1. Yintoni eyona nto isetyenziswa kakhulu yi-cellulose?
I-HPMCIsetyenziswa kakhulu kwizixhobo zokwakha, iipeyinti, iiresini zokwenziwa, iiseramikhi, amayeza, ukutya, amalaphu, ezolimo, izinto zokuthambisa, icuba kunye neminye imimandla. I-HPMC inokwahlulwa ibe yi-industrial grade, i-food grade kunye ne-pharmacy grade ngokwesicelo.
2. Kukho iintlobo ezahlukeneyo ze-cellulose, kwaye yintoni umahluko kwindlela ezisetyenziswa ngayo?
I-HPMC inokwahlulwa ibe yi-instant type (isimamva segama lophawu "S") kunye ne-hot-melt type. Iimveliso ze-instant type zisasazeka ngokukhawuleza emanzini abandayo kwaye zinyamalale emanzini. Ngeli xesha, ulwelo aluna-viscosity kuba i-HPMC isasazeka kuphela emanzini ngaphandle kokunyibilika ngokwenene. Malunga (ukuxuba) imizuzu emi-2, i-viscosity yolwelo iyanda kancinci kancinci, yenze i-colloid emhlophe ebonakalayo ne-viscous. Iimveliso ze-hot-melt, xa zidibana namanzi abandayo, zinokusasazeka ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu. Xa ubushushu buhla buye kubushushu obuthile (ngokweqondo lobushushu bejeli yemveliso), i-viscosity iya kubonakala kancinci ide yenze i-viscous colloid ebonakalayo.
3. Ziziphi iindlela zokunyibilikisa i-cellulose?
1). Zonke iimodeli zingongezwa kwizinto ngokuxuba okomileyo;
2). Xa kufuneka yongezwe ngqo kwisisombululo samanzi esiqhelekileyo kubushushu obuqhelekileyo, kungcono ukusebenzisa uhlobo lokusasazeka kwamanzi abandayo. Ngokuqhelekileyo kuthatha imizuzu eli-1 ukuya kwengama-30 ukuba iqine emva kokuyongeza (vuselela kwaye uvuselele)
3). Iimodeli eziqhelekileyo ziqala zixutywe kwaye zisasazwe ngamanzi ashushu, emva koko zinyibilikiswe emanzini abandayo emva kokuxutywa nokuphola;
4). Ukuba ukuhlangana kwenzeka ngexesha lokunyibilika, kungenxa yokuba ukuxuba akwanelanga okanye imodeli eqhelekileyo yongezwa ngqo emanzini abandayo. Ngeli xesha, kufuneka ixutywe ngokukhawuleza.
5). Ukuba amaqamza enziwa ngexesha lokunyibilika, angashiywa eme iiyure ezi-2-12 (ixesha elithile limiselwa kukuhambelana kwesisombululo) okanye asuswe ngokutshiza nge-vacuum, ngokucinezela, njl.njl., kwaye ubungakanani obufanelekileyo be-agent yokuxovula bunokongezwa.
4. Ungawugweba njani umgangatho we-cellulose ngokulula nangokungacwangciswanga?
1) Ubumhlophe, nangona ubumhlophe bungenakukwazi ukumisela ukuba kulula na ukusebenzisa i-HPMC, kwaye ukuba kongezwa ii-agents zokwenza mhlophe kwinkqubo yemveliso, kuya kuchaphazela umgangatho wayo, kodwa uninzi lweemveliso ezilungileyo zimhlophe kakuhle.
2) Ubuhle: Ubuhle beI-HPMCngokubanzi ine-mesh engama-80 kunye ne-100 mesh, i-120 mesh incinci, okukhona incinci kokukhona incinci, kokukhona incinci.
3) Ukuhanjiswa kokukhanya: Emva kokuba i-HPMC ibekwe emanzini ukuze yenze i-colloid ecacileyo, jonga ukuhanjiswa kwayo kokukhanya. Okukhona ukuhanjiswa kokukhanya kukhulu, kokukhona kungcono, okubonisa ukuba akukho zinto zinganyibilikiyo kakhulu kuyo, kwaye ukuhanjiswa kwee-reactors ezithe nkqo ngokubanzi kulungile. , I-reactor ethe tye imbi kakhulu, kodwa akuthethi ukuba umgangatho we-reactor ethe tye ungcono kunowe-reactor ethe tye, kwaye kukho izinto ezininzi ezimisela umgangatho wemveliso.
4) Ubunzima obuthile: Okukhona ubunzima obuthile bukhulu, kokukhona ubunzima bungcono. Okukhona ubunzima obuthile buphezulu, kokukhona ubunzima be-hydroxypropyl buphezulu kwimveliso. Okukhona ubunzima be-hydroxypropyl buphezulu, kokukhona ukugcinwa kwamanzi kuphezulu.
