Funda malunga ne-hydroxypropyl methylcellulose

1. Yintoni eyona nto isetyenziswayo ye-hydroxypropyl methylcellulose?

I-HPMC isetyenziswa ngokubanzi kwizinto zokwakha, iingubo, ii-resin zokwenziwa, iiseramikhi, amayeza, ukutya, amalaphu, ezolimo, izithambiso, icuba kunye namanye amashishini.I-HPMC inokohlulwa ibe kwibakala loshishino, ibakala lokutya kunye nebakala lamayeza ngokokusetyenziswa kwayo.

2. Kukho iindidi ezininzi ze-hydroxypropyl methylcellulose.Nguwuphi umahluko phakathi kwabo?

I-HPMC inokohlulwa ibe luhlobo olukhawulezileyo (isimamva sophawu “S”) kunye nodidi olunyibilikayo olushushu.Iimveliso zohlobo olukhawulezayo zisasazeka ngokukhawuleza emanzini abandayo kwaye zinyamalale emanzini.Ngeli xesha, ulwelo akukho viscosity kuba HPMC isasazwe kuphela emanzini kwaye akukho isisombululo lokwenene.Emva malunga (ukuvuselela) imizuzu emi-2, i-viscosity yolwelo ikhula ngokukhawuleza kwaye i-colloid ye-viscous ebonakalayo yenziwa.Iimveliso ezishushu ezinyibilikayo, emanzini abandayo, zinokusasazeka ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu.Xa ubushushu behla kwiqondo elithile lobushushu (ngokwejeli yobushushu bemveliso), i-viscosity ibonakala ngokukhawuleza de i-colloid ebonakalayo kunye ne-viscous yenziwe.

3. Ziziphi iindlela zesisombululo se-hydroxypropyl methylcellulose?

1. Zonke iimodeli zingongezwa kwizinto eziphathekayo ngokuxuba okomileyo;

2. Kufuneka ifakwe ngokuthe ngqo kwisisombululo se-aqueous yeqondo lokushisa eliqhelekileyo.Kungcono ukusebenzisa uhlobo lokusasazwa kwamanzi abandayo.Emva kokongeza, ihlala ifikelela ekushubeni ngaphakathi kwemizuzu eyi-10-90 (xuba, xuba, xuba)

3. Kwiimodeli eziqhelekileyo, ugxobhoze kwaye usasaze ngamanzi ashushu kuqala, uze ungeze amanzi abandayo ukuze uchithe emva kokuvuselela nokupholisa.

4. Ukuba i-agglomeration okanye ukusonga kwenzeka ngexesha lokuchithwa, kungenxa yokuba ukuvuselela akwanelanga okanye imodeli eqhelekileyo yongezwa ngokuthe ngqo kumanzi abandayo.Ngeli xesha, xuba ngokukhawuleza.

5. Ukuba iibhulu zenziwe ngexesha lokuchithwa, zingashiywa kwiiyure ezingama-2-12 (ixesha elithile lixhomekeke ekungqineni kwesisombululo) okanye zisuswe nge-vacuum extraction, i-pressurization, njl. kongezwa.

4. Indlela yokugweba umgangatho we-hydroxypropyl methylcellulose ngokulula nangengqiqo?

1. Ubumhlophe.Nangona ubumhlophe bungenakugweba ukuba i-HPMC ilungile okanye hayi, kwaye ukongeza iiarhente ezimhlophe ngexesha lenkqubo yemveliso kuya kuchaphazela umgangatho wayo, uninzi lweemveliso ezilungileyo zinobumhlophe obuhle.

2. Ukulunga: Ukulunga kweHPMC ngokuqhelekileyo yi-80 mesh kunye ne-100 mesh, ngaphantsi kwe-120, i-fineness ingcono.

3. Ukuhanjiswa kokukhanya: I-HPMC yenza i-colloid ecacileyo emanzini.Jonga ukuhanjiswa kokukhanya.Okukhona ukuhanjiswa kokukhanya, kokukhona kungeneka, nto leyo ethetha ukuba kukho izinto ezincinci ezinganyibilikiyo kuyo.Ireactor ethe nkqo ilungile gabalala, kwaye ireactor ethe tye iya kukhupha ezinye.Kodwa akunakutshiwo ukuba umgangatho wemveliso yeeketile ezithe nkqo ungcono kuneeketile ezithe tye.Kukho izinto ezininzi ezimisela umgangatho wemveliso.

4. Umxhuzulane okhethekileyo: Okukhona umkhulu umxhuzulane othile, kokukhona unzima ngakumbi.Okukhona mkhulu umxhuzulane othile, kokukhona umxholo we-hydroxypropyl uphezulu.Ngokubanzi, okukhona uphezulu umxholo we-hydroxypropyl, kokukhona ukugcinwa kwamanzi ngcono.

