Ziziphi iindlela zokuchithwa kwe-hydroxypropyl methylcellulose HPMC?

1. Ziziphi iindlela zokuchithwa kwe-hydroxypropyl methylcellulose HPMC?

Impendulo: Indlela yokuchithwa kwamanzi ashushu: Ekubeni i-HPMC inganyibiliki emanzini ashushu, i-HPMC inokusasazwa ngokulinganayo emanzini ashushu kwinqanaba lokuqala, kwaye emva koko inyibilike ngokukhawuleza xa ipholile. Iindlela ezimbini eziqhelekileyo zichazwa ngolu hlobo lulandelayo:

1), yongeza i-1/3 okanye i-2/3 yomthamo ofunekayo wamanzi kwisitya, kwaye ushushu ukuya kwi-70 ° C, usasaze i-HPMC ngokwendlela ye-1), kwaye ulungiselele udaka lwamanzi ashushu; uze udibanise umlinganiselo oseleyo wamanzi abandayo kwi-slurry yamanzi ashushu, umxube wapholiswa emva kokuvuselela.

Indlela yokuxuba umgubo: xuba i-HPMC yomgubo kunye nesixa esikhulu sezinye izinto ezinomgubo, xuba ngokucokisekileyo kunye nomxube, uze wongeze amanzi ukuze unyibilike, emva koko i-HPMC inokunyibilika ngeli xesha ngaphandle kokudibanisa, kuba kukho i-HPMC encinci kuphela kuyo yonke into encinci. ikona Powder, iya kunyibilika ngokukhawuleza xa udibana namanzi. ——Umgubo weputty kunye nabavelisi bodaka basebenzisa le ndlela. [I-Hydroxypropyl methylcellulose (HPMC) isetyenziswa njenge-thickener kunye ne-arhente yokugcina amanzi kwi-putty powder mortar.

2) Faka umlinganiselo ofunekayo wamanzi ashushu kwisikhongozeli kwaye ufudumale ukuya kuma 70°C. I-hydroxypropyl methylcellulose yongezwa ngokuthe ngcembe phantsi kokuvuselela okucothayo, ekuqaleni i-HPMC yadada phezu kwamanzi, kwaye ngokuthe ngcembe yenze i-slurry, eyapholiswa phantsi kokuvuselela.

2. Kukho iindidi ezininzi ze-hydroxypropyl methylcellulose HPMC. Yintoni umahluko kusetyenziso lwabo?

Impendulo: I-Hydroxypropyl methylcellulose HPMC inokwahlulwa ibe luhlobo olukhawulezayo kunye nohlobo olushushu lokuchithwa. Iimveliso zohlobo lwe-Instant zisasazeka ngokukhawuleza emanzini abandayo kwaye zinyamalale emanzini. Ngeli xesha, i-liquid ayinayo i-viscosity, kuba i-HPMC ihlakazekile kuphela emanzini, akukho ukunyibilika kwangempela. Malunga nemizuzu emi-2, i-viscosity yolwelo iyanda ngokuthe ngcembe, yenze i-colloid ebonakalayo ebonakalayo. Iimveliso ezincibilikisiweyo ezishushu, xa zidibene namanzi abandayo, ziyakwazi ukusasazeka ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu. Xa iqondo lobushushu lehla ukuya kwiqondo elithile lobushushu, i-viscosity iya kubonakala kancinane ide yenze i-colloid ebonakalayo ebonakalayo. Uhlobo lwe-hot-melt lunokusetyenziswa kuphela kwi-putty powder kunye nodaka. Kwiglue yolwelo kunye nepeyinti, kuya kubakho i-grouping phenomenon kwaye ayinakusetyenziswa. Uhlobo olukhawulezileyo lunoluhlu olubanzi lwezicelo. Ingasetyenziselwa kwi-putty powder kunye nodaka, kunye neglue yamanzi kunye nepeyinti, ngaphandle kokuchasana.

