I-HPMC (HYDROXYPROPYL Methylcellulose)kungukuhlanganiswa okuvame ukusetshenziswa wokwakha futhi kusetshenziswa kabanzi ku-gypsum ngodaka. Imisebenzi yayo eyinhloko ukwenza ngcono ukusebenza kodaka kodaka, ngcono ukugcinwa kwamanzi, ukuthuthukisa ukunamathela futhi kulungise izakhiwo zesimbobo sodaka. UGepsum Datar uyisitatimende sokwakha nge-gypsum njengengxenye eyinhloko, evame ukusetshenziswa edongeni kanye nophahla lomhlobiso.
1. Umphumela wethamo le-HPMC ekugcinweni kwamanzi ngodaka lwe-gypsum
Ukugcinwa kwamanzi kungenye yezinto ezibalulekile ze-gypsum Data, ezihlobene ngqo nokusebenza kwezokwakha namandla ahlanganisa amandla odaka. I-HPMC, njenge-polymer ephezulu ye-molecular, inokugcinwa kwamanzi okuhle. Ama-molecule alo aqukethe inani elikhulu lamaqembu e-hydroxyl kanye ne-ether. Lawa maqembu e-hydrophilic angakha ama-hydrogen bond ngama-molecule wamanzi ukunciphisa ukungcoliswa kwamanzi. Ngakho-ke, ukungezwa kwenani elifanele le-HPMC kungathuthukisa ngokuphumelelayo ukugcinwa kwamanzi ngodaka futhi kuvikele udaka ekusomisweni ngokushesha okukhulu nangokuqhekeka ebusweni ngesikhathi sokwakha.
Ucwaningo luye lwabonisa ukuthi ngokwanda komthamo we-HPMC, ukugcinwa kwamanzi kodaka kancane kuyanda. Kodwa-ke, lapho umthamo uphezulu kakhulu, i-rhelology yodaka ingaba nkulu kakhulu, ithinta ukusebenza kokwakha. Ngakho-ke, umthamo ofanele we-HPMC udinga ukulungiswa ngokuya ngokusetshenziswa kwangempela.
2. Umphumela wethango le-HPMC emandleni eBonding Of Gypsum Data
Amandla eBonding kungenye indlela ebalulekile ukusebenza ngodaka lwe-gypsum, oluthinta ngqo ukunamathela phakathi kodaka kanye nesisekelo. I-HPMC, njenge-polymer ephezulu yamangqamuzana, ingathuthukisa ukubumbana nokusebenza kwe-bonder yodaka. Inani elifanele le-HPMC lingathuthukisa ukuboshwa kodaka, ukuze likwazi ukunamathela ngokuqinile nodonga futhi lube ngaphansi kokwakhiwa.
Ucwaningo lokuhlola lukhombisile ukuthi umthamo we-HPMC unethonya elikhulu emandleni eBonding Of The Bond. Lapho umthamo we-HPMC ungaphakathi kobubanzi obuthile (imvamisa u-0.2% -0.6%), amandla eBonding akhombisa ukuthambekela okuphezulu. Lokhu kungenxa yokuthi i-HPMC ingathuthukisa ubukhulu bodaka, ukuze ikwazi ukulingana kangcono ne-substrate ngesikhathi sokwakha futhi inciphise ukuchitha nokuchithwa. Kodwa-ke, uma umthamo uphezulu kakhulu, udaka lungaba nolwela ngokweqile, lithinte ukunamathela kwalo ku-substrate, ngaleyo ndlela kunciphise amandla okubopha.
I-3. Umphumela wemithamo ye-HPMC e-fluidity kanye nokwenza umsebenzi wokwakha ngodaka lwe-gypsum
I-Fluidity iyinkomba yokusebenza ebaluleke kakhulu kwinqubo yokwakha ye-Gypsum Data, ikakhulukazi ekwakhiweni kodonga oluphezulu. Ukungezwa kwe-HPMC kungathuthukisa kakhulu uketshezi lodaka, okwenza kube lula ukwakha nokusebenza. Izici zeHlelo le-HPMC Molecular zivumela ukuthi zikhulise ukubonwa kodaka ngokuqina, ngaleyo ndlela kuthuthukise ukusebenza nokusebenza kokwakha kodaka.
Lapho umthamo we-HPMC uphansi, uketshezi lodaka lumpofu, olungaholela ebunzimeni bokwakha futhi baqhekeke. Inani elifanele lomthamo we-HPMC (ngokuvamile phakathi kuka-0.2% -0.6%) lingathuthukisa uketshezi lodaka, thuthukisa ukusebenza kwalo kwe-coaging kanye nomphumela omuhle, futhi ngaleyo ndlela thuthukisa ukusebenza kokwakha. Kodwa-ke, uma umthamo uphezulu kakhulu, uxhaso lukadaka luzoba seluhle kakhulu, inqubo yokwakha izoba nzima, futhi kungahle kuholele ekungcoleni okubonakalayo.
