IHydroxypropyl Methylcellulose (HPMC)sisongezelelo sezinto zokwakha ezibalulekileyo, ezisetyenziswa ngokubanzi kudaka lwesamente, udaka olomileyo, iingubo kunye nezinye iindawo. I-HPMC idlala indima ebalulekileyo ekugcineni amanzi odaka, kwaye inokuphucula kakhulu ukusebenza, ulwelo, ukuncamathela kunye nokumelana nokuqhekeka kodaka. Ingakumbi kulwakhiwo lwangoku, idlala indima engenakuphinda ithathelwe indawo ekuphuculeni umgangatho kunye nesiphumo sokwakhiwa kodaka.
1. Iimpawu ezisisiseko ze-HPMC
I-HPMC yi-derivative cellulose derivative yi-chemistry cellulose, kunye nokunyibilika kakuhle kwamanzi, ukunamathela kunye neempawu zokuqina. Iimolekyuli ze-AnxinCel®HPMC ziqulethe amaqela amabini, i-hydroxypropyl kunye ne-methyl, eyenza ibe neempawu zokudibanisa i-hydrophilicity kunye ne-hydrophobicity, kwaye inokudlala ngokufanelekileyo indima yayo phantsi kweemeko ezahlukeneyo zokusingqongileyo. Imisebenzi yayo ephambili ibandakanya ukuqina, ukugcinwa kwamanzi, ukuphucula i-rheology kunye nokunamathela kodaka, njl.
2. Inkcazo kunye nokubaluleka kokugcinwa kwamanzi
Ukugcinwa kwamanzi odaka kubhekiselele kubuchule bodaka ukugcina amanzi ngexesha lenkqubo yokwakha. Ukulahlekelwa kwamanzi ngodaka kuchaphazela ngokuthe ngqo inkqubo yayo yokuqina, amandla kunye nokusebenza kokugqibela. Ukuba amanzi aba ngumphunga ngokukhawuleza kakhulu, isamente kunye nezinye izinto zesamente kudaka aziyi kuba nexesha elaneleyo lokungena kwi-hydration reaction, ekhokelela kumandla okwaneleyo odaka kunye nokunamatheliswa kakubi. Ngoko ke, ukugcinwa kakuhle kwamanzi ngundoqo ekuqinisekiseni umgangatho wodaka.
3. Isiphumo se-HPMC ekugcinweni kwamanzi ngodaka
Ukongezwa kwe-HPMC kumdaka kunokuphucula kakhulu ukugcinwa kwamanzi kudaka, olubonakaliswa ngokukodwa kule miba ilandelayo:
(1) Ukuphucula umthamo wokugcina amanzi kudaka
I-HPMC inokwenza ulwakhiwo olufana ne-hydrogel kudaka, olunokuthi lufunxe kwaye lugcine isixa esikhulu samanzi, ngaloo ndlela ilibazise ukuphuphuma kwamanzi. Ngokukodwa xa ukwakhiwa kwiqondo lokushisa eliphezulu okanye kwindawo eyomileyo, ukugcinwa kwamanzi kwe-HPMC kudlala indima ebalulekileyo. Ngokuphucula ukugcinwa kwamanzi, i-HPMC inokuqinisekisa ukuba amanzi kumdaka unokuthatha inxaxheba ngokupheleleyo kwi-hydration reaction ye-samente kunye nokuphucula amandla omdaka.
(2) Ukuphucula ulwelo kunye nokusebenza kodaka
Ngethuba lenkqubo yokwakha, i-mortar idinga ukugcina i-fluidity ethile ukuququzelela ukusebenza kwabasebenzi bokwakha. Ukugcinwa kakuhle kwamanzi kunokucothisa ngokufanelekileyo isantya sokumisa udaka, okwenza kube lula kwaye kube lula kubasebenzi bokwakha ukwenza imisebenzi efana nokuthambisa kunye nokukhuhla. Ukongeza, i-HPMC inokuphucula i-viscosity yodaka kwaye ithintele ukwahlukana kodaka okanye ukuchithwa kwentlenga, ngaloo ndlela igcina ukufana kwayo.
(3) Ukuthintela ukuqhekeka komphezulu wodaka
Emva kokuba i-HPMC iphucule ukugcinwa kwamanzi kwidaka, inokunciphisa ukuvela kwamanzi ngokukhawuleza kumphezulu wodaka kunye nokunciphisa umngcipheko wokuqhekeka. Ngokukodwa kwindawo enobushushu obuphezulu okanye ukufuma okuphantsi, ukuphuphuma kwamanzi ngokukhawuleza kunokubangela iintanda kumhlaba wodaka. I-HPMC inceda ukulawula ibhalansi yokufuma yodaka ngokunciphisa ilahleko yamanzi, ukugcina ingqibelelo yodaka kunye nokuphepha ukubunjwa kweentanda.
