Kugadzira hydroxyethyl cellulose (HEC) kunosanganisira maitiro akasiyana-siyana emakemikari ekugadzirisa cellulose, iyo polymer yechisikigo inobva mumiti. HEC inoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana, anosanganisira mishonga, zvizoro, chikafu, uye kuvaka, nekuda kwehunhu hwayo hwekukora, kugadzikana, uye kuchengetedza mvura.
Nhanganyaya kuHydroxyethyl Cellulose (HEC)
Hydroxyethyl cellulose (HEC) ipolymer isinganyungudike mumvura, inonyungudika kubva mu cellulose kuburikidza nekuchinja kwemakemikari. Inoshandiswa zvakanyanya semushonga wekukora, wekuisa gelling, uye wekusimbisa muindasitiri dzakasiyana-siyana.
Zvishandiso Zvisina Kugadzirwa
Cellulose: Chinhu chikuru chekugadzira HEC. Cellulose inogona kuwanikwa kubva muzvinhu zvakasiyana-siyana zvinobva mumiti zvakaita sehuni, donje, kana masara ekurima.
Ethylene Oxide (EO): Kemikari inokosha inoshandiswa kuunza mapoka ehydroxyethyl kumusana we cellulose.
Alkali: Kazhinji sodium hydroxide (NaOH) kana potassium hydroxide (KOH) inoshandiswa sechinhu chinobatsira pakuita kwechinhu ichi.
Maitiro Ekugadzira
Kugadzirwa kweHEC kunosanganisira etherification ye cellulose ne ethylene oxide pasi pemamiriro e alkaline.
Matanho anotevera anotsanangura maitiro acho:
1. Kurapwa kweCellulose usati watanga
Cellulose inotanga yacheneswa kubvisa tsvina yakaita se lignin, hemicellulose, nezvimwe zvinoburitsa tsvina. Cellulose yakacheneswa inozoomeswa kusvika yanyatsosvika pahunyoro hwakati.
2. Maitiro eEtherification
Kugadzirwa kweAlkaline Solution: Mhinduro yemvura yesodium hydroxide (NaOH) kana potassium hydroxide (KOH) inogadzirwa. Kuwanda kwealkali solution kwakakosha uye kunoda kugadziriswa zvichienderana nehuwandu hwekuchinjana (DS) hwechigadzirwa chekupedzisira.
Kugadzika Kwemhinduro: Cellulose yakachena inoparadzirwa mumushonga wealkali. Musanganiswa wacho unodziiswa kusvika patembiricha chaiyo, kazhinji inenge 50-70°C, kuitira kuti cellulose ivimbe zvakakwana uye ive nyore kushandisa.
Kuwedzera Ethylene Oxide (EO): Ethylene oxide (EO) inowedzerwa zvishoma nezvishoma mumudziyo we reaction uku ichichengetedza tembiricha uye ichikurunga nguva dzose. Reaction yacho inotonhora zvakanyanya, saka kudzora tembiricha kwakakosha kudzivirira kupisa zvakanyanya.
Kutarisa Maitiro Emuviri: Kufambira mberi kwemaitiro emuviri kunoongororwa nekuongorora masampuli nguva nenguva. Matekiniki akaita seFourier-transform infrared spectroscopy (FTIR) anogona kushandiswa kuona mwero wekutsiva (DS) kwemapoka ehydroxyethyl pamusana we cellulose.
Kubvisa Kusvibiswa Uye Kusukwa: Kana DS inodiwa yawanikwa, mhinduro yacho inodzimwa nekudzima mvura yealkaline neacid, inowanzova acetic acid. HEC inozobva yagezwa zvakanaka nemvura kubvisa chero zvinhu zvisina kugadzikana uye tsvina.
3. Kuchenesa uye Kuomesa
HEC yakagezwa inocheneswa zvakare kuburikidza nekusefa kana kutenderera kuti ibvise tsvina yasara. HEC yakacheneswa inozoomeswa kusvika yanyatsonaka kuti iwane chigadzirwa chekupedzisira.
Kudzora Hunhu
Kudzora mhando kwakakosha panguva yekugadzira HEC kuti ive nechokwadi chekuti chigadzirwa chekupedzisira chakagadzirwa zvakanaka uye chakachena. Zvinhu zvakakosha zvekutarisa zvinosanganisira:
Dhigirii rekutsiva (DS)
Kusviba
Hunyoro
pH
Kuchena (kusava netsvina)
Matekiniki ekuongorora akadai seFTIR, kuyera viscosity, uye ongororo yezvinhu zvinowanzo shandiswa kudzora mhando.
Kushandiswa kweHydroxyethyl Cellulose (HEC)
HEC inowana mashandisirwo mumaindasitiri akasiyana-siyana nekuda kwehunhu hwayo hunoshandiswa zvakasiyana-siyana:
Mishonga: Inoshandiswa semushonga unosimbisa ganda mumishonga inonwiwa, mishonga inoiswa pamusoro, uye nzira dzekupa mishonga inoburitswa nemutemo.
Zvizoro: Zvinowanzoshandiswa mumakirimu, mafuta ekuzora, uye shampoos sechinosimbisa uye chinosimbisa ganda.
Chikafu: Chinowedzerwa muzvigadzirwa zvekudya sechinhu chinosimbisa uye chinoita kuti chiwedzere kukora, chinosimbisa, uye chinosimbisa kukora.
Kuvaka: Kunoshandiswa mumadhaka nemagrout akagadzirwa nesimende kuvandudza kushanda zvakanaka uye kuchengetedza mvura.
Kufunga Nezvezvakatipoteredza uye Kuchengetedzeka
Kukanganiswa Kwezvakatipoteredza: Kugadzirwa kweHEC kunosanganisira kushandiswa kwemakemikari akadai se ethylene oxide ne alkalis, izvo zvinogona kukanganisa nharaunda. Kutarisira marara nemazvo uye kutevedzera mitemo kwakakosha kuderedza kukanganisa nharaunda.
Kuchengetedzwa: Ethylene oxide igasi rinobatidza moto zvakanyanya, rinokonzera njodzi dzekuchengetedza panguva yekubata nekuchengetedza. Kufefetera kwakakwana, michina yekudzivirira munhu (PPE), uye nzira dzekuchengetedza zvinodiwa kuti vashandi vachengetedzeke.
Hydroxyethyl cellulose (HEC) ipolymer inokosha ine mashandisirwo akasiyana-siyana mumaindasitiri kubva kumishonga kusvika kukuvaka. Kugadzirwa kwayo kunosanganisira etherification ye cellulose ne ethylene oxide pasi pemamiriro e alkaline. Matanho ekudzora mhando akakosha kuti ive nechokwadi chekuti chigadzirwa chekupedzisira chakabatana uye chakachena. Kufunga nezvekuchengetedzwa kwezvakatipoteredza kunofanirwawo kugadziriswa mukati mekugadzirwa. Nekutevera maitiro nemaprotocol akakodzera, HEC inogona kugadzirwa zvinobudirira uku ichideredza kukanganisa kwezvakatipoteredza uye ichivimbisa kuchengetedzeka kwevashandi.
Gwaro iri rinotsanangura zvakadzama maitiro ekugadzira hydroxyethyl cellulose (HEC), kubva pazvinhu zvakagadzirwa kusvika pakudzora mhando uye mashandisirwo azvo, zvichipa kunzwisisa kwakakwana maitiro ekugadzira polymer iyi inokosha.
Nguva yekutumira: Kubvumbi-10-2024