Mayelana ne-Hydroxypropyllylylylylylylyllose

1. Yini ukusetshenziswa okuyinhloko kwe-cellulose?

I-HPMC isetshenziswa kabanzi ezintweni zokwakha, ukumboza, ama-desin okwenziwa, ama-ceramics, umuthi, ukudla, izindwangu, amazweli, ugwayi kanye nezinye izimboni. I-HPMC ingahlukaniswa iba ibanga lezimboni, ibanga lokudla kanye nebanga lemithi ngokuya ngesicelo.

2. Kunezinhlobo eziningana ze-cellulose, futhi yini umehluko ekusebenziseni kwazo?

I-HPMC ingahlukaniswa ngohlobo olusheshayo (igama legama legama lomkhiqizo "s") nohlobo olushisayo. Imikhiqizo yohlobo olusheshayo isabalala ngokushesha emanzini abandayo futhi inyamalala emanzini. Ngalesi sikhathi, uketshezi alunakubonakala ngoba i-HPMC ihlakazeka kuphela emanzini ngaphandle kokuchithwa kwangempela. Mayelana (okuvuselelayo) imizuzu emi-2, i-viscosity yoketshezi inyuka kancane kancane, yakha i-colloid emhlophe ekhanyayo. Imikhiqizo eshisayo ehlekisayo, lapho ihlangabezana namanzi abandayo, ingahlakazeka ngokushesha emanzini ashisayo bese inyamalala emanzini ashisayo. Lapho amazinga okushisa ehla emazingeni okushisa athile (ngokushisa kwe-gel yomkhiqizo), i-viscosity izovela kancane ize ifike lapho kwakha i-colloid esobala ye-viscous.

3. Iziphi izindlela zokuqeda i-cellulose?

1). Wonke amamodeli angangezwa kokuqukethwe ngokuxuba owomile;

2). Lapho idinga ukufakwa ngqo kwisisombululo esijwayelekile samanzi samanzi okushisa, kungcono ukusebenzisa uhlobo lokuhlakazeka kwamanzi olubandayo. Imvamisa kuthatha imizuzu eyi-1-30 ukuqina ngemuva kokungeza (kuvuse futhi uvuse)

3). Amamodeli ajwayelekile avuselelwa okokuqala futhi ahlakazeka ngamanzi ashisayo, abese echithwe emanzini abandayo ngemuva kokuvusa nokupholisa;

4). Uma i-agglomeration yenzeka ngesikhathi sokuchithwa, kungenxa yokuthi ukushukumisa kunganele noma imodeli ejwayelekile ingezwe ngqo emanzini abandayo. Ngalesi sikhathi, kufanele kuvuswe ngokushesha. le khasi

5). Uma ama-bubble akhiqizwa ngesikhathi sokuchithwa, angashiywa ukuze ame amahora angama-2-12 (isikhathi esithile sinqunywa ngokuguquguquka kwesisombululo) noma asuswe yi-vacuing, ucindezele, futhi inani elifanele le-defouming angezwa. le khasi

4. Ungahlulela kanjani ikhwalithi ye-cellulose kalula futhi enembile?

1) Ubumsulwa, yize ubumsulwa bungeke bunqume ukuthi ngabe i-HPMC kulula ukuyisebenzisa, futhi uma kufakwa ama-anchents amhlophe kwinqubo yokukhiqiza, kuzothinta ikhwalithi yawo, kepha iningi lemikhiqizo emihle limhlophe.

2) Ubuciko: Ubumsulwa be-HPMC ngokuvamile bunama-mesh angama-80 ne-100 mesh, ama-mesh ayi-120 aphansi, ahle kakhulu.

3) Ukuhamba okukhanyayo: Ngemuva kokuthi i-HPMC ibekwe emanzini ukwakha i-colloid esobala, bheka ukudluliselwa kwayo okukhanyayo. Lapho kukhudlwana okukhanyayo okukhanyayo, okungcono, okubonisa ukuthi kunezihlakala ezingaphansi kwalo, futhi ukudluliselwa kwama-reactors mpo ngokuvamile kulungile. , I-Reactor evundlile imbi kakhulu, kepha akusho ukuthi ikhwalithi ye-reactoror mpo ingcono kunaleyo yokuphendula okuvundlile, futhi kunezici eziningi zokuthola ikhwalithi yomkhiqizo.

4) Ubungako Obuthile: Kukhudlwana amandla adonsela phansi athile, okusindayo kube ngcono. Ukuphakama kwamandla adonsela phansi okuthile, okuphezulu okuqukethwe kwe-hydroxypropyl kuMkhiqizo. Okuqukethwe okuphezulu kwe-hydroxypropyl, okungcono ukugcinwa kwamanzi.

