. Kwangaxeshanye, ipropathi etyebileyo ye-cellulose ether yenza udaka lube ne-thixotropy elungileyo, oko kukuthi, luba bhityile xa luphantsi kwegunya lokucheba kwaye lubuyele kwi-viscosity yalo yangaphambili emva kokuba amandla okucheba anyamalele. Olu phawu lwenza ukuba udaka lungabi lula ukudilika ngexesha lolwakhiwo kwaye lugcine ubume bokwakha obufanelekileyo.
3. Ukwandisa ukunamathela kodaka
I-ether ye-cellulose inokwenza i-uniform network structure kwi-mortar, ikhulise amandla okubambelela omdaka, kwaye iphucule ukunamathela kwayo kwi-substrate. Oku kunokuthintela udaka ukuba luhlukaniswe kwizinto ezisisiseko ngexesha lenkqubo yokuqina kunye nokunciphisa ukuvela kweengxaki zekhwalithi ezifana nokugoba kunye nokuwa.
4. Ukuphucula ukuxhathisa kokuqhekeka
Ipropathi yokwenza ifilimu ye-cellulose ether ivumela udaka ukuba wenze ifilimu encinci phezu komhlaba ngexesha lenkqubo yokuqina, edlala indima yokukhusela kunye nokunciphisa impembelelo yendawo yangaphandle kumdaka. Kwangaxeshanye, ukugcinwa kwamanzi kunye neepropathi ezityebileyo kunokunciphisa ukuqhekeka kwe-shrinkage okubangelwa ukulahleka kwamanzi kumdaka kunye nokuphucula ukuxhathisa ukuqhekeka.
Iziphumo ezithile ze-cellulose ethers kwiipropati zodaka
Impembelelo ethile ye-cellulose ether ekusebenzeni kodaka inokucazululwa ngokweenkcukacha kule miba ilandelayo:
1. Ukusebenza
Udaka olongeziweyo nge-cellulose ether lusebenza ngcono ngokumalunga nokusebenza komsebenzi. Ugcino lwawo lwamanzi olugqwesileyo kunye nokuthambisa kwenza udaka lube lula ngexesha lolwakhiwo, lusebenze lula, kwaye lungabinzima kakhulu ukulwakha. Kwangaxeshanye, ukuqina kwe-ether ye-cellulose kunokuphucula i-thixotropy yodaka, ukwenzela ukuba udaka lukwazi ukugcina imilo yalo kakuhle ngexesha lokwakha kwaye akulula ukugoba kunye nokugubha.
2. Amandla
Ukugcinwa kwamanzi kwe-cellulose ether kwenza udaka lugcine umswakama owaneleyo ngexesha lenkqubo yokuqina, ikhuthaza ukusabela kwe-hydration ye-samente, kwaye yenza imveliso ye-hydration eqinile, ngaloo ndlela iphucula amandla omdaka. Ukongezelela, ukusabalalisa okufanayo kunye nokubambisana kwe-ether ye-cellulose kunokukwenza ukuba isakhiwo sangaphakathi sodaka sizinzile, sinciphise ukwenzeka kwe-micro-cracks, kunye nokuphucula amandla onke.
3. Ukuqina
Ngenxa yokuba i-cellulose ether inokugcina ngokufanelekileyo ukufuma kwi-mortar, i-mortar inokwenza isakhiwo esifanayo ngexesha lenkqubo yokuqina, ukunciphisa ukuvela kwee-shrinkage cracks, ngaloo ndlela kuphuculwe ukuqina kodaka. Ifilimu eyenziwe yi-cellulose ether inokukhusela umgangatho wodaka ukuya kwinqanaba elithile, ukunciphisa ukukhukuliseka kodaka yimeko yangaphandle, kwaye iphucule ngakumbi ukuqina kwayo.
4. Ukugcinwa kwamanzi kunye nokumelana nokuqhekeka
I-ether ye-cellulose inokuphucula kakhulu ukugcinwa kwamanzi kwi-mortar, ivumela udaka ukuba lugcine umswakama owaneleyo ngexesha lenkqubo yokuqina kunye nokunciphisa ukuvela kokuqhekeka kwe-shrinkage. Ukongezelela, ipropati yokwenza ifilimu ye-cellulose ether ivumela udaka ukuba wenze ifilimu ekhuselayo phezu komhlaba, ukunciphisa impembelelo yendawo yangaphandle kumdaka kunye nokuphucula ukuxhathisa ukuqhekeka.
Ukusetyenziswa kwe-cellulose ether kumdaka kunemiphumo ebalulekileyo. Ukugcinwa kwayo kwamanzi okugqwesileyo, ukuqina, ukwenza ifilimu kunye nokuthambisa kuphucule kakhulu ukusebenza kolwakhiwo, amandla, ukuqina kunye neminye imiba yodaka. Ngoko ke, i-cellulose ether, njengesongezo esibalulekileyo, isetyenziswe ngokubanzi kwizinto zokwakha zanamhlanje kwaye ibe yindlela ebalulekileyo yokuphucula ukusebenza kodaka.
Ixesha lokuposa: Jul-12-2024