1. Yintoni eyona nto isetyenziswayo kwiselulosi?
HPMCisetyenziswa kakhulu kwizinto zokwakha, iingubo, iintlaka zokwenziwa, iiseramikhi, amayeza, ukutya, amalaphu, ezolimo, izithambiso, icuba kunye namanye amashishini. I-HPMC inokohlulwa ibe yibakala loshishino, ibakala lokutya kunye nebakala lamayeza ngokwesicelo.
2. Kukho iintlobo ezininzi zeselulosi, kwaye yintoni umahluko ekusebenziseni kwazo?
I-HPMC inokohlulwa ibe ludidi olukhawulezileyo (isimamva segama lebrand “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 ngaphandle ukunyibilika real. Ngokumalunga (ukuvuselela) imizuzu emi-2, i-viscosity ye-liquid iyanda ngokuthe ngcembe, yenza i-colloid emhlophe ebonakalayo. Iimveliso ezincibilikayo ezishushu, xa zidibana namanzi abandayo, ziyakwazi ukusabalalisa ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu. Xa ubushushu buhla kwiqondo elithile lobushushu (ngokobushushu bejeli bemveliso), i-viscosity iya kubonakala ngokukhawuleza ide ifake i-colloid ebonakalayo ebonakalayo.
3. Ziziphi iindlela zokunyibilikisa i-cellulose?
1). Zonke iimodeli zingongezwa kwizinto eziphathekayo ngokuxuba okomileyo;
2). Xa kufuneka yongezwe ngokuthe ngqo kwisisombululo esinamanzi esiqhelekileyo sobushushu, kungcono ukusebenzisa uhlobo lokusasazwa kwamanzi abandayo. Ngokuqhelekileyo kuthatha imizuzu eyi-1 ukuya kwe-30 ukujiya emva kokudibanisa (goqa kwaye ushukumise)
3). Iimodeli eziqhelekileyo ziqala ukuxutywa kwaye zihlakazwe ngamanzi ashushu, zize zichithwe emanzini abandayo emva kokuvuselela nokupholisa;
4). Ukuba i-agglomeration yenzeke ngexesha lokuchithwa, kungenxa yokuba ukuvuselela akwanelanga okanye imodeli eqhelekileyo yongezwa ngokuthe ngqo kumanzi abandayo. Ngeli xesha, kufuneka ixutywe ngokukhawuleza. i
5). Ukuba iibhubhu zenziwe ngexesha lokuchithwa, zinokushiywa ukuba zime iiyure ezingama-2-12 (ixesha elithile lichongwa ngokuhambelana kwesisombululo) okanye lisuswe ngokucoca, ukuxinzelela, njl. i
4. Indlela yokugweba umgangatho we-cellulose ngokulula kunye ne-intuitively?
I-1) Ubumhlophe, nangona ubumhlophe bungenako ukugqiba ukuba i-HPMC ilula ukuyisebenzisa, kwaye ukuba ii-agent ezimhlophe zongezwa kwinkqubo yokuvelisa, iya kuchaphazela umgangatho wayo, kodwa uninzi lweemveliso ezilungileyo zinobumhlophe obuhle.
2) Ukulunga: Ukulunga kweHPMCngokubanzi ine-80 ye-mesh kunye ne-100 ye-mesh, i-120 ye-mesh ingaphantsi, i-coneke icolile ingcono.
3) Ukuhanjiswa kokukhanya: Emva kokuba i-HPMC ifakwe emanzini ukwenza i-colloid ebonakalayo, jonga ukukhanya kwayo. Okukhona ukuhanjiswa kokukhanya, kungcono, kubonisa ukuba kukho izinto ezinganyibilikiyo ezimbalwa kuyo, kwaye ukuhanjiswa kweereactor ezithe nkqo kulungile. , Ireactor ethe tyaba imbi kakhulu, kodwa ayithethi ukuba umgangatho wereactor othe nkqo ungcono kunowo wereactor othe tye, kwaye kukho izinto ezininzi zokumisela umgangatho wemveliso.
4) Umxhuzulane okhethekileyo: Okukhona mkhulu umxhuzulane othile, unzima ngakumbi. Ukuphakama komxhuzulane othile, kokukhona kuphezulu umxholo we-hydroxypropyl kwimveliso. Ukuphakama komxholo we-hydroxypropyl, ngcono ukugcinwa kwamanzi.