5. Ingakanani i-cellulose kwi-putty powder?
Ubungakanani be-HPMC obusetyenziswayo kwiindlela ezisebenzayo buchaphazeleka yimozulu, ubushushu, umgangatho we-ash calcium yasekuhlaleni, ifomula ye-putty powder kunye nomgangatho ofunekayo kubathengi. Kukho umahluko kwiindawo ezahlukeneyo, ngokubanzi, uphakathi kwe-4-5 kg.
6. Ingakanani i-viscosity efanelekileyo ye-cellulose?
Ngokubanzi, i-100,000 putty powder yanele, kwaye imfuneko kwi-mortar iphezulu, kwaye ifuna i-150,000 ukuze kube lula ukuyisebenzisa. Ngaphezu koko, owona msebenzi ubalulekileyo we-HPMC kukugcina amanzi, kulandele ukuqina. Kwi-putty powder, ukuba nje ukugcinwa kwamanzi kulungile kwaye i-viscosity iphantsi (7-8), kunokwenzeka. Kakade ke, xa i-viscosity iphezulu, kokukhona i-viscosity iphezulu, kokukhona i-viscosity ingaphezulu kwe-100,000, i-viscosity ayinampembelelo ekugcinweni kwamanzi.
7. Ziziphi izalathisi eziphambili zobugcisa ze-cellulose?
Umxholo weHydroxypropyl
Umxholo weMethyl
ukuxinana
Uthuthu
Ilahleko yokomisa
8. Zeziphi izinto eziphambili ze-cellulose?
Izinto eziphambili zeHPMC: umqhaphu ocoliweyo, imethyl chloride, ipropylene oxide, i-liquid caustic soda, njl.
9. Yintoni umsebenzi ophambili wokusetyenziswa kwe-cellulose kwi-putty powder? Ngaba kukho nayiphi na i-chemical reaction?
Phakathi komgubo we-putty, udlala indima ezintathu zokutyeba, ukugcinwa kwamanzi kunye nokwakhiwa. Ukutyeba, i-cellulose inokwenza i-putty iqine ukuze imise, igcine isisombululo sihambelana phezulu nasezantsi, kwaye imelane nokuwa. Ukugcinwa kwamanzi: yenza umgubo we-putty wome kancinci, kwaye uncede i-ash calcium ukuba isabele phantsi kwesenzo samanzi. Ukwakhiwa: I-Cellulose inefuthe lokuthambisa, elinokwenza umgubo we-putty ube nokwakhiwa okuhle. I-HPMC ayithathi nxaxheba kuyo nayiphi na i-chemical reactions, kodwa idlala indima yokuncedisa kuphela.
10. I-Cellulose yi-non-ionic cellulose ether, ngoko ke yintoni i-non-ionic?
Ngokwembono yabantu nje, izinto ezingasebenziyo azinanxaxheba kwiimpendulo zamakhemikhali.
I-CMC (carboxymethyl cellulose) yi-cationic cellulose, ngoko ke iya kuba yi-bean curd xa idibana ne-ash calcium.
11 Ingakanani iqondo lobushushu bejeli yeselilulose elinxulumene nayo?
Ubushushu bejeli ye-HPMC bunxulumene nomxholo wayo we-methoxy, okukhona umxholo we-methoxy uphantsi, kokukhona ubushushu bejeli buphezulu.
12. Ngaba kukho ulwalamano phakathi kokulahleka komgubo we-putty powder kunye ne-cellulose?
Kukho ubudlelwane! ! ! Oko kukuthi, ukugcinwa kwamanzi okungekuhle kwe-HPMC kuya kubangela ukulahleka komgubo (umxholo wezinto ezifana nothuthu, i-calcium eninzi, kunye nesamente, ubushushu bokwakhiwa, kunye nesimo sodonga konke kuya kuchaphazeleka).
13. Yintoni umahluko phakathi kwe-cold water instant kunye ne-hot soluble cellulose kwinkqubo yemveliso?
Uhlobo lwe-HPMC olusebenzisa amanzi abandayo ngokukhawuleza lunyangwa nge-glyoxal, kwaye lusasazeka ngokukhawuleza emanzini abandayo, kodwa alunyibiliki ngokwenene. Lunyibilika kuphela xa i-viscosity isanda. Iintlobo ze-hot melt azinyangwa nge-glyoxal kumphezulu. Ukuba ubungakanani be-glyoxal bukhulu, i-dispersion iya kukhawuleza, kodwa i-viscosity iya kunyuka kancinci, kwaye ukuba ubungakanani buncinci, okuchaseneyo kuya kuba yinyani.
