1. Yintoni eyona nto isetyenziswa kakhulu yi-hydroxypropyl methylcellulose?
I-HPMC isetyenziswa kakhulu kwizixhobo zokwakha, kwiingubo, kwiiresini zokwenziwa, kwiiseramikhi, kumayeza, ekutyeni, kwimpahla, kwezolimo, kwizinto zokuthambisa, kwicuba nakwamanye amashishini. I-HPMC inokwahlulwa ibe ziinqanaba lemizi-mveliso, izinga lokutya kunye nenqanaba leyeza ngokwendlela esetyenziswa ngayo.
2. Kukho iintlobo ezahlukeneyo ze-hydroxypropyl methylcellulose. Yintoni umahluko phakathi kwazo?
I-HPMC inokwahlulwa ibe yi-instant type (isimamva sophawu "S") kunye ne-hot-soluble type. Iimveliso ze-instant type ziyasasazeka ngokukhawuleza emanzini abandayo kwaye zinyamalale emanzini. Ngeli xesha, ulwelo aluna-viscosity kuba i-HPMC isasazeka kuphela emanzini kwaye ayinaso isisombululo sokwenyani. Emva kwemizuzu emi-2 (exutywayo), i-viscosity yolwelo iyanda kancinci kwaye kwenziwa i-viscous colloid ebonakalayo. Iimveliso ezinyibilikayo ezishushu, emanzini abandayo, zinokusasazeka ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu. Xa ubushushu buhla buye kubushushu obuthile (ngokweqondo lobushushu bejeli yemveliso), i-viscosity ibonakala kancinci de kwenziwe i-viscous colloid ebonakalayo neqinileyo.
3. Ziziphi iindlela zesisombululo se-hydroxypropyl methylcellulose?
1. Zonke iimodeli zingongezwa kwizinto ngokuxuba okomileyo;
2. Kufuneka yongezwe ngqo kwisisombululo samanzi esiqhelekileyo sobushushu. Kungcono ukusebenzisa uhlobo lokusasazeka kwamanzi abandayo. Emva kokongeza, idla ngokukhula ibe nkulu kwimizuzu eli-10-90 (vuselela, vuselela, vuselela)
3. Kwiimodeli eziqhelekileyo, xuba uze usasaze ngamanzi ashushu kuqala, uze wongeze amanzi abandayo ukuze anyibilike emva kokuxuba nokuphola.
4. Ukuba ukuhlanganiswa okanye ukusonga kwenzeka ngexesha lokunyibilika, kungenxa yokuba ukuxuba akwanelanga okanye imodeli eqhelekileyo yongezwa ngqo emanzini abandayo. Ngeli xesha, xuba ngokukhawuleza.
5. Ukuba amaqamza enziwa ngexesha lokunyibilika, angashiywa iiyure ezi-2-12 (ixesha elithile lixhomekeke ekuqineni kwesisombululo) okanye asuswe ngokutsalwa kwe-vacuum, ukuxinzelelwa, njl.njl., kwaye ubungakanani obufanelekileyo be-agent yokuxovula bunokongezwa.
4. Ungawugweba njani umgangatho we-hydroxypropyl methylcellulose ngokulula nangokuqondakalayo?
1. Ubumhlophe. Nangona ubumhlophe bungenakukwazi ukugweba ukuba i-HPMC ilungile okanye ayilunganga, kwaye ukongeza ii-agents zokwenza mhlophe ngexesha lenkqubo yemveliso kuya kuchaphazela umgangatho wayo, uninzi lweemveliso ezilungileyo zimhlophe kakuhle.
2. Ubunzima: Ubunzima be-HPMC buhlala buyi-80 mesh kunye ne-100 mesh, ngaphantsi kwe-120, kokukhona incinci kokukhona ingcono.
3. Ukuhanjiswa kokukhanya: I-HPMC yenza i-colloid ecacileyo emanzini. Jonga ukuhanjiswa kokukhanya. Okukhona ukuhanjiswa kokukhanya kukhulu, kokukhona ukuvuleka kokukhanya kungcono, nto leyo ethetha ukuba akukho zinto zinganyibilikiyo kakhulu kuyo. I-reactor ethe nkqo ilungile ngokubanzi, kwaye i-reactor ethe tye iya kukhupha ezinye. Kodwa akunakuthiwa umgangatho wemveliso yeekettle ezithe nkqo ungcono kunoweekettle ezithe tye. Zininzi izinto ezimisela umgangatho wemveliso.
4. Ubunzima obuthile: Okukhona ubunzima obuthile bukhulu, kokukhona ubunzima bungcono. Okukhona ubunzima obuthile bukhulu, kokukhona ubunzima be-hydroxypropyl buphezulu. Ngokubanzi, okukhona ubunzima be-hydroxypropyl buphezulu, kokukhona ukugcinwa kwamanzi kuphezulu.