3. Yintoni eyona nto isetyenziswayo ye-hydroxypropyl methylcellulose (HPMC)?

Impendulo: I-HPMC isetyenziswa kakhulu kwizinto zokwakha, iingubo, iireyini zokwenziwa, iiseramikhi, amayeza, ukutya, amalaphu, ezolimo, izithambiso, icuba kunye namanye amashishini. I-HPMC inokohlulwa ibe: ibakala lolwakhiwo, ibakala lokutya kunye nebakala lamayeza ngokokusetyenziswa. Okwangoku, uninzi lweemveliso zasekhaya zikumgangatho wokwakha. Kwibakala lokwakha, i-putty powder isetyenziswe kwisixa esikhulu, malunga ne-90% isetyenziselwa i-putty powder, kwaye intsalela isetyenziselwa udaka lwesamente kunye neglue.

4. Indlela yokugweba umgangatho we-hydroxypropyl methylcellulose (HPMC) ngokulula kunye ne-intuitively?

Impendulo: (1) Umxhuzulane okhethekileyo: Okukhona umkhulu umxhuzulane othile, kokukhona unzima ngakumbi. Umlinganiselo mkhulu, ngokubanzi ngenxa yokuba

(2) Ubumhlophe: Nangona ubumhlophe bungenako ukugqiba ukuba i-HPMC ilula ukuyisebenzisa, kwaye ukuba i-agent emhlophe yongezwa ngexesha lenkqubo yokuvelisa, iya kuchaphazela umgangatho wayo. Nangona kunjalo, uninzi lweemveliso ezilungileyo zinobumhlophe obuhle.

(3) Ukulunga: Ukulunga kwe-HPMC ngokubanzi kune-80 mesh kunye ne-100 mesh, kunye ne-120 mesh ingaphantsi. Uninzi lwe-HPMC eveliswe eHebei yi-80 mesh. Okukhona ukucoleka, kokukhona kungcono ngokubanzi.

(4) Ukuhanjiswa kokukhanya: faka i-hydroxypropyl methylcellulose (HPMC) emanzini ukwenza i-colloid ebonakalayo, kwaye ukhangele ukukhanya kwayo. Ukuphakama kokuhanjiswa kokukhanya, kungcono, kubonisa ukuba kukho i-insolubles encinci kuyo. . Ukungeneka kwereactor ethe nkqo ngokuqhelekileyo kulungile, kwaye okwereactor ethe tye kubi, kodwa ayithethi ukuba umgangatho wereactor eme nkqo ungcono kunalowo wereactor ethe tye, kwaye kukho izinto ezininzi zokumisela umgangatho wemveliso. . Umxholo weqela le-hydroxypropyl kuwo liphezulu, kwaye umxholo weqela le-hydroxypropyl liphezulu, kwaye ukugcinwa kwamanzi kungcono.

5. Ziziphi iimpawu eziphambili zezobugcisa ze-hydroxypropyl methylcellulose (HPMC)?

Impendulo: Umxholo we-Hydroxypropyl kunye ne-viscosity, abaninzi abasebenzisi banenkxalabo malunga nezi zikhombisi zimbini. Abo banomxholo ophezulu we-hydroxypropyl ngokubanzi banokugcinwa kwamanzi okungcono. I-viscosity ephezulu, ukugcinwa kwamanzi, ngokulinganayo (kunokuba

6. Yintoni i-viscosity efanelekileyo ye-hydroxypropyl methylcellulose (HPMC)?

Impendulo: I-Putty powder ngokuqhelekileyo yi-yuan eyi-100,000, kwaye iimfuno zodaka ziphezulu, kwaye kulula ukusebenzisa i-yuan eyi-150,000. Ngaphezu koko, owona msebenzi ubalulekileyo we-HPMC kukugcina amanzi, kulandelwa kukuqina. Kwi-putty powder, ngokude nje ukugcinwa kwamanzi kulungile kwaye i-viscosity iphantsi (i-70,000-80,000), nayo inokwenzeka. Ngokuqinisekileyo, ukuphakama kwe-viscosity, ngcono ukugcinwa kwamanzi okuhambelanayo. Xa i-viscosity idlula i-100,000, i-viscosity iya kuchaphazela ukugcinwa kwamanzi. Akusekho kakhulu. Ngokuqinisekileyo) kungcono, kwaye i-viscosity iphezulu, kwaye kungcono ukuyisebenzisa kwi-samente yodaka.