14. Kutheni i-cellulose inevumba elimnandi?
I-HPMC eveliswa yindlela yokunyibilikisa isebenzisa i-toluene kunye ne-isopropanol njengezinyibilikisi. Ukuba ukuhlamba akukuhle kakhulu, kuya kubakho ivumba elishiyekileyo. (Ukubuyiselwa kwevumba yinkqubo ephambili yevumba)
15. Ungayikhetha njani i-cellulose efanelekileyo ngeenjongo ezahlukeneyo?
Umgubo wePutty: ufuna amanzi amaninzi agcinwe kakuhle, kulula ukwakhiwa
Udaka oluqhelekileyo olusekelwe kwisamente: lufuna ukugcinwa kwamanzi aphezulu, ukumelana nobushushu obuphezulu, kunye nokuxinana kwangoko
Ukusetyenziswa kweglue yokwakha: iimveliso ezikhawulezileyo ezine-viscosity ephezulu. (umgangatho ocetyiswayo
Udaka lweGypsum: ukugcinwa kwamanzi amaninzi, ubuninzi obuphakathi nobuphantsi, ukwanda kobunzima obukhawulezileyo
16. Liliphi elinye igama le-cellulose?
Ezibizwa ngokuba yi-HPMC okanye i-MHPC elias hypromellose, i-cellulose hydroxypropyl methyl ether.
17. Ukusetyenziswa kwe-cellulose kwi-putty powder, yintoni isizathu sokuba kubekho amaqamza kwi-putty powder?
Kwi-putty powder, i-HPMC idlala indima ezintathu zokwandisa ukuqina, ukugcina amanzi kunye nokwakha. Izizathu zezi:
1. Amanzi amaninzi kakhulu ayongezwa.
2. Umaleko ongezantsi awomile, khwehlela nje omnye umaleko ngaphezulu, kwaye kulula ukuwufaka igwebu.
18. Yintoni umahluko phakathi kwe-cellulose kunye ne-MC:
I-MC yi-methyl cellulose, eyenziwe nge-cellulose ether ngokunyanga umqhaphu ocoliweyo nge-alkali, kusetyenziswa i-methane chloride njenge-etherification agent, kwaye idlula kwiimpendulo ezininzi. Ngokubanzi, inqanaba lokutshintshwa yi-1.6-2.0, kwaye ukunyibilika kuyahluka ngokwamanqanaba ahlukeneyo okutshintshwa. Ngokwahlukileyo, ikwi-non-ionic cellulose ether.
(1) Ukugcinwa kwamanzi kwe-methylcellulose kuxhomekeke kubungakanani bayo bokongeza, i-viscosity, ubunono beentwana kunye nesantya sokunyibilika. Ngokubanzi, ukuba ubungakanani bokongeza bukhulu, ubunono buncinci, kwaye i-viscosity inkulu, izinga lokugcina amanzi liphezulu. Phakathi kwazo, ubungakanani bokongeza bunempembelelo enkulu kwisantya sokugcina amanzi ebantwini. I-viscosity ayilingani nesantya sokugcina amanzi. Isantya sokunyibilika sixhomekeke kakhulu kumphezulu weentwana ze-cellulose. Ubungakanani bokuguqulwa kunye nobunono beentwana. Phakathi kwee-ethers ezininzi ze-cellulose ezingentla, izinga lokugcina amanzi le-methyl cellulose kunye ne-Jinshuiqiao cellulose liphezulu.
(2) I-Methylcellulose iyanyibilika emanzini abandayo, kwaye kuya kuba nzima ukuyinyibilikisa emanzini ashushu. Isisombululo sayo samanzi sizinzile kakhulu kuluhlu lwe-ph=3-12. Ihambelana kakuhle nesitatshi, njl. kunye nezinye izinto ezininzi ezibangela ukuxinana. Xa kushushu Xa kufikelele kubushushu be-gelation, kuya kwenzeka i-gelation.
(3) Utshintsho kubushushu luya kuchaphazela kakhulu izinga lokugcina amanzi le-methyl cellulose. Ngokubanzi, xa ubushushu buphezulu, kokukhona izinga lokugcina amanzi liba libi. Ukuba ubushushu be-mortar budlula ama-40 degrees, ukugcinwa kwamanzi kwe-methyl cellulose kuya kuncipha kakhulu, nto leyo eya kuchaphazela kakhulu ukwakhiwa kwe-mortar.
(4)I-Methyl celluloseinefuthe elikhulu ekwakhiweni nasekunamatheleni kwe-mortar. Ukuncamathelisa apha kubhekisa kumandla okuncamathelisa avakalayo phakathi kwesixhobo sokusebenzisa somsebenzi kunye ne-substrate yodonga, oko kukuthi, ukumelana nokucheba kwe-mortar. Ukuncamathelisa kuphezulu, ukumelana nokucheba kwe-mortar kukhulu, kwaye amandla afunekayo kubasebenzi kwinkqubo yokusetyenziswa nawo makhulu, kwaye ukusebenza kokwakhiwa kwe-mortar kuphantsi.
Ixesha leposi: Epreli-25-2024