5. Ingakanani i-hydroxypropyl methylcellulose esetyenziswa kwi-putty powder?
Ubungakanani be-HPMC obusetyenziswayo kwiindlela zokwenyani buyahluka ukusuka kwindawo ukuya kwindawo, ngokubanzi, buphakathi kwe-4-5 kg, kuxhomekeke kwimeko yemozulu, ubushushu, umgangatho we-calcium ash wendawo, ifomula ye-putty powder kunye neemfuno zomgangatho wabathengi.
6. Iyintoni i-viscosity ye-hydroxypropyl methylcellulose?
Umgubo wePutty udla ngokubiza i-RMB 100,000, ngelixa umdaka uneemfuno eziphezulu. Ubiza i-RMB 150,000 ukuze kube lula ukuyisebenzisa. Ngaphezu koko, umsebenzi obaluleke ngakumbi we-HPMC kukugcina amanzi, kulandele ukuqina. Kwi-putty powder, lo gama nje ukugcinwa kwamanzi kulungile kwaye ubuninzi buphantsi (7-8), kunokwenzeka. Kakade ke, okukhona ubuninzi buphezulu, kokukhona ukugcinwa kwamanzi kubhetele. Xa ubuninzi bungaphezulu kwe-100,000, ubuninzi abunampembelelo ingako ekugcinweni kwamanzi.
7. Ziziphi izalathisi eziphambili zobugcisa ze-hydroxypropyl methylcellulose?
Umxholo weHydroxypropyl
Umxholo weMethyl
ukuxinana
Uthuthu
ukunciphisa umzimba owomileyo
8. Zeziphi izinto eziphambili ze-hydroxypropyl methylcellulose?
Izinto eziphambili zeHPMC: umqhaphu ocoliweyo, imethyl chloride, ipropylene oxide, ezinye izinto ezikrwada, i-caustic soda, kunye ne-acid toluene.
9. Ukusetyenziswa kunye nomsebenzi ophambili we-hydroxypropyl methylcellulose kwi-putty powder, ingaba yikhemikhali?
Kwi-putty powder, idlala imisebenzi emithathu ephambili: ukuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Ukuqina kunokwenza i-cellulose ibe nkulu kwaye kudlale indima yokumisa, kugcina isisombululo sihambelana phezulu nasezantsi kwaye kuthintele ukugoba. Ukugcinwa kwamanzi: Yenza i-putty powder yome kancinci kwaye incede i-calcium engwevu ukuba isabele phantsi kwesenzo samanzi. Ukusebenza kakuhle: I-Cellulose inefuthe lokuthambisa, elenza i-putty powder isebenze kakuhle. I-HPMC ayithathi nxaxheba kuyo nayiphi na i-chemical reactions kwaye idlala indima yokuxhasa kuphela.
10. I-Hydroxypropyl methylcellulose yi-non-ionic cellulose ether, ngoko ke yintoni uhlobo lwe-non-ionic?
Ngokubanzi, izinto ezingasebenziyo azibandakanyeki kwiimpendulo zamakhemikhali.
I-CMC (carboxymethylcellulose) yi-cationic cellulose kwaye iya kuba yi-tofu dregs xa idibene ne-calcium ash.
11. Ingakanani iqondo lobushushu lejeli le-hydroxypropyl methylcellulose elinxulumene nayo?
Ubushushu bejeli ye-HPMC bunxulumene nomxholo wayo we-methoxyl. Okukhona umxholo we-methoxyl uphantsi, kokukhona ubushushu bejeli buphezulu.
12. Ngaba kukho ulwalamano phakathi kwe-putty powder kunye ne-hydroxypropyl methylcellulose?
Oku kubalulekile! I-HPMC ayinamanzi amaninzi kwaye iya kubangela ukuba i-powder ibe yipowder.
13. Yintoni umahluko kwinkqubo yokuvelisa phakathi kwesisombululo samanzi abandayo kunye nesisombululo samanzi ashushu se-hydroxypropyl methylcellulose?
Uhlobo olunyibilikayo emanzini abandayo lwe-HPMC lusasazeka ngokukhawuleza emanzini abandayo emva konyango lomphezulu nge-glyoxal, kodwa alunyibiliki ngokwenene. I-viscosity iyanyuka, oko kukuthi, iyanyibilika. Uhlobo olunyibilikayo olushushu alunyangwa ngumphezulu nge-glyoxal. I-Glyoxal inkulu ngobukhulu kwaye isasazeka ngokukhawuleza, kodwa inobukrakra obucothayo kunye nomthamo omncinci, kwaye ngokuchaseneyo.