I-5. Inani le-cellulose ku-putty powder?

Inani le-HPMC elisetshenziswe ezinceku ezisebenzayo lithintwa yisimo sezulu, izinga lokushisa, ikhwalithi ye-Ash calcium yasendaweni, ifomula ye-putty powder nekhwalithi edingwa amakhasimende. Kunokwehluka ezindaweni ezahlukahlukene, ngokuvamile ukukhuluma, kuphakathi kuka-4-5 kg.

6. Yini i-viscosity efanele ye-cellulose?

Ngokuvamile, i-100,000 putty powder yanele, futhi imfuneko edonswayo iphakeme, futhi idinga u-150,000 ukuze kube lula ukuyisebenzisa. Ngaphezu kwalokho, umsebenzi obaluleke kakhulu we-HPMC ukugcinwa kwamanzi, kulandelwa ukuqina. Ku-putty powder, inqobo nje uma ukugcinwa kwamanzi kuhle futhi i-viscosity iphansi (7-8), kungenzeka futhi. Vele, ukukhuphuka okuphezulu, kungcono ukugcinwa kwamanzi okuhlobene. Lapho i-viscosity yeqa i-100,000, i-viscosity ayinamthelela ekugcinweni kwamanzi. omkhulu.

7. Yiziphi izinkomba zobuchwepheshe eziphambili ze-cellulose?

Okuqukethwe kwe-hydroxypropyl

Okuqukethwe kwe-methyl

ukuhlakanipha

Umlotha

Ukulahleka kokuwomile

8. Yiziphi izinto eziphambili ezingavuthiwe ze-cellulose?

Izinto zokusetshenziswa eziphambili ze-HPMC: ukotini ocwengiwe, i-methyl chloride, i-propelene oxide, uketshezi we-caustic soda, njll.

9. Uyini umsebenzi oyinhloko wokusetshenziswa kwe-cellulose ku-putty powder? Ingabe kukhona ukusabela kwamakhemikhali?

Phakathi kwe-putty powder, idlala izindima ezintathu zokuqina, ukugcinwa kwamanzi nokwakha. Ukuqina, i-cellulose ingakhula ukumisa, gcina umfaniswano wesisombululo unyuke phezulu naphansi, futhi umelane nokugcwala. Ukugcinwa kwamanzi: yenza i-putty powder eyomile kancane, futhi isize i-ash calcium ukuze usabele ngaphansi kwesenzo samanzi. Ukwakhiwa: I-Cellulose inomphumela wokuthambisa, okungenza i-Putty Powder ibe nokwakhiwa okuhle. I-HPMC ayihlanganyeli kunoma yikuphi ukusabela kwamakhemikhali, kepha idlala indima ebalulekile.

I-10

Ngokwemigomo ka-Lamberman, izinto ezi-inert azihlanganyeli ekuphendukeni kwamakhemikhali.

I-CMC (i-carboxymethyl celtuleose) iyi-cellulose ye-cationes, ngakho-ke izophenduka ibe yi-bean curd lapho ihlangana ne-ash calcium.

11 Yiliphi izinga lokushisa le-gel le-cellulose elihlobene nalo?

Izinga lokushisa le-gel le-HPMC lihlobene nokuqukethwe kwalo methoxy, okuqukethwe kwe-methoxy, okuphezulu kwe-gel lokushisa.

12. Ngabe kukhona ubudlelwano phakathi kokulahleka kwempuphu kwe-putty powder kanye ne-cellulose?

Kunobudlelwano! ! ! Okungukuthi, ukugcinwa kwamanzi okumpofu kwe-HPMC kuzodala ukulahleka kwempuphu (okuqukethwe kwezinto ezifana nomlotha, i-calcium esindayo, kanye nesimende, izinga lokushisa lodonga sonke lizothinteka).

13. Uyini umehluko phakathi kwamanzi abandayo ngokushesha kanye ne-at atluble cellulose yenqubo yokukhiqiza?

Uhlobo lwamanzi olubandayo olusheshayo lwe-HPMC luphathwa yi-glyxical, futhi luhlakazeka ngokushesha emanzini abandayo, kepha alinciphise ngempela. Kuncibilika kuphela lapho i-viscosity inyuka. Izinhlobo ezishisayo zeMelt aziphathwa yi-glyxal. Uma inani le-Gyoxal likhulu, ukuhanjiswa kuzoshesha, kepha ukubonwa kuzokhuphuka kancane, futhi uma inani lincane, okuphambene nalo kuzoba iqiniso.

