Yiziphi izindlela zokuchithwa kwe-hydroxypropyl methylcellulose HPMC?

1. Yiziphi izindlela zokuchithwa kwe-hydroxypropyl methylcellulose HPMC?

Impendulo: Indlela yokuchithwa kwamanzi ashisayo: Njengoba i-HPMC ingancibiliki emanzini ashisayo, i-HPMC ingahlakazwa ngokulinganayo emanzini ashisayo esigabeni sokuqala, bese incibilika ngokushesha lapho isipholile. Izindlela ezimbili ezijwayelekile zichazwa kanje:

1), engeza i-1/3 noma i-2/3 yenani elidingekayo lamanzi esitsheni, bese ushisisa ku-70 ° C, uhlakaze i-HPMC ngokwendlela ye-1), futhi ulungise udaka lwamanzi ashisayo; bese ufaka inani elisele lamanzi abandayo emanzini ashisayo ashisayo, ingxube ipholile ngemva kokugqugquzela.

Indlela yokuxuba uphuphu: hlanganisa i-HPMC powder nenani elikhulu lezinye izinto eziyimpuphu, xuba kahle ne-mixer, bese wengeza amanzi ukuze uhlakaze, bese i-HPMC ingancibilika ngalesi sikhathi ngaphandle kokuhlanganiswa, ngoba kune-HPMC encane kuphela kuwo wonke amancanyana. I-corner Powder, izoncibilika ngokushesha lapho ihlangana namanzi. ——Abakhiqizi bempuphu nodaka basebenzisa le ndlela. [I-Hydroxypropyl methylcellulose (HPMC) isetshenziswa njenge-thickener kanye ne-ejenti yokugcina amanzi odakeni lwe-putty powder.

2) Faka inani elidingekayo lamanzi ashisayo esitsheni bese ushisa kuze kufike ku-70°C. I-hydroxypropyl methylcellulose yengezwa kancane kancane ngaphansi kokunyakaziswa kancane, ekuqaleni i-HPMC yantanta phezu kwamanzi, bese kancane kancane yakha i-slurry, eyapholiswa ngaphansi kokunyakaziswa.

2. Kunezinhlobo ezimbalwa ze-hydroxypropyl methylcellulose HPMC. Uyini umehluko ekusetshenzisweni kwabo?

Impendulo: I-Hydroxypropyl methylcellulose HPMC ingahlukaniswa ngohlobo olusheshayo kanye nohlobo lokuqedwa okushisayo. Imikhiqizo yohlobo olusheshayo ihlakazeka ngokushesha emanzini abandayo bese inyamalala emanzini. Ngalesi sikhathi, uketshezi alunayo i-viscosity, ngoba i-HPMC ihlakazekile emanzini kuphela, akukho ukuncibilika kwangempela. Cishe imizuzu emi-2, i-viscosity yoketshezi iyanda kancane kancane, yakha i-viscous colloid esobala. Imikhiqizo encibilikayo eshisayo, lapho ihlangene namanzi abandayo, ingahlakazeka ngokushesha emanzini ashisayo futhi inyamalale emanzini ashisayo. Lapho izinga lokushisa lehlela ezingeni elithile lokushisa, i-viscosity izovela kancane kancane ize yakhe i-viscous colloid ebonakalayo. Uhlobo lwe-hot-melt lungasetshenziswa kuphela ku-putty powder nodaka. Ku-glue ewuketshezi nopende, kuzoba nesenzakalo sokuqoqa futhi ngeke sisetshenziswe. Uhlobo olusheshayo lunohlu olubanzi lwezinhlelo zokusebenza. Ingasetshenziswa ku-putty powder nodaka, kanye ne-glue ewuketshezi nopende, ngaphandle kokuphikisana.

3. Iyini ukusetshenziswa okuyinhloko kwe-hydroxypropyl methylcellulose (HPMC)?

Impendulo: I-HPMC isetshenziswa kabanzi ezintweni zokwakha, okokugqoka, ama-synthetic resin, izitsha zobumba, imithi, ukudla, izindwangu, ezolimo, izimonyo, ugwayi nezinye izimboni. I-HPMC ingahlukaniswa: Ibanga lokwakha, ibanga lokudla kanye nebanga lezemithi ngokuya ngokusetshenziswa. Njengamanje, iningi lemikhiqizo yasekhaya isezingeni lokwakha. Ebangeni lokwakha, i-putty powder isetshenziswa ngenani elikhulu, cishe i-90% isetshenziselwa i-putty powder, kanti enye isetshenziselwa udaka lukasimende neglue.