7. Ziziphi ezona zixhobo ziphambili ze-hydroxypropyl methylcellulose (HPMC)?

Impendulo: Izinto eziphambili ze-hydroxypropyl methylcellulose (HPMC): i-cotton ecocekileyo, i-methyl chloride, i-propylene oxide, kunye nezinye izinto eziluhlaza, i-caustic soda, i-asidi, i-toluene, i-isopropanol, njl.

8. Yintoni umsebenzi oyintloko wokusetyenziswa kwe-HPMC kwi-putty powder, kwaye ngaba kwenzeka ngamakhemikhali?

Impendulo: Kwi-putty powder, i-HPMC idlala iindima ezintathu zokuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Ukutyebisa: Iselulosi inokujiya ukuze inqunyanyiswe kwaye igcine iyunifomu yesisombululo inyuka naphantsi, kwaye imelane nokudodobala. Ukugcinwa kwamanzi: yenza i-putty powder yome kancinci, kwaye uncedise i-calcium yothuthu ukuba isabele phantsi kwesenzo samanzi. Ukwakhiwa: I-Cellulose inefuthe lokuthambisa, elinokwenza ukuba i-putty powder ibe nokwakhiwa kakuhle. I-HPMC ayithathi nxaxheba kuyo nayiphi na intshukumo yeekhemikhali, kodwa idlala indima encedisayo kuphela. Ukongeza amanzi kwi-putty powder kunye nokuyibeka eludongeni kukusabela kweekhemikhali, kuba izinto ezintsha zenziwe. Ukuba ususa i-putty powder eludongeni eludongeni, ugaye ube ngumgubo, kwaye uyisebenzise kwakhona, ayiyi kusebenza ngenxa yokuba izinto ezintsha (i-calcium carbonate) zenziwe. ) nayo. Amacandelo aphambili omgubo we-ash calcium zezi: umxube weCa(OH)2, iCaO kunye nesixa esincinci seCaCO3, CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Ash calcium emanzini nasemoyeni Ngaphantsi kwesenzo se-CO2, i-calcium carbonate yenziwe, ngelixa i-HPMC igcina amanzi kuphela, incedisa ukusabela okungcono kwe-ash calcium, kwaye ayithathi nxaxheba kuyo nayiphi na impendulo ngokwayo.

9. I-HPMC yi-ether ye-cellulose engekho i-ionic, ngoko ke yintoni i-non-ionic?

Impendulo: Ngokwemigaqo ye-layman, i-non-ion yinto engayi ku-ayoni emanzini. Ionization ibhekisela kwinkqubo apho i-electrolyte idityaniswe kwii-ion ezihlawulisiweyo ezinokuhamba ngokukhululekile kwi-solvent ethile (njengamanzi, utywala). Ngokomzekelo, i-sodium chloride (NaCl), ityuwa esiyidla yonke imihla, inyibilika emanzini kwaye i-ionizes ukuvelisa i-ion ze-sodium ezihamba ngokukhululekileyo (Na +) ezihlawuliswa kakuhle kunye ne-chloride ion (Cl) ehlawuliswa kakubi. Oko kukuthi, xa i-HPMC ifakwe emanzini, ayiyi kuhlukana kwii-ion ezihlawulisiweyo, kodwa zikhona ngendlela yeemolekyuli.

10. Ngaba kukho ubudlelwane phakathi kokuhla kwe-putty powder kunye ne-HPMC?

Impendulo: Ukulahlekelwa ngumgubo we-putty powder kuhambelana ikakhulu nomgangatho we-ash calcium, kwaye ayinanto encinci ne-HPMC. Umxholo ophantsi we-calcium we-gray calcium kunye nomlinganiselo ongafanelekanga we-CaO kunye ne-Ca (OH) i-2 kwi-gray calcium iya kubangela ukulahleka kwepowder. Ukuba inento yokwenza ne-HPMC, ngoko ukuba i-HPMC inokugcinwa kwamanzi okungahambi kakuhle, kuya kubangela ukulahlekelwa ngumgubo.

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

Impendulo: Ubushushu bejeli ye-HPMC inxulumene nomxholo wayo we-methoxy, i-methoxy content↓ iphantsi, iqondo lokushisa eliphezulu le-gel.