14. Kungani i-cellulose inephunga?

I-HPMC ekhiqizwa yi-solvent indlela isebenzisa i-toluene ne-isopropanol njenge-solvents. Uma ukugeza kungakuhle kakhulu, kuzoba nephunga elisalelayo. (Ukuvuselelwa kokungathathi hlangothi kuyinqubo ebalulekile yephunga)

15. Ungayikhetha kanjani iselula efanele ngezinhloso ezihlukile?

I-PuTTY Powder: Dinga ukugcinwa kwamanzi okuphezulu, ukululama okuhle

Udaka olususelwa olimende olujwayelekile: kudinga ukugcinwa kwamanzi okuphezulu, ukumelana okushisa okuphezulu, nokuvunywa ngokushesha

Ukusetshenziswa kwe-glue yokwakha: imikhiqizo esheshayo enokubonakala okuphezulu. (ibanga elinconyiwe

UGenty Portar: Ukugcinwa kwamanzi okuphezulu, ukubonakala okuphakathi nendawo okuphansi, ukwanda okusheshayo okusheshayo

16. Iliphi elinye igama leselula le-cellulose?

Kubizwa ngokuthi yi-HPMC noma i-MHPC Alias ​​Hypromellose, i-CelLose Hydroxypypropyll methyl ether.

17. Ukusetshenziswa kwe-cellulose ku-putty powder, yisiphi isizathu sama-bubble ku-putty powder?

Ku-putty powder, i-HPMC idlala izindima ezintathu zokuqina, ukugcinwa kwamanzi nokwakha. Izizathu zama-bubble yilezi:

1. Kunezelwa amanzi amaningi.

2

18. Uyini umehluko phakathi kweselula ne-MC:

I-MC iyi-mettyl cellulose, eyenziwe nge-cellulose ether ngokola ukotini ocwengekile nge-alkali, usebenzisa i-methane chloride njenge-ejenti yokusheshisa, futhi ibhekana nochungechunge lokuphendula. Ngokuvamile, izinga lokufaka esikhundleni ngu-1.6-2.0, kanye ne-solubality liyahlukahluka ngamazinga ahlukene wokufaka esikhundleni. Okuhlukile, kungokwangeyena e-ether engeyona eye-cellulose.

. Ngokuvamile, uma inani lokungeza likhulu, ubuciko buncane, futhi i-viscoty inkulu, inani lokugcina lamanzi liphezulu. Phakathi kwazo, inani lokungeza linomthelela omkhulu kumanani okugcinwa kwamanzi womuntu. I-viscosity ayifani ngokulingana namazinga okugcina amanzi. Izinga lokuchithwa ikakhulukazi lincike ebusweni bezinhlayiya zeselula. Degree of ukuguqulwa kanye nobumsulwa bezinhlayiyana. Phakathi kwalokhu okungenhla kwezibalo ze-celluLose, inani lokugcina lamanzi le-methyl cellulose kanye ne-jinshuiiaiao cellulose liphezulu.

(2) I-methylcellulose incanela emanzini abandayo, futhi kuzoba nzima ukuncibilika emanzini ashisayo. Isixazululo saso samanzi sizinzile kakhulu ebangeni le-PH = 3-12. Inokuhambisana okuhle nesitashi, njll. Futhi ama-surfactants amaningi. Lapho izinga lokushisa lapho izinga lokushisa le-gelation lifinyelelwa, kuzokwenzeka.

(3) Izinguquko zokushisa zizothinta kakhulu isilinganiso sokugcinwa kwamanzi se-methyl cellulose. Ngokuvamile, izinga lokushisa eliphakeme, elibi kakhulu inani lokugcina amanzi. Uma izinga lokushisa lodaka lidlula ama-degree angama-40, ukugcinwa kwamanzi kwe-methyl cellulose kuzoncishiswa kakhulu, okuzothinta kakhulu ukwakhiwa kodaka.

(4) I-methyl cellulose inomthelela omkhulu ekwakhiweni nasekunamathiselwe kodaka. Adhesion lapha kubhekiswa emandleni anamathela azwakala phakathi kwethuluzi lesisebenzi soMfakisicelo kanye ne-Wallstrate yodonga, okungukuthi, ukumelana nokugula kodaka ngodaka. Ukunamathelayo kuphakeme, ukumelana nokukhula kodaka kukhulu, futhi amandla afunwa yizisebenzi ezisezinhlelweni zokusebenzisa nawo akhulu, futhi ukusebenza kodaka kumpofu.