IHydroxypropylmethylcellulose (HPMC) sisongezo esibalulekileyo kwidaka, edlala indima ebalulekileyo ekuphuculeni ukusebenza kodaka. Njengezinto ezingeyotyhefu, ezingangcolisi kunye nokusingqongileyo, i-HPMC ithe ngokuthe ngcembe ithathe indawo yezongezo zemveli ezifana nesitatshi se-ether kunye ne-lignin ether kushishino lokwakha. Eli nqaku liza kuxubusha indima ebalulekileyo ye-HPMC kwidaka ukusuka kwiinkalo ezintathu zokugcinwa kwamanzi, ukusebenza kunye nokubambisana.
I-HPMC inokuphucula ngokufanelekileyo ukugcinwa kwamanzi odaka. Ukugcinwa kwamanzi odaka kubhekiselele ekukwazini kodaka ukugcina umthamo wamanzi ngexesha lokwakha. Ukugcinwa kwamanzi omdaka kuhambelana nokusebenza kwesamente kunye nezongezo ezisetyenziselwa udaka. Ukuba udaka lulahlekelwa ngamanzi amaninzi, luya kubangela ukuba udaka lome, oluya kunciphisa kakhulu ukusebenza kwalo kunye nokunamathela, kwaye luze lubangele iingxaki ezifana nokuqhekeka kwimveliso egqityiweyo.
I-HPMC iqulethe i-hydroxypropyl kunye namaqela e-methyl kwaye i-hydrophilic ephezulu. Iyakwazi ukwenza uluhlu lwefilimu yomhlaba phezu kweengqungquthela zodaka ukuthintela ukuvela kwamanzi kunye nokuphucula ngokufanelekileyo ukugcinwa kwamanzi omdaka. Kwangaxeshanye, i-HPMC inokudibanisa neemolekyuli zamanzi ngokusebenzisa iibhondi ze-hydrogen, nto leyo eyenza kube nzima ukuba iimolekyuli zamanzi zahlukane namasuntswana odaka. Ngoko ke, i-HPMC inempembelelo ebalulekileyo ekuphuculeni ukugcinwa kwamanzi odaka.
I-HPMC inokuphucula ukusebenza kodaka. Ukusetyenzwa kodaka kubhekiselele kwindlela udaka olunokuguqulwa ngayo kunye nokubunjwa ngalo ngexesha lolwakhiwo. Okungcono ukusebenza kodaka, kulula kubasebenzi bokwakha ukulawula imilo kunye nokuhambelana kodaka ngexesha lokwakha. Ukusebenza kakuhle kodaka kunokunciphisa inani leepokotho zomoya kwimveliso egqityiweyo, okwenza isakhiwo sibe lukhuni kwaye siqine.
I-HPMC inokuphucula ngokufanelekileyo ukusebenza kodaka ngokunciphisa i-viscosity yodaka. Ubunzima bemolekyuli ye-HPMC buphezulu kakhulu, kwaye kulula ukwenza iibhondi ze-hydrogen ngeeathomu zamanzi, okukhokelela kwi-viscosity ephezulu. Nangona kunjalo, i-HPMC inokubola ibe ngamaqhekeza amancinci phantsi kwesenzo samandla okucheba, ukunciphisa i-viscosity yodaka. Ngoko ke, xa abasebenzi bokwakha bephatha udaka, iinqununu ze-HPMC ziya kuchithwa, zenze udaka lube manzi ngakumbi kwaye lube lula ukwakhiwa. Ngaphezu koko, amaqela e-hydrophilic kwi-HPMC anokwenza ifilimu yomhlaba phezu kweengqungquthela zodaka, ukunciphisa ukungqubuzana kwe-interparticle phakathi kweengqungquthela zodaka, kunye nokuphucula ngakumbi ukusebenza kodaka.
I-HPMC inokuphucula ukunamathela kodaka. I-adhesion of mortar ibhekisela ekukwazini kwayo ukunamathela ngokuqinileyo kumphezulu we-substrate. Ukubambelela kakuhle kunokwenza uxhulumaniso oluqinileyo noluthembekileyo phakathi kodaka kunye ne-substrate, ukuqinisekisa ukuqina kwemveliso egqityiweyo. Ukongeza, ukunamathela kakuhle kunokwenza ukuba umphezulu wemveliso egqityiweyo ube mpuluswa kwaye ube mhle ngakumbi.
I-HPMC inokuphucula ukunamathela kodaka ngeendlela ezininzi. Okokuqala, i-HPMC inokwenza ifilimu engaphezulu kumphezulu we-substrate emva kokwakhiwa kodaka, enokunciphisa ngokufanelekileyo ukunyanzeliswa komphezulu we-substrate kwaye yenza kube lula ukuba udaka lubambelele kwi-substrate. Okwesibini, iinqununu ze-HPMC zinokwenza isakhiwo sothungelwano kumphezulu we-substrate, ukwandisa indawo yoqhagamshelwano phakathi kodaka kunye ne-substrate, kwaye iphucule ngakumbi ukunamathela komdaka. Ngaphezu koko, amaqela e-hydrophilic kwi-HPMC anokudibaniswa kunye neamolekyu zamanzi, ezinokwandisa ngokufanelekileyo umlinganiselo wamanzi-samente yodaka kunye nokuphucula ngakumbi amandla okubambisana omdaka.
Ukusetyenziswa kwe-HPMC kudaka kuneenzuzo ezininzi ezifana nokugcinwa kwamanzi, ukusebenza, kunye nokuphucula ukunamathela. Ezi zibonelelo azixhasi kuphela abasebenzi bokwakha, kodwa zinefuthe elihle kumgangatho opheleleyo wemveliso egqityiweyo. Ngophuhliso lwesayensi kunye nobuchwepheshe, kukholelwa ukuba i-HPMC iya kudlala indima ebalulekileyo ngakumbi kushishino lokwakha kwaye ibonelele ngezixhobo ezisebenzayo nezikhuselekileyo kushishino lokwakha.
Ixesha lokuposa: Sep-01-2023