Ii-cellulose ethers luhlobo lwee-organic polymer compounds eziguqulwe ngokweekhemikhali kwi-cellulose yendalo. Zisetyenziswa kakhulu kwizixhobo zokwakha, ingakumbi kwizixhobo ezisekwe kwisamente. Impembelelo ye-cellulose ether kwinkqubo yokufunxa isamente ibonakala kakhulu kwezi zinto zilandelayo: ukusasazeka kwee-samente particles, ukugcinwa kwamanzi, impembelelo yokutyeba, kunye nempembelelo kwi-morphology kunye nophuhliso lwamandla eemveliso zokufunxa isamente.
1. Intshayelelo yokufunxwa kwesamente
Inkqubo yokufunxa isamente luluhlu lweempendulo ezintsonkothileyo zomzimba nezekhemikhali phakathi kwesamente namanzi. Ezi mpendulo zibangela ukuba intlama yesamente iqine kancinci kancinci ukuze yenze isakhiwo esiqinileyo, ekugqibeleni ivelise iimveliso zokufunxa ezifana ne-calcium silicate hydrate (CSH) kunye ne-calcium hydroxide (CH). Ngexesha lale nkqubo, izinga lokuphendula ngokufunxa isamente, ukunyibilika kunye nokugcinwa kwamanzi kwe-slurry, kunye nokwenziwa kweemveliso zokufunxa kuchaphazela ngokuthe ngqo amandla kunye nokuqina kwekhonkrithi yokugqibela.
2. Indlela yokusebenza kwee-ether ze-cellulose
I-Cellulose ether idlala indima ebalulekileyo yokulawula izinto ngokwasemzimbeni nangokweekhemikhali kwinkqubo yokufunxa isamente. I-Cellulose ether ichaphazela kakhulu inkqubo yokufunxa isamente ngeendlela ezimbini: enye ichaphazela ukusasazwa kunye nokuphuma kwamanzi kwi-slurry yesamente; enye ichaphazela ukusasazeka kunye nokujiya kwamasuntswana esamente.
Ulawulo lomswakama kunye nokugcinwa kwamanzi
Ii-cellulose ethers zinokuphucula kakhulu ukugcinwa kwamanzi kwezinto ezisekwe kwisamente. Ngenxa yokuba inamandla okusebenzisa amanzi, i-cellulose ether inokwenza isisombululo esizinzileyo se-colloidal emanzini, esinokufunxa kwaye sigcine umswakama. Lo mthamo wokubamba amanzi ubalulekile ekunciphiseni imingxunya ebangelwa kukulahleka kwamanzi ngokukhawuleza kwikhonkrithi ngexesha lokufuma kwangoko. Ingakumbi kwiindawo ezomileyo okanye kwiimeko zokwakha ezishushu kakhulu, i-cellulose ether inokuthintela ngokufanelekileyo amanzi ukuba angatshi ngokukhawuleza kwaye iqinisekise ukuba ubungakanani bamanzi kwi-slurry yesamente banele ukuxhasa impendulo eqhelekileyo yokufuma.
I-Rheology kunye nokuQonda
Ii-cellulose ethers nazo zinokuphucula i-rheology ye-slurry yesamente. Emva kokongeza i-cellulose ether, ukuhambelana kwe-slurry yesamente kuya kwanda kakhulu. Le nto ibangelwa ikakhulu yisakhiwo se-long chain esenziwe zii-molecules ze-cellulose ether emanzini. Le molekyuli ye-long-chain inokuthintela intshukumo yamasuntswana esamente, ngaloo ndlela inyusa i-viscosity kunye nokuhambelana kwe-slurry. Le propati ibaluleke kakhulu kwizicelo ezifana ne-plastering kunye ne-tile adhesives, njengoko ithintela i-samente mortar ukuba ingahambi ngokukhawuleza ngelixa ibonelela ngokusebenza ngcono kolwakhiwo.
