1. Yintoni eyona nto iphambili esetyenziswa ngayoi-hydroxypropyl methylcellulose (HPMC)?
I-HPMC isetyenziswa kakhulu kwizixhobo zokwakha, ii-coating, ii-synthetic resins, ii-ceramics, amayeza, ukutya, amalaphu, ezolimo, izinto zokuthambisa, icuba kunye neminye imboni. I-HPMC inokwahlulwa ibe yi-design grade, food grade kunye ne-pharmacy grade ngokwenjongo. Okwangoku, uninzi lweemveliso zasekhaya zi-design grade. Kwi-design grade, i-putty powder isetyenziswa kakhulu, malunga ne-90% isetyenziselwa i-putty powder, kwaye enye isetyenziselwa i-samente mortar.
2. Lithini ivumba le-hydroxypropyl methylcellulose (HPMC)?
I-HPMC eveliswa yindlela yokunyibilikisa isebenzisa i-toluene kunye ne-isopropanol njengezinyibilikisi. Ukuba ukuhlamba akukuhle kakhulu, kuya kubakho ivumba elishiyekileyo.
3. Ziziphi iindlela zokunyibilikisa i-hydroxypropyl methylcellulose (HPMC)?
Indlela yokunyibilikisa amanzi ashushu: Ekubeni i-HPMC inganyibiliki emanzini ashushu, i-HPMC ingasasazeka ngokulinganayo emanzini ashushu kwinqanaba lokuqala, ize inyibilike ngokukhawuleza xa ipholile. Iindlela ezimbini eziqhelekileyo zichazwe ngolu hlobo lulandelayo:
1) Faka amanzi ashushu afunekayo kwisitya uze uwafudumeze ukuya kuthi ga kwi-70°C. I-hydroxypropyl methylcellulose yongezwa kancinci kancinci xa ixutywa kancinci, ekuqaleni i-HPMC yadada phezu kwamanzi, yaza yakha i-slurry kancinci kancinci, eyapholiswa xa ixutywa.
2), yongeza i-1/3 okanye i-2/3 yobungakanani bamanzi obufunekayo kwisikhongozeli, uze uyifudumeze ukuya kuma-70°C, usasaze i-HPMC ngokwendlela ye-1), uze ulungise i-slurry yamanzi ashushu; uze wongeze amanzi abandayo aseleyo kwi-slurry yamanzi ashushu, umxube upholiswe emva kokuxutywa.
Indlela yokuxuba umgubo: xuba umgubo we-HPMC kunye nezinye izinto ezininzi ezinjengomgubo, xuba kakuhle ngomxube, uze wongeze amanzi ukuze unyibilike, emva koko i-HPMC inokunyibilika ngeli xesha ngaphandle kokuhlanganiswa, kuba kukho i-HPMC encinci kwikona nganye encinci. Umgubo uya kunyibilika ngoko nangoko xa udibana namanzi. ——Abavelisi be-Putty powder kunye ne-mortar basebenzisa le ndlela. [I-Hydroxypropyl methylcellulose (HPMC) isetyenziswa njenge-thickener kunye ne-arhente yokugcina amanzi kwi-putty powder mortar.]
4. Ungawugweba njani umgangatho we-hydroxypropyl methylcellulose (HPMC) ngokulula nangokuqondakalayo?
(1) Ubumhlophe: Nangona ubumhlophe bungenakukwazi ukumisela ukuba kulula na ukusebenzisa i-HPMC, kwaye ukuba kongezwa izinto zokwenza mhlophe ngexesha lenkqubo yemveliso, kuya kuchaphazela umgangatho wayo. Nangona kunjalo, uninzi lweemveliso ezilungileyo zimhlophe kakuhle.
(2) Ubunzima: Ubunzima be-HPMC bune-mesh engama-80 kunye ne-100 mesh, kwaye i-120 mesh incinci. Uninzi lwe-HPMC oluveliswa eHebei lune-mesh engama-80. Okukhona ubuncwane buncinci, ngokubanzi, kokukhona bungcono.