I-4. Umphumela we-HPMC umthamo we-HPMC ngokusoma i-shrinkage ye-gypsum mota
Ukomisa i-shrinkage kungenye impahla ebalulekile yodaka lwe-gypsum. Ukwehla kwe-shrinkage ngokweqile kungadala ukuqhekeka odongeni. Ukungezwa kwe-HPMC kunganciphisa ngempumelelo i-shrinkage yomiswa yodaka. Lolu cwaningo luthole ukuthi inani elifanele le-HPMC linganciphisa ukuhwamuka ngokushesha kwamanzi, ngaleyo ndlela lidale inkinga yokomisa ye-shreskage yodaka lwe-gypsum. Ngaphezu kwalokho, ukwakheka kwamangqamuzana kwe-HPMC kungakha isakhiwo senethiwekhi esizinzile, kuthuthukisa ukumelana nokuqhekeka kokuqhekeka kodaka.
Kodwa-ke, uma umthamo we-HPMC uphezulu kakhulu, kungadala ukuthi udaka lubekele isikhathi eside, lithinte ukusebenza kokwakha. Ngasikhathi sinye, ukubonwa okuphezulu kungadala ukusatshalaliswa kwamanzi okungafanele ngesikhathi sokwakha, okuthinta ukuphuculwa kwe-shrinkage.
I-5. Umphumela we-HPMC umthamo we-HPMC ngokumelana nokuqhekeka kwe-gypsum
Ukumelana nokuqhekeka kuyinkomba ebalulekile yokuhlola ikhwalithi ye-gypsum ngodaka. I-HPMC ingathuthukisa ukumelana kwayo kokuqhekeka ngokwenza ngcono amandla acindezelayo, ukunamathela kanye nokuqina kodaka. Ngokungeza inani elifanele le-HPMC, ukumelana nokuqhekeka kodaka lwe-gypsum kungathuthukiswa ngempumelelo ukugwema ukuqhekeka okubangelwa amandla angaphandle noma izinguquko zokushisa.
Umthamo ofanele we-HPMC ngokuvamile uphakathi kuka-0.3% no-0.5%, ongathuthukisa ubulukhuni besakhiwo sodaka futhi unciphise ukuqhekeka okubangelwa umehluko wokushisa kanye ne-shrinkage. Kodwa-ke, uma umthamo uphezulu kakhulu, ukubonwa ngokweqile kungadala ukuthi udaka lokwelapha kakhulu, ngaleyo ndlela luthinta ukumelana kwalo kokuqhekeka.
6. Ukusebenziseka kahle kanye nokusetshenziswa okusebenzayo komthamo we-HPMC
Kusuka ekuhlaziyeni kwezinkomba zokusebenza okungenhla, umthamo weI-HPMCinomthelela omkhulu ekusebenzeni kodaka lwe-gypsum. Kodwa-ke, uhla lwe-Doplical dosage inqubo esele, futhi umthamo uvame ukunconyelwa ukuba ngu-0.2% kuye ku-0.6%. Izimo ezahlukene zokwakha nezidingo zokusebenzisa zingadinga ushintsho kumthamo ukuze uzuze ukusebenza okuhle kakhulu. Kuzinhlelo zokusebenza ezisebenzayo, ngaphezu komthamo we-HPMC, ezinye izinto zidinga ukucatshangelwa, njengokulingana ngodaka, izakhiwo ze-substrate, kanye nemibandela yokwakha.
Umthamo we-HPMC unomthelela omkhulu ekusebenzeni ngodaka lwe-gypsum. Inani elifanele le-HPMC lingathuthukisa ngempumelelo izakhiwo ezibalulekile zodaka olunjengokugcinwa kwamanzi, amandla okubopha, ukumelana nokuqhekeka. Ukulawulwa komthamo kufanele kubhekwe ngokugcwele izidingo zokusebenza kokwakha namandla okugcina odaka. Umthamo we-HPMC onengqondo awukwazi ukwenza ngcono ukusebenza kodaka kuphela, kodwa futhi uthuthukise ukusebenza kwesikhathi eside kodaka. Ngakho-ke, ekukhiqizweni kwangempela nokwakha, umthamo we-HPMC kufanele ulungiswe ngokwezidingo ezithile ukuze uzuze umphumela omuhle kakhulu.
Isikhathi sePosi: Dece-16-2024