Libazisa ukufuma kwamanzi kwaye ulungise ixesha lokuseta
I-Cellulose ether inokulibazisa ukusabela kokufuma kwesamente kwaye yonyuse ixesha lokuqala kunye nexesha lokugqibela lokuseta i-samente slurry. Esi siphumo senzeka kuba iimolekyuli ze-cellulose ether zifunxwa kumphezulu wee-samente particles, zenze umqobo othintela ukudibana ngqo phakathi kwamanzi kunye nee-samente particles, ngaloo ndlela kucothise isantya sokusabela kokufuma. Ngokulibazisa ixesha lokuseta, ii-cellulose ethers zinokuphucula ukusebenza kolwakhiwo, zinike abasebenzi bokwakha ixesha elingakumbi lokwenza uhlengahlengiso kunye nokulungisa.
3. Impembelelo kwimo yeemveliso zokufunxa isamente
Ukubakho kwee-cellulose ethers kuchaphazela nesakhiwo seemveliso zesamente zokufunxa amanzi. Izifundo zibonise ukuba imo yejeli ye-calcium silicate hydrate (CSH) iya kutshintsha emva kokongeza i-cellulose ether. Iimolekyuli ze-cellulose ether zinokuchaphazela isakhiwo sekristale se-CSH, nto leyo eyenza ukuba ikhululeke ngakumbi. Esi sakhiwo sikhululekileyo sinokunciphisa amandla okuqala ukuya kwinqanaba elithile, kodwa sikwanceda ukuphucula ukuqina kwezinto.
Ii-cellulose ethers zinokunciphisa ukwakheka kwe-ettringite ngexesha lenkqubo yokufunxa amanzi. Ekubeni i-cellulose ether ithintela isantya sokufunxa amanzi, isantya sokwakheka kwe-ettringite kwisamente siyancitshiswa, ngaloo ndlela kunciphisa uxinzelelo lwangaphakathi olubangelwa kukwanda komthamo ngexesha lenkqubo yokufunxa.
4. Impembelelo kuphuhliso lwamandla
Ii-cellulose ethers nazo zinempembelelo enkulu ekuphuhlisweni kwamandla ezinto ezisekwe kwisamente. Ngenxa yokuba ii-cellulose ethers zithintela izinga lokufuma kwesamente, uphuhliso lwamandla okuqala lwee-paste zesamente ludla ngokuhamba kancinci. Nangona kunjalo, njengoko impendulo yokufuma iqhubeka, isiphumo sokulawula ukugcinwa kwamanzi kwi-cellulose ether kunye nemo yemveliso yokufuma inokuvela kancinci kancinci, oku kuya kunceda ukuphucula amandla kwinqanaba elilandelayo.
Kufuneka kuqatshelwe ukuba ubungakanani obongezelelweyo kunye nohlobo lwe-cellulose ether zinempembelelo ephindwe kabini kumandla. Ubungakanani obufanelekileyo be-cellulose ether bunokuphucula ukusebenza kolwakhiwo kwaye bunyuse amandla kamva, kodwa ukusetyenziswa ngokugqithisileyo kunokukhokelela ekunciphiseni amandla okuqala ezinto ezisekwe kwisamente kwaye kuchaphazele iimpawu zokugqibela zoomatshini. Ke ngoko, kwizicelo ezisebenzayo, uhlobo kunye nomthamo we-cellulose ether kufuneka ulungiswe kwaye uyilwe ngokweemfuno ezithile zobunjineli.
I-Cellulose ether ichaphazela inkqubo yokufunxa amanzi kunye neempawu zezinto zesamente ngokuphucula ukugcinwa kwamanzi kwezinto ezisekwe kwisamente, ukulungisa izinga lokufunxa amanzi, kunye nokuchaphazela uhlobo lweemveliso zokufunxa amanzi. Nangona ii-cellulose ethers zinokubangela ukulahleka kwamandla okuqala, zinokuphucula ukuqina kunye nokuqina kwekhonkrithi kwixesha elide. Ukongezwa kwe-cellulose ether kunokuphucula kakhulu ukusebenza kolwakhiwo, ngakumbi kwiimeko zokusetyenziswa ezifuna amaxesha amaninzi okusebenza kunye neemfuno eziphezulu zokugcina amanzi. Inezibonelelo ezingenakutshintshwa. Kwizicelo zobunjineli zokwenyani, ukukhetha ngokufanelekileyo uhlobo kunye nomthamo we-cellulose ether kunokulinganisela amandla, ukusebenza kolwakhiwo kunye neemfuno zokuqina kwezinto.
Ixesha leposi: Sep-27-2024