(3) Ukuhanjiswa kokukhanya: bekai-hydroxypropyl methylcellulose (HPMC)emanzini ukuze kwenziwe i-colloid ecacileyo, kwaye ujonge ukuhanjiswa kokukhanya kwawo. Okukhona ukuhanjiswa kokukhanya kukhulu, kokukhona kungcono, okubonisa ukuba akukho zinto zinganyibilikiyo kakhulu kuwo. . Ukuvuleka kwee-reactors ezithe nkqo ngokubanzi kulungile, kwaye oko kwee-reactors ezithe nkqo kubi, kodwa akuthethi ukuba umgangatho wee-reactors ezithe nkqo ungcono kunowee-reactors ezithe nkqo, kwaye umgangatho wemveliso umiselwa zizinto ezininzi.
(4) Ubunzima obuthile: Okukhona ubunzima obuthile bukhulu, kokukhona ubunzima bukhulu. Ubunzima bukhulu, ngokubanzi kuba umxholo weqela le-hydroxypropyl kuyo uphezulu, kwaye umxholo weqela le-hydroxypropyl uphezulu, ukugcinwa kwamanzi kungcono.
5. Yintoni umahluko phakathi kohlobo lwe-cold-water instant kunye nohlobo lwe-hydroxypropyl methylcellulose olunyibilikayo ngokushushu kwinkqubo yokuvelisa?
Uhlobo lwe-HPMC olusasazeka ngokukhawuleza luphathwa nge-glyoxal, kwaye lusasazeka ngokukhawuleza emanzini abandayo, kodwa alunyibiliki ngokwenene. Lunyibilika kuphela xa i-viscosity isanda. Uhlobo olukhawulezileyo alunalo unyango lomphezulu nge-glyoxal. Ukuba ubungakanani be-glyoxal bukhulu, i-dispersion iya kukhawuleza, kodwa i-viscosity iya kunyuka kancinci, kwaye ukuba ubungakanani buncinci, okuchaseneyo kuya kuba yinyani.
6. Ithini i-viscosity efanelekileyo ye-hydroxypropyl methylcellulose (HPMC)?
Umgubo wePutty ngokubanzi yi-100,000 yuan, kwaye iimfuno ze-mortar ziphezulu, kwaye i-150,000 yuan iyafuneka 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 (70,000-80,000), kunokwenzeka. Kakade ke, xa i-viscosity iphezulu, kokukhona i-viscosity iphezulu, kokukhona i-viscosity ingaphezulu kwe-100,000, i-viscosity iya kuchaphazela ukugcinwa kwamanzi. Akusekho kakhulu.
7. Ziziphi izalathisi eziphambili zobugcisa ze-hydroxypropyl methylcellulose (HPMC)?
Ubungakanani be-hydroxypropyl kunye ne-viscosity, uninzi lwabantu luxhalabile ngezi mpawu zimbini. Abo banomxholo we-hydroxypropyl ophezulu bahlala benokugcina amanzi okungcono. Elo linokugcineka kwamanzi okuphezulu linokugcineka ngcono, ngokwentelekiso (hayi ngokupheleleyo), kwaye elo linokugcineka okuphezulu lingcono ukusetyenziswa kwi-samente mortar.
8. Zeziphi izinto eziphambili ze-hydroxypropyl methylcellulose (HPMC)?
Izinto eziphambili ze-hydroxypropyl methylcellulose (HPMC): umqhaphu ocoliweyo, i-methyl chloride, i-propylene oxide, kunye nezinye izinto ezikrwada, i-caustic soda, i-asidi, i-toluene, i-isopropanol, njl.
9. Yintoni umsebenzi ophambili wokusetyenziswa kweI-HPMCkwi-putty powder, kwaye ingaba yenzeka ngokweekhemikhali?
Kwi-putty powder, i-HPMC idlala indima ezintathu zokwandisa ukuqina, ukugcina amanzi kunye nokwakha.