5. Ingakanani i-hydroxypropyl methylcellulose esetyenziswa kwi-putty powder?

Isixa se-HPMC esisetyenziswe kwizicelo ezichanekileyo siyahluka ukusuka kwindawo ukuya kwindawo, ukuthetha ngokubanzi, kuphakathi kwe-4-5 kg, ngokuxhomekeke kwimeko yemozulu, ubushushu, umgangatho we-calcium ash yendawo, i-putty powder formula kunye neemfuno zomgangatho womthengi.

6. Yintoni i-viscosity ye-hydroxypropyl methylcellulose?

I-Putty powder ngokubanzi ixabisa i-RMB 100,000, ngelixa udaka luneemfuno eziphezulu.Ixabisa i-RMB 150,000 ukuze kube lula ukuyisebenzisa.Ngaphezu koko, owona msebenzi ubalulekileyo we-HPMC kukugcina amanzi, kulandele ukujiya.Kwi-putty powder, ngokude nje ukugcinwa kwamanzi kulungile kwaye i-viscosity iphantsi (7-8), inokwenzeka.Ngokuqinisekileyo, i-viscosity enkulu, ngcono ukugcinwa kwamanzi okuhambelanayo.Xa i-viscosity ingaphezulu kwe-100,000, i-viscosity inefuthe elincinci ekugcinweni kwamanzi.

7. Ziziphi iimpawu eziphambili zezobugcisa ze-hydroxypropyl methylcellulose?

Umxholo weHydroxypropyl

Umxholo weMethyl

i-viscosity

Uthuthu

ilahleko ubunzima owomileyo

8. Ziziphi ezona zixhobo ziphambili ze-hydroxypropyl methylcellulose?

Izinto eziphambili ze-HPMC: umqhaphu ococekileyo, i-methyl chloride, i-propylene oxide, ezinye izinto eziluhlaza, i-caustic soda, kunye ne-acid toluene.

9. Ukusetyenziswa kunye nomsebenzi oyintloko we-hydroxypropyl methylcellulose kwi-putty powder, ngaba yimichiza?

Kwi-putty powder, idlala imisebenzi emithathu emikhulu: ukuqina, ukugcinwa kwamanzi kunye nokwakhiwa.Ukujiya kungenza i-cellulose ibe ngqindilili kwaye idlale indima yokuxhoma, ukugcina isisombululo sifana phezulu nasezantsi kwaye kuthintele ukudodobala.Ukugcinwa kwamanzi: Yenza iputty powder yome kancinci kwaye uncedise i-calcium engwevu ukuba isabele phantsi kwesenzo samanzi.Ukusebenza: I-Cellulose inefuthe lokuthambisa, eyenza i-putty powder ibe nokusebenza kakuhle.I-HPMC ayithathi nxaxheba kuyo nayiphi na imichiza kwaye idlala indima exhasayo kuphela.

10. I-Hydroxypropyl methylcellulose i-ether ye-cellulose engekho i-ionic, ngoko ke yintoni uhlobo lwe-non-ionic?

Ngokuqhelekileyo, izinto ezingenamsebenzi azithathi nxaxheba kwiikhemikhali.

I-CMC (i-carboxymethylcellulose) yi-cationic cellulose kwaye iya kujika ibe yi-tofu dregs xa ibonakaliswe kuthuthu lwe-calcium.

11. Yintoni ubushushu bejeli ye-hydroxypropyl methylcellulose enxulumene nayo?

Ubushushu bejeli ye-HPMC inxulumene nomxholo wayo we-methoxyl.Ukunciphisa umxholo we-methoxyl, uphezulu ubushushu bejeli.

12. Ngaba kukho ubudlelwane phakathi kwe-putty powder kunye ne-hydroxypropyl methylcellulose?

Oku kubalulekile!I-HPMC inokugcina amanzi okulambathayo kwaye iya kubangela umgubo.

13. Uthini umahluko kwinkqubo yokuvelisa phakathi kwesisombululo samanzi abandayo kunye nesisombululo samanzi ashushu se-hydroxypropyl methylcellulose?

Uhlobo lwe-HPMC olunyibilikayo lwamanzi abandayo lusasazwa ngokukhawuleza kumanzi abandayo emva konyango lomphezulu nge-glyoxal, kodwa alunyibiliki ngokwenene.I-viscosity iphakama, oko kukuthi, iyancibilika.Uhlobo olushushu oluncibilikayo aluphathwanga ngomphezulu nge-glyoxal.I-Glyoxal inkulu ngobukhulu kwaye isasazeke ngokukhawuleza, kodwa ine-viscosity ecothayo kunye nevolumu encinci, kunye nelinye icala.