4. Indlela yokwahlulela ikhwalithi ye-hydroxypropyl methylcellulose (HPMC) kalula nangendlela enembile?

Impendulo: (1) Amandla adonsela phansi athize: Uma amandla adonsela phansi athile emakhulu, esindayo siba ngcono. Isilinganiso sikhulu, ngokuvamile ngoba

(2) Ubumhlophe: Nakuba ubumhlophe bungakwazi ukunquma ukuthi i-HPMC kulula yini ukuyisebenzisa, futhi uma ama-ejenti amhlophe engezwa phakathi nenqubo yokukhiqiza, izothinta ikhwalithi yayo. Nokho, iningi lemikhiqizo emihle inobumhlophe obuhle.

(3) Ubuhle: Ubucwebe be-HPMC ngokuvamile buba ne-80 mesh kanye ne-100 mesh, kanye ne-120 mesh mincane. Iningi le-HPMC elikhiqizwe e-Hebei linezikhala ezingama-80. Ukucoleka kokucoleka, kuba ngcono ngokujwayelekile.

(4) Ukudlulisa ukukhanya: faka i-hydroxypropyl methylcellulose (HPMC) emanzini ukuze wenze i-colloid ekhanyelayo, futhi uhlole ukudluliswa kwayo kokukhanya. Ukuphakama kokudlulisa ukukhanya, kungcono, okubonisa ukuthi kukhona okuncane okungancibiliki kuwo. . Ukufinyeleleka kwereactor eqondile ngokuvamile kuhle, futhi lokho kwereactor evundlile kubi kakhulu, kodwa akusho ukuthi ikhwalithi yereactor eqondile ingcono kunele reactor evundlile, futhi kunezici eziningi zokunquma ikhwalithi yomkhiqizo. . Okuqukethwe kweqembu le-hydroxypropyl kulo kuphezulu, futhi okuqukethwe kweqembu le-hydroxypropyl kuphezulu, nokugcinwa kwamanzi kungcono.

5. Yiziphi izinkomba zobuchwepheshe eziyinhloko ze-hydroxypropyl methylcellulose (HPMC)?

Impendulo: Okuqukethwe kwe-Hydroxypropyl kanye ne-viscosity, abasebenzisi abaningi bakhathazekile ngalezi zinkomba ezimbili. Labo abanokuqukethwe okuphezulu kwe-hydroxypropyl ngokuvamile banokugcinwa kwamanzi okungcono. I-viscosity ephezulu, ukugcinwa kwamanzi, ngokuqhathaniswa (kunokuba

6. Iyiphi i-viscosity efanele ye-hydroxypropyl methylcellulose (HPMC)?

Impendulo: I-putty powder ngokuvamile i-yuan engu-100,000, futhi izidingo zodaka ziphakeme, futhi kulula ukusebenzisa i-yuan engu-150,000. Ngaphezu kwalokho, umsebenzi obaluleke kakhulu we-HPMC ukugcinwa kwamanzi, okulandelwa ukuqina. Ku-putty powder, inqobo nje uma ukugcinwa kwamanzi kuhle futhi i-viscosity iphansi (70,000-80,000), kungenzeka futhi. Yiqiniso, ukuphakama kwe-viscosity, kungcono ukugcinwa kwamanzi okuhlobene. Lapho i-viscosity idlula i-100,000, i-viscosity izothinta ukugcinwa kwamanzi. Akusenani. Ngokuphelele) futhi kungcono, futhi i-viscosity iphakeme, futhi kungcono ukuyisebenzisa odakeni lukasimende.

7. Yiziphi izinto zokusetshenziswa eziyinhloko ze-hydroxypropyl methylcellulose (HPMC)?

Impendulo: Izinto zokusetshenziswa eziyinhloko ze-hydroxypropyl methylcellulose (HPMC): ukotini ocolile, i-methyl chloride, i-propylene oxide, nezinye izinto zokusetshenziswa, i-caustic soda, i-asidi, i-toluene, i-isopropanol, njll.

