Hydroxyethyl Methyl Cellulose (HEMC) inotorwa kubva kune yakasikwa polymer material cellulose. Iyo polymer inonyungudika nemvura yakaumbwa mushure mekugadzirisa kemikari uye ine huwandu hwakawanda hwekushandisa. Seyakakosha mvura-soluble cellulose ether, ine akawanda akasiyana emuviri uye makemikari zvimiro uye inoshandiswa zvakanyanya mukuvaka, machira, zvizorwa, chikafu nemishonga.
1. Chimiro chemakemikari uye kuumbwa
Hydroxyethyl methyl cellulose is a modified cellulose inoumbwa ne etherification reaction ye cellulose ine ethylene oxide (epoxy) uye methyl chloride mushure mekurapwa kwealkali. Chimiro chayo chemakemikari chine cellulose skeleton uye maviri anotsiva, hydroxyethyl uye methoxy. Iko kuiswa kwehydroxyethyl kunogona kuvandudza kunyungudika kwayo kwemvura, nepo kuiswa kwemethoxy kunogona kuvandudza hydrophobicity yayo, zvichiita kuti ive nani kugadzirisa kugadzikana uye kuita kwemafirimu ekugadzira.
2. Solubility
Hydroxyethyl methyl cellulose isiri-ionic cellulose ether ine yakanaka solubility yemvura, inogona kunyungudutswa mumvura inotonhora uye inopisa mvura. Iyo haibatike neiyoni mumvura kana yanyungudika, saka ine yakanakisa solubility pasi pemamiriro akasiyana emvura. Iyo nzira yekuparara inoda kuti iparadzwe zvakaenzana mumvura inotonhora kutanga, uye mushure menguva yekuzvimba, yunifomu uye yakajeka mhinduro inoumbwa zvishoma nezvishoma. Mune organic solvents, HEMC inoratidza kunyungudika kwechikamu, kunyanya mune zvakanyanya polar solvents senge ethanol uye ethylene glycol, iyo inogona kunyungudika zvishoma.
3. Viscosity
Iyo viscosity yeHEMC ndeimwe yeayo akakosha zvivakwa uye inoshandiswa zvakanyanya mukukora, kumiswa uye kugadzira firimu. Viscosity yaro inoshanduka nekuchinja kwekutarisa, tembiricha uye shear rate. Kazhinji, viscosity yemhinduro inowedzera zvakanyanya nekuwedzera kwekugadzirisa kugadzirisa. Mhinduro ine huwandu hwepamusoro inoratidza viscosity yakakwira uye yakakodzera kushandiswa seyakakora yezvivakwa zvekuvaka, machira uye zvinonamira. Mukati meimwe tembiricha yemhando, iyo viscosity yeHEMC mhinduro inodzikira nekuwedzera tembiricha, uye ichi chivakwa chinoita kuti ive yakakodzera kune maindasitiri ekushandisa pasi pemamiriro ekushisa akasiyana.
4. Kugadzikana kwekushisa
Hydroxyethyl methylcellulose inoratidza kugadzikana kwakanaka kwekupisa pakupisa kwakanyanya uye ine kumwe kupikisa kupisa. Kazhinji, pasi pemamiriro ekushisa kwepamusoro (zvakadai sepamusoro pe100 ° C), chimiro chayo che molecular chinenge chakadzikama uye haisi nyore kuora kana kuderedza. Izvi zvinobvumira HEMC kuti ichengetedze kukora kwayo, kuchengetedza mvura uye zvisungo zvekubatanidza munzvimbo dzakanyanya kupisa muindasitiri yekuvaka (senge dhaka rekuomeswa) pasina kusashanda zvakanyanya nekuda kwekushanduka kwekushisa.
5. Kukora
HEMC ine yakanakisa kukora zvivakwa uye inonyatso shanda gobvu iyo inoshandiswa zvakanyanya muakasiyana masisitimu ekugadzira. Inogona kunyatso kuwedzera viscosity yeaqueous mhinduro, emulsions uye suspensions, uye ine yakanaka shear kuonda zvivakwa. Pazviyero zvakaderera zveshear, HEMC inogona kuwedzera zvakanyanya viscosity yehurongwa, nepo pakakwirira shear rates inoratidza yakaderera viscosity, iyo inobatsira kuvandudza nyore kwekushanda panguva yekushandisa. Kuwedzera kwayo mhedzisiro haina hukama nekutarisa chete, asi zvakare inobatwa neiyo pH kukosha uye tembiricha yemhinduro.