14. Lithini ivumba le-hydroxypropyl methylcellulose?
I-HPMC eveliswa yindlela yokunyibilikisa yenziwe nge-toluene kunye ne-isopropyl alcohol njengezinyibilikisi. Ukuba ayihlanjwanga kakuhle, kuya kubakho ivumba eliseleyo. (Ukucocwa kunye nokurisayikilisha yinkqubo ebalulekileyo yevumba)
15. Ungayikhetha njani i-hydroxypropyl methylcellulose efanelekileyo yokusetyenziswa ngeendlela ezahlukeneyo?
Umgubo wePutty: Iimfuneko zokugcina amanzi amaninzi kunye nokulula kokwakha (uphawu olucetyiswayo: 7010N)
Udaka oluqhelekileyo olusekelwe kwisamente: ukugcinwa kwamanzi aphezulu, ukumelana nobushushu obuphezulu, ukuxinana kwangoko (umgangatho ocetyiswayo: HPK100M)
Ukusetyenziswa kweglue yokwakha: imveliso ekhawulezileyo, ukuxinana okuphezulu. (Uphawu olucetyiswayo: HPK200MS)
Udaka lweGypsum: ukugcinwa kwamanzi amaninzi, ubuninzi obuphakathi nobuphantsi, ubuninzi obukhawulezileyo (udidi olucetyiswayo: HPK600M)
16. Lithini elinye igama le-hydroxypropyl methylcellulose?
I-HPMC okanye i-MHPC ikwaziwa ngokuba yi-hydroxypropyl methylcellulose kunye ne-hydroxypropyl methylcellulose ether.
17. Ukusetyenziswa kwe-hydroxypropyl methylcellulose kwi-putty powder. Yintoni ebangela ukuba i-putty powder ibe yi-foam?
I-HPMC idlala indima ezintathu eziphambili kwi-putty powder: ukuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Izizathu zeebhamu zezi:
1. Yongeza amanzi amaninzi kakhulu.
2. Ukuba umzantsi awomile, ukukrwela omnye umaleko ngaphezulu kuya kubangela amadyungudyungu lula.
18. Yintoni umahluko phakathi kwe-hydroxypropyl methylcellulose kunye ne-MC:
I-MC, i-methyl cellulose, yenziwe ngekotoni ecociweyo emva konyango lwe-alkali, kusetyenziswa i-methane chloride njenge-etherifying agent, kunye nothotho lweempendulo zokuvelisa i-cellulose ether. Umgangatho oqhelekileyo wokutshintshwa yi-1.6-2.0, kwaye ukunyibilika kwamanqanaba ahlukeneyo okutshintshwa nako kwahlukile. Yi-non-ionic cellulose ether.
(1) Ukugcinwa kwamanzi kwe-methylcellulose kuxhomekeke kubungakanani bayo bokongeza, ukuxinana, ukucoleka kwamasuntswana kunye nesantya sokunyibilika. Ngokubanzi, ubungakanani bokongeza bukhulu, ukucoleka buncinci, ukucoleka buphezulu, kwaye izinga lokugcina amanzi liphezulu. Ubungakanani bokongeza bunempembelelo enkulu kwizinga lokugcina amanzi, kwaye ukucoleka akunanto yakwenza nesantya sokugcina amanzi. Ubungakanani bokunyibilika buxhomekeke kakhulu kwinqanaba lokuguqulwa komphezulu kunye nokucoleka kwamasuntswana e-cellulose. Phakathi kwee-ethers ze-cellulose ezingentla, i-methylcellulose kunye ne-hydroxypropylmethylcellulose zinamazinga aphezulu okugcina amanzi.
(2) I-Methyl cellulose inokunyibilika emanzini abandayo, kodwa iya kujongana nobunzima bokunyibilika emanzini ashushu. Isisombululo sayo samanzi sizinzile kakhulu kuluhlu lwe-pH=3-12, kwaye sihambelana kakuhle nesitatshi kunye nezinye izinto ezininzi ezibangela ukunyibilika. Xa ubushushu bufikelela kwijeli Xa ubushushu bejeli bunyuka, ijeli iya kuvela.
(3) Utshintsho kubushushu luya kuyichaphazela kakhulu izinga lokugcina amanzi le-methylcellulose. Ngokubanzi, xa ubushushu buphezulu, kokukhona izinga lokugcina amanzi lisiba libi. Ukuba ubushushu be-mortar budlula ama-40 degrees, ukugcinwa kwamanzi kwe-methylcellulose kuya kudodobala kakhulu, nto leyo echaphazela kakhulu ukwakhiwa kwe-mortar.
(4) I-Methylcellulose inempembelelo enkulu ekwakhiweni nasekunamatheleni kwe-mortar. Ukunamathela apha kubhekisa ekunamatheleni okuvalekileyo phakathi kwesixhobo sokusebenza somsebenzi kunye nezinto ezisisiseko sodonga, oko kukuthi, ukumelana nokucheba kwe-mortar. Ukunamathela kuphezulu, ukumelana nokucheba kwe-mortar kuphezulu, kwaye amandla afunekayo kubasebenzi ngexesha lokusetyenziswa nawo aphezulu, ngoko ke ukusebenza kokwakha kwe-mortar kuphantsi.
Ixesha leposi: Jan-31-2024