5. Yintoni isixa seselulosi kwiputty powder?
Isixa se-HPMC esisetyenzisiweyo kwizicelo eziphathekayo sichatshazelwa yimozulu, ubushushu, umgangatho we-calcium ash ash, i-formula ye-putty powder kunye nomgangatho ofunwa ngabathengi. Kukho ukungafani kwiindawo ezahlukeneyo, ngokuqhelekileyo ukuthetha, kuphakathi kwe-4-5 kg.
6. Yintoni i-viscosity efanelekileyo ye-cellulose?
Ngokubanzi, i-100,000 ye-putty powder yanele, kwaye imfuneko kwidaka iphezulu, kwaye idinga i-150,000 ukuze kube lula ukuyisebenzisa. Ngaphezu koko, owona msebenzi ubalulekileyo we-HPMC kukugcina amanzi, kulandelwa kukuqina. Kwi-putty powder, ngokude nje ukugcinwa kwamanzi kulungile kwaye i-viscosity iphantsi (7-8), inokwenzeka. Ngokuqinisekileyo, ukuphakama kwe-viscosity, ngcono ukugcinwa kwamanzi okuhambelanayo. Xa i-viscosity idlula i-100,000, i-viscosity ayinayo impembelelo ekugcinweni kwamanzi. enkulu.
7. Ziziphi iimpawu eziphambili zezobugcisa ze-cellulose?
Umxholo weHydroxypropyl
Umxholo weMethyl
i-viscosity
Uthuthu
Ilahleko ekomisweni
8. Ziziphi ezona zixhobo ziphambili zeselulosi?
Izinto eziphambili ze-HPMC: umqhaphu ococekileyo, i-methyl chloride, i-propylene oxide, i-liquid caustic soda, njl.
9. Yintoni umsebenzi oyintloko wokusetyenziswa kwe-cellulose kwi-putty powder? Ngaba kukho ukusabela kweekhemikhali?
Phakathi kwe-putty powder, idlala iindima ezintathu zokuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Ukuqina, i-cellulose inokujiya ukuze inqunyanyiswe, gcina isisombululo sifana nqwa phezulu nasezantsi, kwaye umelane nokuhexa. 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.
10. I-Cellulose yi-ether ye-cellulose engekho i-ionic, ngoko yintoni i-non-ionic?
Ngokwemigaqo ye-layman, izinto ezingenayo azithathi nxaxheba kwiikhemikhali.
I-CMC (i-carboxymethyl cellulose) yi-cationic cellulose, ngoko iya kujika ibe yi-curd yembotyi xa idibana nothuthu lwe-calcium.
11 Yintoni iqondo lobushushu lejeli yeselulosi enxulumene nayo?
Ubushushu bejeli ye-HPMC inxulumene nomxholo wayo we-methoxy, umxholo we-methoxy usezantsi, uphezulu ubushushu be-gel.
12. Ngaba kukho ubudlelwane phakathi kokulahlekelwa ngumgubo we-putty powder kunye ne-cellulose?
Kukho ubudlelwane! ! ! Oko kukuthi, ukugcinwa kwamanzi okungahambi kakuhle kwe-HPMC kuya kubangela ukulahlekelwa ngumgubo (umxholo wezinto ezifana nomlotha, i-calcium enzima, kunye nesamente, ubushushu bokwakha, kunye nesimo sodonga kuya kuchaphazeleka zonke).
13. Uthini umahluko phakathi kwamanzi abandayo ngoko nangoko kunye neselulosi enyibilikayo eshushu kwinkqubo yokuvelisa?
Uhlobo lwangoko nangoko lwamanzi abandayo lwe-HPMC lunyangwa 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. Kutheni i-cellulose inevumba?
I-HPMC eveliswa yindlela ye-solvent isebenzisa i-toluene kunye ne-isopropanol njenge-solvents. Ukuba ukuhlamba akulunganga kakhulu, kuya kubakho ivumba elishiyekileyo. (Ukubuyiswa kwe-neutralization yinkqubo ephambili yevumba)
15. Indlela yokukhetha i-cellulose efanelekileyo kwiinjongo ezahlukeneyo?
I-Putty powder: ifuna ukugcinwa kwamanzi aphezulu, ukwakhiwa okulungileyo
Udaka oluqhelekileyo olusekwe kwisamente: lufuna ukugcinwa kwamanzi aphezulu, ukumelana nobushushu obuphezulu, kunye ne-viscosity yangoko
Ukusetyenziswa kweglue yokwakha: iimveliso ezikhawulezayo kunye ne-viscosity ephezulu. (ibanga elicetyiswayo
Udaka lweGypsum: ukugcinwa kwamanzi aphezulu, i-viscosity ephakathi kunye nephantsi, ukunyuka kwe-viscosity kwangoko
16. Leliphi elinye igama leselulosi?
Kubhekiselwa kuyo njenge-HPMC okanye i-MHPC i-alias hypromellose, i-cellulose hydroxypropyl methyl ether.
