Ukukhuluma nge-Hydroxypropyl Methyl Cellulose (HPMC)

1. Iyini igama eliyisibongo le-hydroxypropyl methylcellulose?

——Impendulo: I-Hydroxypropyl Methyl Cellulose, isiNgisi: I-Hydroxypropyl Methyl Cellulose Isifinyezo: I-HPMC noma i-MHPC Igama elihlukile: 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. Iyini ukusetshenziswa okuyinhloko kwe-hydroxypropyl methylcellulose (HPMC)?

——Impendulo: I-HPMC isetshenziswa kabanzi ezintweni zokwakha, ezimbozweni, ezitsheni zokwenziwa, ezitsheni zobumba, kwezokwelapha, ekudleni, ezindwangu, kwezolimo, ezimonyweni, egwayi nakwezinye izimboni. I-HPMC ingahlukaniswa ngebanga lokwakha, izinga lokudla kanye nezinga lemithi ngokwenhloso. Njengamanje, iningi lemikhiqizo yasekhaya libanga lokwakha. Ebangeni lokwakha, i-putty powder isetshenziswa ngenani elikhulu, cishe u-90% usetshenziselwa i-putty powder, kanti okusele kusetshenziselwa i-samente mortar kanye ne-glue.

3. Kunezinhlobo eziningana ze-hydroxypropyl methylcellulose (HPMC), futhi yimuphi umehluko ekusetshenzisweni kwazo?

——Impendulo: I-HPMC ingahlukaniswa ngohlobo olusheshayo kanye nohlobo lokuncibilika okushisayo. Imikhiqizo yohlobo olusheshayo isakazeka ngokushesha emanzini abandayo bese inyamalala emanzini. Ngalesi sikhathi, uketshezi alunawo u-viscosity ngoba i-HPMC ihlakazeka kuphela emanzini ngaphandle kokuncibilika kwangempela. Cishe imizuzu emi-2, u-viscosity woketshezi uyanda kancane kancane, wakhe i-colloid ecacile ethambile. Imikhiqizo encibilikayo eshisayo, uma ihlangana namanzi abandayo, ingahlakazeka ngokushesha emanzini ashisayo bese inyamalala emanzini ashisayo. Lapho izinga lokushisa lehla liye ezingeni lokushisa elithile, u-viscosity uzovela kancane kancane uze wakhe i-colloid ecacile ethambile. Uhlobo oluncibilikayo olushisayo lungasetshenziswa kuphela ku-putty powder kanye no-mortar. Ku-glue nopende oluyi-liquid, kuzoba khona isenzakalo sokuhlanganisa futhi alukwazi ukusetshenziswa. Uhlobo olusheshayo lunezinhlobo eziningi zokusetshenziswa. Lungasetshenziswa ku-putty powder kanye no-mortar, kanye ne-liquid glue nopende, ngaphandle kokuphikisana.

4. Ungayikhetha kanjani i-hydroxypropyl methylcellulose (HPMC) efanelekile ngezinjongo ezahlukene?

——Impendulo::Ukusetshenziswa kwempuphu ye-putty: Izidingo ziphansi kakhulu, kanti i-viscosity ingu-100,000, okwanele. Into ebalulekile ukugcina amanzi kahle. Ukufakwa kwe-mortar: izidingo eziphezulu, i-viscosity ephezulu, i-150,000 ingcono. Ukufakwa kwe-glue: imikhiqizo esheshayo ene-viscosity ephezulu iyadingeka.

5. Yini okufanele inakwe ekusetshenzisweni kwangempela kobudlelwano phakathi kwe-viscosity kanye nokushisa kwe-HPMC?

——Impendulo: I-viscosity ye-HPMC ilingana ngokungalingani nezinga lokushisa, okungukuthi, i-viscosity iyanda njengoba izinga lokushisa lehla. I-viscosity yomkhiqizo esivame ukubhekisela kuwo ibhekisela kumphumela wokuhlolwa kwesisombululo sawo samanzi esingu-2% ekushiseni okungama-degrees Celsius angu-20.

Ekusetshenzisweni okungokoqobo, kufanele kuqashelwe ukuthi ezindaweni ezinomehluko omkhulu wokushisa phakathi kwehlobo nobusika, kunconywa ukusebenzisa i-viscosity ephansi ebusika, okuyinto evumelana kakhulu nokwakhiwa. Ngaphandle kwalokho, lapho izinga lokushisa liphansi, i-viscosity ye-cellulose izokwanda, futhi umuzwa wesandla uzoba nzima lapho kukhuhlwa.

I-viscosity ephakathi: 75000-100000 esetshenziswa kakhulu kwi-putty

Isizathu: ukugcina amanzi kahle

I-viscosity ephezulu: 150000-200000 Isetshenziswa kakhulu ku-polystyrene particle thermal insulation mortar impuphu yerabha kanye ne-vitrified microbead thermal insulation mortar.

Isizathu: I-viscosity iphezulu, i-mortar akulula ukuyiwa, iwa, futhi ukwakhiwa kwayo kuyathuthukiswa.

6. I-HPMC iyi-ether ye-cellulose engeyona i-ionic, ngakho-ke iyini i-non-ionic?

——Impendulo: Ngokwe-layman, ama-non-ion ayizinto ezingayi-ion emanzini. I-ionization ibhekisela enkambisweni lapho i-electrolyte ihlukaniswa khona ibe ama-ion ashajiwe angahamba ngokukhululeka ku-solvent ethile (njengamanzi, utshwala). Isibonelo, i-sodium chloride (NaCl), usawoti esiwudla nsuku zonke, uyancibilika emanzini futhi uyayi-ion ukuze ukhiqize ama-ion e-sodium ahambayo ngokukhululeka (Na+) ashajiwe kahle kanye nama-ion e-chloride (Cl) ashajiwe kabi. Okusho ukuthi, uma i-HPMC ifakwa emanzini, ngeke ihlukane ibe ama-ion ashajiwe, kodwa ikhona ngesimo sama-molecule.