I-Hydroxypropylmethylcellulose (HPMC) ifumana ukuthandwa kwishishini lokwakha ngenxa yezinto ezigqwesileyo zokugcina amanzi. I-HPMC yi-ether engeyo-ionic, i-cellulose e-soluble yamanzi, esetyenziswa ngokubanzi kumashishini ahlukeneyo. Ekwakhiweni, ngokuqhelekileyo kusetyenziswa njenge-thickener, i-binder kunye ne-agent yokugcina amanzi kwizinto zesamente kunye nodaka. Ukulunga kwe-HPMC nako kunempembelelo ethile ekusebenzeni kwayo kokugcinwa kwamanzi, esiya kuphonononga kweli nqaku.
Okokuqala, kubalulekile ukuqonda ukuba yintoni HPMC kwaye isebenza njani. I-HPMC iphuma kwi-cellulose, i-polymer yendalo ephuma kumaplanga kunye nemicu yezityalo. I-HPMC iveliswa ngokuguqula iikhemikhali zeselulosi ngepropylene oxide kunye nemethyl chloride, eyongeza i-hydroxypropyl kunye namaqela e-methyl kwi-molecule ye-cellulose. Olu tshintsho lwenza i-HPMC inyibilike ngakumbi emanzini kwaye inike iipropati ezithile ezinjengokuqina, i-emulsification kunye nokugcinwa kwamanzi.
Iipropati zokugcina amanzi ze-HPMC zibaluleke kakhulu kushishino lokwakha, apho ulawulo lokufuma lubalulekile. Xa i-HPMC yongezwa kwizinto ze-cementitious okanye udaka, yenza ifilimu ejikeleze amaqhekeza e-samente, ukunciphisa ukungena kwamanzi. Ifilimu iphinda incede ukucotha ukuphuphuma kwamanzi kumxube, ukunika i-samente ixesha elingakumbi lokumanzisa. Ngenxa yoko, izinto zesamente kunye nodaka luhlala lumanzi ixesha elide, lubavumela ukuba baphilise ngokufanelekileyo kwaye bafumane amandla aphezulu.
Ukulunga kwe-HPMC kudlala indima ebalulekileyo ekugcinweni kwayo kwamanzi. Xa sithetha ngokubanzi, okona kucothayo amasuntswana e-HPMC, kokukhona ukugcinwa kwamanzi kubhetele. Oku kungenxa yokuba amasuntswana amancinci anommandla omkhulu, ovumela ukuba benze ifilimu ebanzi malunga neengqungquthela zesamente. Ifilimu inceda ukudala umqobo phakathi kwesamente kunye namanzi, ukunciphisa ukungena kwamanzi kumxube. Ngenxa yoko, umxube uhlala umanzi ixesha elide, unika ixesha elingakumbi lokuba isamente imanzi kwaye udaka lunyange.
Kodwa kuyafaneleka ukuba uqaphele ukuba i-fineness ye-HPMC akufanele ibe yodwa ingqalelo xa ukhetha i-arhente yokugcina amanzi. Ezinye izinto ezifana nodidi lwesamente, umlinganiselo wamanzi-samente, ubushushu kunye nokufuma kuchaphazela iipropati zokugcina amanzi ze-HPMC. Ngoko ke, kubalulekile ukukhetha imveliso ye-HPMC efanelekileyo kwisicelo esithile kunye nokusetyenziswa kwendawo.
Isishwankathelo, kukho iingenelo ezininzi zokusebenzisa i-HPMC njenge-arhente yokugcina amanzi kwizinto zesamente kunye nodaka. Iimpawu zayo zokugcina amanzi ziqinisekisa ukuba umxube uhlala umanzi ixesha elide, unika ixesha elingakumbi lokuba isamente imanzi kwaye udaka lunyange. Ukulunga kwe-HPMC yinto ebalulekileyo echaphazela amandla okugcina amanzi, i-fineral particles, ingcono ukusebenza. Nangona kunjalo, ezinye izinto ezifana nohlobo lwesamente, umlinganiselo wesamente yamanzi, ubushushu kunye nokufuma kufuneka ziqwalaselwe xa kukhethwa imveliso ye-HPMC. Ngokubanzi, ukusebenzisa i-HPMC yindlela ebalaseleyo yokuphucula ukusebenza kunye nokuphila ixesha elide kwezinto zesamente kunye nodaka kushishino lokwakha.
Ixesha lokuposa: Aug-14-2023