14. Yintoni ivumba le-hydroxypropyl methylcellulose?

I-HPMC eveliswa yindlela yokunyibilikisa yenziwe nge-toluene kunye ne-isopropyl alcohol njengezinyibilikisi.Ukuba ayihlanjwanga kakuhle, kuya kubakho ivumba elishiyekileyo.(Ukungathathi hlangothi kunye nokuhlaziywa kwakhona yinkqubo ephambili yevumba)

15. Indlela yokukhetha i-hydroxypropyl methylcellulose efanelekileyo yokusetyenziswa okuhlukeneyo?

Umgubo wePutty: iimfuno zokugcina amanzi aphezulu kunye noncedo oluhle lolwakhiwo (uphawu olucetyiswayo: 7010N)

Udaka oluqhelekileyo olusekelwe kwisamente: ukugcinwa kwamanzi aphezulu, ukumelana nobushushu obuphezulu, i-viscosity ekhawulezileyo (ibakala elicetyiswayo: HPK100M)

Ukusetyenziswa kwe-adhesive yokwakha: imveliso esheshayo, i-viscosity ephezulu.(Ibrendi ecetyiswayo: HPK200MS)

I-Gypsum mortar: ukugcinwa kwamanzi aphezulu, i-viscosity ephakathi-phantsi, i-viscosity esheshayo (ibakala elicetyiswayo: HPK600M)

16. Liliphi elinye igama le-hydroxypropyl methylcellulose?

I-HPMC okanye i-MHPC ikwabizwa ngokuba yi-hydroxypropyl methylcellulose kunye ne-hydroxypropyl methylcellulose ether.

17. Ukusetyenziswa kwe-hydroxypropyl methylcellulose kwi-putty powder.Yintoni ebangela ukuba umgubo ube ugwebu?

I-HPMC idlala iindima ezintathu ezinkulu kwi-putty powder: ukuqina, ukugcinwa kwamanzi kunye nokwakhiwa.Izizathu zamaqamza zezi:

1. Yongeza amanzi amaninzi kakhulu.

2. Ukuba umzantsi awomile, ukukrazula omnye umaleko ngaphezulu kuya kubangela amadyungudyungu ngokulula.

18. Uthini umahluko phakathi kwe-hydroxypropyl methylcellulose kunye ne-MC:

I-MC, i-methyl cellulose, yenziwe kwikotoni esulungekileyo emva konyango lwe-alkali, isebenzisa i-methane chloride njenge-agent etherifying, kunye nochungechunge lweempendulo zokuvelisa i-cellulose ether.Iqondo eliqhelekileyo lokutshintshwa kwe-1.6-2.0, kunye ne-solubility yeedigri ezahlukeneyo zokutshintshwa kwakhona kuyahluka.Yi-ether ye-cellulose engeyiyo ionic.

(1) Ukugcinwa kwamanzi kwe-methylcellulose kuxhomekeke kwisixa sokongeza, i-viscosity, i-particle fineness kunye nesantya sokuchithwa.Ngokuqhelekileyo, isixa sokongeza sikhulu, ukucoleka kuncinci, i-viscosity iphezulu, kwaye izinga lokugcinwa kwamanzi liphezulu.Isixa esongezelelweyo sinempembelelo enkulu kwizinga lokugcinwa kwamanzi, kwaye i-viscosity ayinanto yokwenza nesantya sokugcinwa kwamanzi.Isantya sokuchithwa sixhomekeke ikakhulu kwiqondo lokuguqulwa komphezulu kunye ne-particle fineness ye-cellulose particleness.Phakathi kwezi zingentla ze-cellulose ethers, i-methylcellulose kunye ne-hydroxypropylmethylcellulose zinezinga eliphezulu lokugcinwa kwamanzi.

(2) I-Methyl cellulose inokuchithwa emanzini abandayo, kodwa iya kudibana nobunzima bokuchithwa emanzini ashushu.Isisombululo saso samanzi sizinzile kakhulu kuluhlu lwe-pH = 3-12, kwaye luhambelana kakuhle nesitashi kunye nabaninzi be-surfactants.Xa iqondo lokushisa lifikelela kwi-gel Xa ukushisa kwe-gelation kunyuka, i-gelation iya kwenzeka.

(3) Utshintsho lobushushu luya kuchaphazela kakhulu izinga lokugcinwa kwamanzi kwi-methylcellulose.Ngokuqhelekileyo, okukhona iqondo lobushushu liphezulu, kokukhona libi kakhulu izinga lokugcinwa kwamanzi.Ukuba ubushushu bomdaka budlula ama-degrees angama-40, ukugcinwa kwamanzi kwe-methylcellulose kuya kuhlahloka kakhulu, kuchaphazele kakhulu ukwakhiwa kodaka.

(4) I-Methylcellulose inempembelelo ebalulekileyo ekwakhiweni nasekunamatheleni komdaka.Ukunamathela apha kubhekiselele ekunamatheleni okuvakalelwa phakathi kwesixhobo sesicelo somsebenzi kunye nesiseko sodonga, oko kukuthi, ukuxhathisa kwe-shear yodaka.Ukubambelela kuphezulu, ukuxhathisa kwe-shear yodaka kuphezulu, kwaye amandla afunwa ngabasebenzi ngexesha lokusetyenziswa nawo aphezulu, ngoko ukusebenza kokwakhiwa kodaka kubi.