(4) Ukwandisa ixesha elivulekileyo lodaka
Ixesha elivulekileyo lodaka libhekiselele kwixesha apho udaka lunokusebenza ngexesha lomsebenzi wokwakha. Ixesha elifutshane kakhulu elivulekileyo liya kuchaphazela ukusebenza kakuhle kolwakhiwo. Ukongezwa kwe-HPMC kunokwandisa ngokufanelekileyo ixesha elivulekileyo lodaka, ukunika abasebenzi bokwakha ixesha elingakumbi lokuqhuba imisebenzi efana nokukhuhla kunye nokuthambisa. Ngokukodwa kwiindawo zokwakha eziyinkimbinkimbi, ukwandisa ixesha elivulekileyo kunokuqinisekisa ukunamathela kunye nokusebenza kodaka.
4. Inkqubo yempembelelo ye-HPMC kugcino lwamanzi oludaka
Iindlela eziphambili ze-HPMC ekuphuculeni ugcino lwamanzi oludaka zezi zilandelayo:
(1) I-hydration kunye nesakhiwo se-molecular
Iimolekyuli ze-HPMC ziqulethe inani elikhulu le-hydrophilic hydroxyl (-OH) kunye namaqela e-hydroxypropyl (-CH2OH), anokwenza iibhondi ze-hydrogen kunye neemolekyuli zamanzi kunye nokuphucula i-adsorption ye-molecule yamanzi. Ukongeza, i-HPMC inesakhiwo esikhulu semolekyuli kwaye inokwenza ulwakhiwo lothungelwano olunamacala amathathu kudaka, olunokuthi lubambe kwaye lugcine amanzi kwaye lucothise izinga lokuphuma kwamanzi.
(2) Ukwandisa ukuhambelana kunye ne-viscosity yodaka
Xa i-AnxinCel®HPMC yongezwa kwi-mortar njenge-thickener, iya kwandisa kakhulu ukuhambelana kunye ne-viscosity yomdaka, okwenza udaka luzinzile kwaye lunciphise ukulahleka kwamanzi. Ngokukodwa kwindawo yokwakha eyomileyo, isiphumo sokujiya se-HPMC sinceda ukuphucula ukusebenza kodaka lokuchasa ukuqhekeka.
(3) Ukuphucula ukuzinza kwesakhiwo sodaka
I-HPMC inokuphucula ukudityaniswa kodaka kunye nokuphucula ukuzinza kwesakhiwo sodaka ngokusebenzisa i-intermolecular interactions. Olu uzinzo luvumela umswakama wodaka ukuba ugcinwe phakathi kweengqungquthela zesamente ixesha elide, ngaloo ndlela uqinisekisa ukuphendula okupheleleyo kwesamente kunye namanzi kunye nokuphucula amandla omdaka.
5. Isiphumo se-HPMC kwizicelo ezibonakalayo
Kwizicelo ezisebenzayo,HPMCidla ngokusetyenziswa kunye nezinye izongezo (ezifana neeplasticizers, dispersants, etc.) ukufezekisa eyona nto intle yodaka. Ngomlinganiselo ofanelekileyo, i-HPMC inokudlala iindima ezahlukeneyo kwiindidi ezahlukeneyo zodaka. Ngokomzekelo, udaka oluqhelekileyo lwesamente, udaka lwe-cementitious, udaka olomileyo, njl., lunokuphucula ngokufanelekileyo ukugcinwa kwamanzi kunye nezinye iimpawu zodaka.
Indima ye-HPMC kudaka ayinakujongelwa phantsi. Iphucula kakhulu umgangatho kunye nokusetyenziswa kwesiphumo sodaka ngokuphucula ukugcinwa kwamanzi kwidaka, ukwandisa ixesha elivulekileyo, kunye nokuphucula ukusebenza kolwakhiwo. Kulwakhiwo lwangoku, ngokuntsokotha okwandayo kobuchwephesha bokwakha kunye nokuphuculwa okuqhubekayo kweemfuno zokusebenza kodaka, i-HPMC, njengesongezo esiphambili, idlala indima ebaluleke kakhulu.
Ixesha lokuposa: Feb-15-2025