Ukuqina: I-Cellulose ingenziwa ibe nkulu ukuze ixhonywe kwaye igcine isisombululo sihambelana phezulu nasezantsi, kwaye singavumeli ukugoba.
Ukugcinwa kwamanzi: yenza umgubo we-putty wome kancinci, kwaye uncede i-ash calcium ukuba isabele phantsi kwentshukumo yamanzi.
Ulwakhiwo: I-Cellulose inefuthe lokuthambisa, nto leyo enokwenza ukuba umgubo we-putty ube nolwakhiwo oluhle.
Ukongeza amanzi kumgubo we-putty uze uwubeke eludongeni yindlela eyenzeka ngayo ngokwekhemikhali, kuba izinto ezintsha ziyavela. Ukuba ususa umgubo we-putty eludongeni, uwugaye ube ngumgubo, uze uphinde uwusebenzise, awuyi kusebenza kuba izinto ezintsha (i-calcium carbonate) zenziwe.
Izinto eziphambili ze-ash calcium powder zezi: umxube we-Ca(OH)2, i-CaO kunye ne-CaCO3 encinci, i-CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O I-ash calcium ikwi-water and air Phantsi kwe-CO2, i-calcium carbonate iveliswa, ngelixa i-HPMC igcina amanzi kuphela, inceda ukusabela ngcono kwe-ash calcium, kwaye ayithathi nxaxheba kuyo nayiphi na i-reaction ngokwayo.
10. I-HPMC yi-non-ionic cellulose ether, ngoko ke yintoni i-non-ionic?
Ngokwendlela eqhelekileyo, ii-non-ions zizinto ezingayiyo i-ion emanzini. I-ionization ibhekisa kwinkqubo apho i-electrolyte idityaniswe khona ibe zii-ion ezitshajiweyo ezinokuhamba ngokukhululekileyo kwisinyibilikisi esithile (njengamanzi, utywala). Umzekelo, i-sodium chloride (NaCl), ityuwa esiyityayo yonke imihla, iyanyibilika emanzini kwaye i-ionized ukuvelisa ii-ion ze-sodium ezihambayo ngokukhululekileyo (Na+) ezitshajiweyo kakuhle kunye nee-ion ze-chloride (Cl) ezitshajiweyo kakubi. Oko kukuthi, xa i-HPMC ifakwa emanzini, ayizukuhlukana ibe zii-ion ezitshajiweyo, kodwa ikhona kwimo yeemolekyuli.
11. Ingakanani iqondo lobushushu lejeli le-hydroxypropyl methylcellulose 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 kokuthontsiza komgubo we-putty kunye ne-HPMC?
Ukulahleka komgubo we-putty powder kuxhomekeke kakhulu kumgangatho we-ash calcium, kwaye akunanto yakwenza ne-HPMC. Umthamo we-calcium ophantsi we-gray calcium kunye nomlinganiselo ongafanelekanga we-CaO kunye ne-Ca(OH)2 kwi-gray calcium kuya kubangela ukulahleka komgubo. Ukuba inento yokwenza ne-HPMC, ke ukuba i-HPMC ayinamanzi amaninzi, iya kubangela nokulahleka komgubo.
13. Yintoni umahluko phakathi kohlobo lwe-cold-water instant kunye nohlobo lwe-hydroxypropyl methylcellulose olunyibilikayo olushushu kwinkqubo yemveliso?
Uhlobo lokusasazeka ngokukhawulezaI-HPMCInyangwa nge-glyoxal phezu komhlaba, kwaye isasazeka ngokukhawuleza emanzini abandayo, kodwa ayinyibiliki ngokwenene. Iyanyibilika kuphela xa i-viscosity isanda. Uhlobo olukhawulezileyo alunalo unyango lomphezulu nge-glyoxal. Ukuba ubungakanani be-glyoxal bukhulu, i-dispersion iya kukhawuleza, kodwa i-viscosity iya kunyuka kancinci, kwaye ukuba ubungakanani buncinci, okuchaseneyo kuya kuba yinyani.
Ixesha leposi: Epreli-25-2024