12. Indlela yokukhetha i-hydroxypropyl methylcellulose (HPMC) efanelekileyo ngeenjongo ezahlukeneyo?

Impendulo: Ukusetyenziswa kwe-putty powder: iimfuno zincinci, kwaye i-viscosity yi-100,000, eyaneleyo. Into ebalulekileyo kukugcina amanzi kakuhle. Ukusetyenziswa komdaka: iimfuno eziphezulu, i-viscosity ephezulu, i-150,000 ingcono. Ukusetyenziswa kweglue: iimveliso ezikhawulezayo ezine-viscosity ephezulu ziyafuneka.

13. Uthini umahluko phakathi kohlobo olukhawulezayo lwamanzi abandayo kunye nohlobo olunonyibiliko olushushu lwe-hydroxypropyl methylcellulose kwinkqubo yokuvelisa?

Impendulo: Uhlobo olukhawulezayo lwamanzi abandayo lwe-HPMC luphathwa phezulu nge-glyoxal, kwaye lusasazeka ngokukhawuleza emanzini abandayo, kodwa alunyibiliki ngokwenene. Ichithwa kuphela xa i-viscosity inyuka. Iintlobo ezishushu ezinyibilikayo aziphathwa ngomphezulu nge-glyoxal. Ukuba inani le-glyoxal likhulu, ukusabalalisa kuya kukhawuleza, kodwa i-viscosity iya kwanda ngokukhawuleza, kwaye ukuba isixa sincinci, okuchaseneyo kuya kuba yinyani.

14. Yintoni ivumba le-hydroxypropyl methylcellulose (HPMC)?

Impendulo: I-HPMC eveliswa yindlela ye-solvent isebenzisa i-toluene kunye ne-isopropanol njenge-solvents. Ukuba ukuhlamba akulunganga kakhulu, kuya kubakho ivumba elishiyekileyo.

15. Leliphi elinye igama le-hydroxypropyl methylcellulose?

Impendulo: Hydroxypropyl Methyl Cellulose, IsiNgesi: Hydroxypropyl Methyl Cellulose Isifinyezo: HPMC okanye MHPC Alias: Hypromellose; i-cellulose hydroxypropyl methyl ether; I-Hypromellose, iSelulosi, i-2-hydroxypropyl methyl Cellulose ether. I-Cellulose hydroxypropyl methyl ether Hyprolose.

16. Yintoni ekufuneka iqwalaselwe kwisicelo sokwenene sobudlelwane phakathi kwe-viscosity kunye nobushushu be-HPMC?

Impendulo: I-viscosity ye-HPMC ihambelana ngokungafaniyo neqondo lokushisa, oko kukuthi, i-viscosity iyanda njengoko iqondo lokushisa liyancipha. I-viscosity yemveliso esidla ngokubhekisela kuyo ibhekiselele kwisiphumo sovavanyo lwesisombululo sayo se-aqueous ye-2% kwiqondo lokushisa lama-20 degrees Celsius.

Kwizicelo eziphathekayo, kufuneka kuqatshelwe ukuba kwiindawo ezinomahluko omkhulu weqondo lokushisa phakathi kwehlobo nobusika, kucetyiswa ukuba kusetyenziswe i-viscosity ephantsi kakhulu ebusika, ehambelana nokwakhiwa. Ngaphandle koko, xa iqondo lokushisa liphantsi, i-viscosity ye-cellulose iya kwanda, kwaye ukuvakalelwa kwesandla kuya kuba nzima xa kukhuhla. I-viscosity ephakathi: 75000-100000 Isetyenziswa kakhulu kwi-putty. Isizathu: ukugcinwa kakuhle kwamanzi. I-viscosity ephezulu: 150000-200000 Ikakhulu isetyenziselwa i-polystyrene particle thermal insulation mortar glue powder and vitrified microbead thermal insulation mortar. Isizathu: i-viscosity ephezulu, udaka alulula ukulahla, ukuxhoma, kunye nokuphucula ukwakhiwa.

17. Ukusetyenziswa kwe-HPMC kwi-putty powder, yintoni isizathu se-bubbles kwi-putty powder?

Impendulo: Kwi-putty powder, i-HPMC idlala iindima ezintathu zokuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Musa ukuthatha inxaxheba kuzo naziphi na iimpendulo. Izizathu zamaqamza: 1. Beka amanzi amaninzi kakhulu. 2. Umaleko ongezantsi awusomile, vele ukhuphe enye ingqimba phezulu, kwaye kulula ukuphosa amagwebu.