6. Kuchengeta mvura
HEMC inowanzoshandiswa semumiriri wekuchengetedza mvura muindasitiri yekuvaka. Kuchengetedzwa kwayo kwemvura kwakanakisa kunogona kurebesa iyo hydration reaction nguva yesimende-yakavakirwa zvinhu uye kunatsiridza mashandiro ekushanda uye kunamatira kwedhaka rekuvaka. Munguva yekuvaka, HEMC inogona kunyatso kudzikisa kurasikirwa kwemvura uye kudzivirira matambudziko akadai sekuputika uye kurasikirwa kwesimba kunokonzerwa nekukurumidza kuoma kwedhaka. Mukuwedzera, mumapendi emvura uye ingi, kuchengetwa kwemvura kweHEMC kunogonawo kuchengetedza mvura yepende, kunatsiridza kugadzirwa kwependi uye kutsetseka kwepamusoro.
7. Biocompatibility uye kuchengeteka
Nekuti HEMC inotorwa kubva kune yakasikwa cellulose, ine yakanaka biocompatibility uye yakaderera chepfu. Naizvozvo, yakashandiswawo zvakanyanya muminda yemishonga uye zvizorwa. Inogona kushandiswa se disintegrant kana kusimudzira-kuburitswa mumiriri mumapiritsi ezvinodhaka kubatsira kugadzikana kuburitswa kwezvinodhaka mumuviri. Uye zvakare, seyakakora uye firimu-inogadzira mumiriri muzvizoro, HEMC inogona kupa kunyorova kweganda, uye kuchengetedzwa kwayo kwakanaka kunoita kuti ive yakakodzera kushandiswa kwenguva refu.
8. Minda yekushandisa
Nekuda kwekuwanda kwemaitiro ehydroxyethyl methylcellulose, yakashandiswa zvakanyanya mumaindasitiri mazhinji:
Indasitiri yekuvaka: Muzvivakwa zvekuvaka senge simende dhaka, putty poda, uye gypsum zvigadzirwa, HEMC inogona kushandiswa seyakakora, inochengetedza mvura mumiriri, uye inonamira kuvandudza mashandiro ekuvaka uye kupera kwechigadzirwa.
Coatings uye ingi: HEMC inoshandiswa zvakanyanya mumvura-based pendi uye ingi seyakakora uye stabilizer yekuvandudza kuenzana, kugadzikana, uye kupenya kwepende mushure mekuoma.
Munda wezvokurapa: Semushonga unoparadza, unonamira uye unoramba uchiburitswa muvatakuri vezvinodhaka, unogona kudzora kuburitswa kwezvinodhaka mumuviri uye kuvandudza bioavailability yemishonga.
Zvizoro uye zvigadzirwa zvekuchengeta pachezvako: Muzvigadzirwa zvekuchengeta zvemunhu senge lotions, makirimu, uye shampoos, HEMC inogona kushandiswa seyakakora uye inonyorovesa, uye ine ganda rakanaka uye bvudzi hukama.
Indasitiri yechikafu: Mune zvimwe zvekudya, HEMC inogona kushandiswa seyakagadzikana, emulsifier uye firimu-inogadzira mumiriri. Kunyange zvazvo kushandiswa kwayo muchikafu kuri pasi pezvirambidzo zvemitemo mune dzimwe nyika, kuchengetedzwa kwayo kwave kuchizivikanwa zvikuru.
9. Kugadzikana kwezvakatipoteredza uye kuora mwoyo
Sezvinhu zvakavakirwa pabio, HEMC inogona kuderedzwa zvishoma nezvishoma munharaunda, uye kushatisa kwayo kunonyanya kuitwa nekuita kwema microorganisms. Naizvozvo, HEMC ine kusvibiswa kushoma kune zvakatipoteredza mushure mekushandisa uye ikemikari ine hushamwari hwezvakatipoteredza. Pasi pemamiriro ezvinhu echisikigo, HEMC inogona kupedzisira yaora mumvura, carbon dioxide uye mamwe mamorekuru maduku, uye haizokonzeri kusvibiswa kwenguva refu muvhu nemvura miviri.
Hydroxyethyl methylcellulose yakakosha mvura-inonyungudika selulosi inotorwa. Nekuda kwekusiyana kwayo kwemuviri nemakemikari zvinhu zvakaita sekukora kwakanakisa, kuchengetedza mvura, kugadzikana kwekupisa uye biocompatibility, inoshandiswa zvakanyanya mumaindasitiri mazhinji akadai sekuvaka, machira, mishonga, zvizorwa, nezvimwewo. yakakosha inoshanda yekuwedzera mune akasiyana masisitimu ekugadzira. Kunyanya mumunda uko kunofanirwa kuwedzera chigadzirwa viscosity, kuwedzera hupenyu hwebasa kana kuvandudza mashandiro ekushanda, HEMC inoita basa risingadzoreki. Panguva imwecheteyo, sechinhu chine hushamwari hwezvakatipoteredza, HEMC yakaratidza kugadzikana kwakanaka mumaindasitiri ekushandisa uye ine tarisiro yakanaka yemusika.
Nguva yekutumira: Sep-27-2024