Ukuthetha ngeHydroxypropyl Methyl Cellulose (HPMC)

1. Yintoni igama elisisibizo le-hydroxypropyl methylcellulose?

——Impendulo: I-Hydroxypropyl Methyl Cellulose, isiNgesi: I-Hydroxypropyl Methyl Cellulose Isifinyezo: I-HPMC okanye i-MHPC Igama elingaqhelekanga: I-Hypromellose; I-Cellulose I-Hydroxypropyl Methyl Ether; I-Hypromellose, I-Cellulose, i-2-hydroxypropylmethyl I-Cellulose ether. I-Cellulose hydroxypropyl methyl ether I-Hyprolose.

2. Yintoni eyona nto isetyenziswa kakhulu yi-hydroxypropyl methylcellulose (HPMC)?

——Impendulo: I-HPMC isetyenziswa kakhulu kwizixhobo zokwakha, kwiingubo, kwiiresini zokwenziwa, kwiiseramikhi, kumayeza, ekutyeni, kumalaphu, kwezolimo, kwizinto zokuthambisa, kwicuba nakwamanye amashishini. I-HPMC inokwahlulwa ibe ngamabakala okwakha, amabakala okutya kunye namabakala amayeza ngokwenjongo. Okwangoku, uninzi lweemveliso zasekhaya zingamabakala okwakha. Kwinqanaba lokwakha, umgubo we-putty usetyenziswa kakhulu, malunga ne-90% isetyenziselwa umgubo we-putty, kwaye okuseleyo kusetyenziselwa udoti wesamente kunye neglu.

3. Kukho iintlobo ezahlukeneyo ze-hydroxypropyl methylcellulose (HPMC), kwaye yintoni umahluko kwindlela ezisetyenziswa ngayo?

——Impendulo: I-HPMC inokwahlulwahlulwa ibe yi-instant type kunye ne-hot-dissolution type. Iimveliso ze-instant type ziyasasazeka ngokukhawuleza emanzini abandayo kwaye zinyamalale emanzini. Ngeli xesha, ulwelo aluna-viscosity kuba i-HPMC isasazeka kuphela emanzini ngaphandle kokunyibilika ngokwenene. Malunga nemizuzu emi-2, i-viscosity yolwelo iyanda kancinci kancinci, yenze i-colloid ebonakalayo ethambileyo. Iimveliso ze-hot-melt, xa zidibene namanzi abandayo, zinokusasazeka ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu. Xa ubushushu buhla bufikelela kubushushu obuthile, i-viscosity iya kubonakala kancinci ide yenze i-viscosity ebonakalayo ethambileyo. Uhlobo lwe-hot-melt lunokusetyenziswa kuphela kwi-putty powder kunye ne-mortar. Kwi-liquid glue kunye nepeyinti, kuya kubakho i-grouping phenomenon kwaye ayinakusetyenziswa. Uhlobo lwe-instant lunoluhlu olubanzi lwezicelo. Lunokusetyenziswa kwi-putty powder kunye ne-mortar, kunye ne-liquid glue kunye nepeyinti, ngaphandle kweziphazamiso.

4. Ungayikhetha njani i-hydroxypropyl methylcellulose (HPMC) efanelekileyo ngeenjongo ezahlukeneyo?

——Impendulo::Ukusetyenziswa komgubo we-putty: Iimfuneko ziphantsi kakhulu, kwaye i-viscosity yi-100,000, nto leyo eyaneleyo. Into ebalulekileyo kukugcina amanzi kakuhle. Ukusetyenziswa kodaka: iimfuno eziphezulu, i-viscosity ephezulu, i-150,000 ingcono. Ukusetyenziswa kweglu: iimveliso ezikhawulezileyo ezine-viscosity ephezulu ziyafuneka.

5. Yintoni ekufuneka iqwalaselwe xa kusetyenziswa ulwalamano phakathi kwe-viscosity kunye nobushushu be-HPMC?

——Impendulo: Ubuninzi be-HPMC buhambelana ngokuphambeneyo nobushushu, oko kukuthi, ubunzima buyanda njengoko ubushushu buncipha. Ubunzima bemveliso esihlala sibhekisela kuyo bubhekisa kwisiphumo sovavanyo lwesisombululo sayo samanzi esiyi-2% kubushushu obuyi-20 degrees Celsius.

Kwimisebenzi ebonakalayo, kufuneka kuqatshelwe ukuba kwiindawo ezinomahluko omkhulu kubushushu phakathi kwehlobo nobusika, kucetyiswa ukusebenzisa i-viscosity ephantsi ebusika, nto leyo elungele ukwakhiwa. Ngaphandle koko, xa ubushushu buphantsi, i-viscosity ye-cellulose iya kwanda, kwaye imvakalelo yesandla iya kuba nzima xa ikrwelwa.

I-viscosity ephakathi: 75000-100000 isetyenziselwa ikakhulu i-putty

Isizathu: ukugcina amanzi kakuhle

Ubuninzi obuphezulu: 150000-200000 Isetyenziswa kakhulu kwi-polystyrene particle thermal insulation mortar rubber powder kunye ne-vitrified microbead thermal insulation mortar.

Isizathu: I-viscosity iphezulu, i-mortar ayilula ukuyiwa, idilike, kwaye ulwakhiwo luphuculwe.

6. I-HPMC yi-non-ionic cellulose ether, ngoko ke yintoni i-non-ionic?

——Impendulo: Ngokwendlela eqhelekileyo, ii-non-ions zizinto ezingayiyo i-ion emanzini. I-ionization ibhekisa kwinkqubo apho i-electrolyte idityaniswe khona ibe zii-ion ezitshajiweyo ezinokuhamba ngokukhululekileyo kwisinyibilikisi esithile (njengamanzi, utywala). Umzekelo, i-sodium chloride (NaCl), ityuwa esiyityayo yonke imihla, iyanyibilika emanzini kwaye i-ionized ukuvelisa ii-ion ze-sodium ezihambayo ngokukhululekileyo (Na+) ezitshajiweyo kakuhle kunye nee-ion ze-chloride (Cl) ezitshajiweyo kakubi. Oko kukuthi, xa i-HPMC ifakwa emanzini, ayizukuhlukana ibe zii-ion ezitshajiweyo, kodwa ikhona kwimo yeemolekyuli.