8. Uyini umsebenzi oyinhloko wokusetshenziswa kwe-HPMC ku-putty powder, futhi ingabe kwenzeka ngamakhemikhali?

Impendulo: Ku-putty powder, i-HPMC idlala izindima ezintathu zokuqina, ukugcinwa kwamanzi nokwakha. Ukuqina: I-Cellulose ingajiywa ukuze imise futhi igcine umfaniswano wekhambi phezulu naphansi, futhi imelane nokuwohloka. Ukugcinwa kwamanzi: yenza i-putty powder yome kancane, futhi usize i-calcium yomlotha ukuba isabele ngaphansi kwesenzo samanzi. Ukwakhiwa: I-Cellulose inomphumela wokugcoba, ongenza i-putty powder ibe nokwakhiwa okuhle. I-HPMC ayibambi iqhaza kunoma yikuphi ukusabela kwamakhemikhali, kodwa idlala indima yokusiza kuphela. Ukwengeza amanzi ku-putty powder bese uyibeka odongeni ukusabela kwamakhemikhali, ngoba kwakhiwa izinto ezintsha. Uma ususa i-putty powder odongeni odongeni, uyigaye ibe yimpuphu, futhi uyisebenzise futhi, ngeke isebenze ngoba izinto ezintsha (i-calcium carbonate) zenziwe. ) futhi. Izingxenye eziyinhloko ze-ash calcium powder yilezi: ingxube ye-Ca(OH)2, i-CaO nenani elincane le-CaCO3, i-CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Ash calcium isemanzini nasemoyeni Ngaphansi kwesenzo se-CO2, i-calcium carbonate ikhiqizwa, kuyilapho i-HPMC igcina amanzi kuphela, isiza ukusabela okungcono kwe-ash calcium, futhi ayihlanganyeli kunoma yikuphi ukusabela ngokwayo.

9. I-HPMC iyi-ether ye-cellulose engeyona i-ionic, ngakho-ke yini engeyona i-ionic?

Impendulo: Ngokwemigomo ye-layman, i-non-ion iyinto engeke i-ionze emanzini. I-ionization isho inqubo lapho i-electrolyte ihlukaniswa khona ibe ama-ion ashajiwe akwazi ukuhamba ngokukhululeka ku-solvent ethile (njengamanzi, utshwala). Isibonelo, i-sodium chloride (NaCl), usawoti esiwudla nsuku zonke, uncibilika emanzini bese u-ionize ukukhiqiza ama-ion sodium (Na+) ashajwa kahle nama-chloride ions (Cl) ashajwe ngokukhululeka. Okusho ukuthi, lapho i-HPMC ifakwa emanzini, ngeke ihlukaniseke ibe ama-ion ashajiwe, kodwa ibe khona ngendlela yama-molecule.

10. Ingabe kukhona ubudlelwano phakathi kokwehla kwe-putty powder ne-HPMC?

Impendulo: Ukulahlekelwa kwe-powder kwe-putty powder kuhlobene kakhulu nekhwalithi ye-ash calcium, futhi akuhlangene kangako ne-HPMC. I-calcium ephansi ye-calcium empunga kanye nesilinganiso esingalungile se-CaO ne-Ca(OH)2 ku-calcium empunga kuzodala ukulahlekelwa kwempushana. Uma kunokuthile okuphathelene ne-HPMC, khona-ke uma i-HPMC inokugcinwa kwamanzi okungalungile, izophinde ibangele ukulahlekelwa kwempushana.

11. Lihlobene nani izinga lokushisa lejeli le-hydroxypropyl methylcellulose?

Impendulo: Izinga lokushisa lejeli le-HPMC lihlobene nokuqukethwe kwayo kwe-methoxy, ukwehla kokuqukethwe kwe-methoxy↓, kukhuphuka izinga lokushisa lejeli.