17. Ukusetyenziswa kwe-cellulose kwi-putty powder, yintoni isizathu se-bubbles kwi-putty powder?
Kwi-putty powder, i-HPMC idlala iindima ezintathu zokuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Izizathu zamaqamu zezi:
1. Amanzi amaninzi ayongezwa.
2. Umaleko ongezantsi awusomile, vele ukhuphe enye ingqimba phezulu, kwaye kulula ukuphosa amagwebu.
18. Yintoni umahluko phakathi kwe-cellulose kunye ne-MC:
I-MC yi-methyl cellulose, eyenziwe nge-ether ye-cellulose ngokunyanga umqhaphu osulungekileyo nge-alkali, usebenzisa i-methane chloride njenge-etherification agent, kwaye ifumana uthotho lweempendulo. Ngokuqhelekileyo, iqondo lokutshintshwa ngu-1.6-2.0, kwaye ukunyibilika kuyahluka ngokwamanqanaba ahlukeneyo okutshintsha. Ngokwahlukileyo, yeye-non-ionic cellulose ether.
(1) Ukugcinwa kwamanzi kwe-methylcellulose kuxhomekeke kwisixa sokongeza, i-viscosity, i-particle fineness kunye nesantya sokuchithwa. Ngokuqhelekileyo, ukuba isixa esongezelelweyo sikhulu, i-fineness incinci, kwaye i-viscosity inkulu, izinga lokugcinwa kwamanzi liphezulu. Phakathi kwabo, isixa esongezelelweyo sinempembelelo enkulu kwizinga lokugcinwa kwamanzi omntu. I-viscosity ayilingani nesantya sokugcinwa kwamanzi. Izinga lokuchithwa ikakhulu lixhomekeke kumphezulu wamasuntswana e-cellulose. Iqondo lokuguqulwa kunye nokucoleka kwamasuntswana. Phakathi kwezi zingentla ze-cellulose ethers, izinga lokugcinwa kwamanzi kwi-methyl cellulose kunye ne-Jinshuiqiao cellulose liphezulu.
(2) I-Methylcellulose iyanyibilika emanzini abandayo, kwaye kuya kuba nzima ukuyinyibilika emanzini ashushu. Isisombululo sayo samanzi sizinzile kakhulu kuluhlu lwe ph=3-12. Inokuhambelana kakuhle kunye nesitashi, njl njl kunye nee-surfactants ezininzi. Xa iqondo lokushisa xa ubushushu be-gelation bufikeleleka, i-gelation iya kwenzeka.
(3) Utshintsho kwiqondo lobushushu luya kuchaphazela kakhulu izinga lokugcinwa kwamanzi kwi-methyl cellulose. Ngokuqhelekileyo, okukhona iqondo lobushushu liphezulu, kokukhona libi kakhulu izinga lokugcinwa kwamanzi. Ukuba ubushushu bomdaka budlula ama-degrees angama-40, ukugcinwa kwamanzi kwe-methyl cellulose kuya kuncitshiswa kakhulu, okuya kuchaphazela kakhulu ukwakhiwa kodaka.
(4)I-Methyl cellulosekunempembelelo ebalulekileyo ekwakhiweni nasekunamatheleni kodaka. Ukuncamathela apha kubhekiselele kumandla okuncamathelisa okuvakala phakathi kwesixhobo sokufaka isicelo somsebenzi kunye nenxalenye yodonga, oko kukuthi, ukuxhathisa kokucheba kodaka. I-adhesiveness iphezulu, ukuxhathisa i-shear yodaka kukhulu, kwaye amandla afunwa ngabasebenzi kwinkqubo yokusetyenziswa nawo mkhulu, kwaye ukusebenza kokwakhiwa kodaka kubi.
Ixesha lokuposa: Apr-25-2024