12. Ungayikhetha kanjani i-hydroxypropyl methylcellulose (HPMC) efanele ngezinhloso ezahlukene?

Impendulo: Ukusetshenziswa kwe-putty powder: izidingo ziphansi, futhi i-viscosity yi-100,000, okwanele. Okubalulekile wukugcina amanzi kahle. Ukusetshenziswa kodaka: izidingo eziphakeme, i-viscosity ephezulu, i-150,000 ingcono. Ukusetshenziswa kweglue: imikhiqizo esheshayo ene-viscosity ephezulu iyadingeka.

13. Uyini umehluko phakathi kohlobo olusheshayo lwamanzi abandayo kanye nohlobo oluncibilikayo lwe-hydroxypropyl methylcellulose ohlelweni lokukhiqiza?

Impendulo: Uhlobo olusheshayo lwamanzi abandayo lwe-HPMC luphathwa phezulu nge-glyoxal, futhi luhlakazeka ngokushesha emanzini abandayo, kodwa aluncibiliki ngempela. Incibilika kuphela lapho i-viscosity ikhula. Izinhlobo ezincibilikayo ezishisayo aziphathwa nge-glyoxal. Uma inani le-glyoxal likhulu, ukuhlakazeka kuzoshesha, kodwa i-viscosity izokhula kancane, futhi uma inani lincane, okuphambene kuzoba yiqiniso.

14. Liyini iphunga le-hydroxypropyl methylcellulose (HPMC)?

Impendulo: I-HPMC ekhiqizwa indlela ye-solvent isebenzisa i-toluene ne-isopropanol njengezincibilikisi. Uma ukugeza kungalungile kakhulu, kuzoba nephunga elisele.

15. Yiliphi elinye igama le-hydroxypropyl methylcellulose?

Impendulo: Hydroxypropyl Methyl Cellulose, IsiNgisi: Hydroxypropyl Methyl Cellulose Isifinyezo: HPMC noma MHPC Isibizo: Hypromellose; i-cellulose hydroxypropyl methyl ether; I-Hypromellose, i-Cellulose, i-2-hydroxypropyl methyl Cellulose ether. I-Cellulose hydroxypropyl methyl ether Hyprolose.

16. Yini okufanele inakwe ekusetshenzisweni kwangempela kobudlelwane phakathi kwe-viscosity nezinga lokushisa le-HPMC?

Impendulo: I-viscosity ye-HPMC ihambisana ngokuphambene nezinga lokushisa, okusho ukuthi, i-viscosity iyanda njengoba izinga lokushisa liyancipha. I-viscosity yomkhiqizo esivame ukubhekisela kuwo ibhekisela kumphumela wokuhlolwa wesisombululo sawo samanzi esingu-2% ezingeni lokushisa elingu-20 degrees Celsius.

Ekusetshenzisweni okusebenzayo, kufanele kuqashelwe ukuthi ezindaweni ezinomehluko omkhulu wokushisa phakathi kwehlobo nobusika, kunconywa ukusebenzisa i-viscosity ephansi kakhulu ebusika, evumelana kakhulu nokwakhiwa. Uma kungenjalo, lapho izinga lokushisa liphansi, i-viscosity ye-cellulose izokhula, futhi ukuzwa kwesandla kuyoba nzima lapho kukhuhla. I-viscosity ephakathi: 75000-100000 Isetshenziselwa ikakhulukazi i-putty. Isizathu: ukugcinwa kahle kwamanzi. I-viscosity ephezulu: 150000-200000 Ikakhulu isetshenziselwa i-polystyrene izinhlayiyana ezishisayo zokufakelwa udaka i-glue powder kanye ne-vitrified microbead thermal insulation mortar. Isizathu: i-viscosity ephezulu, udaka akulula ukulahla, ukulenga, nokuthuthukisa ukwakhiwa.

17. Ukusetshenziswa kwe-HPMC ku-putty powder, yisiphi isizathu sama-bubbles ku-putty powder?

Impendulo: Ku-putty powder, i-HPMC idlala izindima ezintathu zokuqina, ukugcinwa kwamanzi nokwakha. Ungabambi iqhaza kunoma yikuphi ukusabela. Izizathu zamabhamuza: 1. Faka amanzi amaningi kakhulu. 2. Ungqimba olungezansi alomile, vele uhlubule olunye ungqimba phezulu, futhi kulula ukucweba.