Hydroxyethyl cellulose (HEC) ipolymer isinganyungudike mumvura inobva mu cellulose. Inoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana, kusanganisira zvinonamatira, uko zvinoshanda sechinhu chinosimbisa kukora, chinogadzirisa rheology, uye chinosimbisa. Kugona kweHEC kuwedzera kunaka kwezvinonamatira kwakakosha pakushandiswa kwakawanda, zvichiita kuti chigadzirwa chinonamatira chishande zvakanaka, chishande zvakanaka, uye chigare kwenguva refu.
Hunhu hweHydroxyethyl Cellulose
HEC inogadzirwa nekuita cellulose ne ethylene oxide pasi pemamiriro e alkaline, zvichikonzera polymer ine mapoka e hydroxyethyl akabatana ne cellulose backbone. Dhigirii rekutsiva (DS) uye molar substitution (MS) ndiwo ma parameter akakosha anokanganisa hunhu hwe HEC. DS inoreva huwandu hweavhareji yemapoka e hydroxyl pa cellulose molecule akatsiviwa nemapoka e hydroxyethyl, nepo MS ichiratidza avhareji yehuwandu hwema mole e ethylene oxide akapindirana ne mole imwe ye anhydroglucose units mu cellulose.
HEC inozivikanwa nekunyungudika kwayo mumvura, ichigadzira mhinduro dzakajeka uye dzakajeka dzine viscosity yakakura. Viscosity yayo inokonzerwa nezvinhu zvakasiyana-siyana, zvinosanganisira huremu hwemamorekuru, huwandu, tembiricha, uye pH yemushonga. Huremu hwemamorekuru hweHEC hunogona kubva pahushoma kusvika pakakwirira, zvichibvumira kugadzirwa kwezvinonamira zvine zvinodiwa zvakasiyana zve viscosity.
Nzira dzekuvandudza Viscosity
Kunyungudika kwemvura mumuviri uye kuzvimba:
HEC inowedzera kunaka kwechinhu chinonamira kuburikidza nekukwanisa kwayo kunyorovesa uye kuzvimba mumvura. Kana HEC ikaiswa muchimiro chinonamira mumvura, mapoka ehydroxyethyl anokwezva mamorekuru emvura, zvichikonzera kuzvimba kwemaketani epolymer. Kuzvimba uku kunowedzera kuramba kwemushonga kuyerera, nokudaro zvichiwedzera kunaka kwawo. Kukura kwekuzvimba uye kunaka kwawo kunokonzerwa nekuwanda kwepolymer uye huremu hweHEC.
Kubatwa kweMorekuru:
Mukugadzirisa, mapolymer eHEC anobatwa nekuda kwechimiro chawo chechain refu. Kubatwa uku kunogadzira network inotadzisa kufamba kwemamorekuru mukati mechinamira, nokudaro zvichiwedzera viscosity. HEC ine huremu hwakawanda hwemamorekuru inoguma nekubatwa kwakakosha uye viscosity yakakwira. Mwero wekubatwa unogona kudzorwa nekugadzirisa huwandu hwepolymer uye huremu hwemamorekuru hweHEC inoshandiswa.
Kubatana kweHydrogen:
HEC inogona kugadzira hydrogen bonds nemamorekuru emvura nezvimwe zvikamu muchimiro chekunamatira. Ma hydrogen bonds aya anobatsira mukunaka kwemuviri nekugadzira network yakarongeka mukati memhinduro. Mapoka ehydroxyethyl ari pamutsara we cellulose anowedzera kugona kugadzira hydrogen bonds, zvichiwedzera kukora kwemuviri.
Maitiro Ekuita Kuti Zvive Zvitete:
HEC inoratidza maitiro ekuchekerera ganda, zvichireva kuti viscosity yayo inoderera kana yachekerera ganda. Hunhu uhwu hunobatsira mukushandiswa kwekunamira nekuti kunoita kuti zvive nyore kushandisa pasi pekuchekerera ganda (sekuparadzira kana kukwesha) uku uchichengetedza viscosity yakanyanya paunenge wakazorora, zvichiita kuti kunamira kushande zvakanaka uye kugadzikana. Maitiro ekuchekerera ganda eHEC anokonzerwa nekuenderana kwemacheni epolymer munzira inoshandiswa, zvichideredza kuramba kwemukati kwenguva pfupi.
Mashandisirwo muAdhesive Formulations
Zvinonamira Zvinobva Mumvura:
HEC inoshandiswa zvakanyanya mumaglues anobva mumvura, akadai seaya epepa, machira, nematanda. Kugona kwayo kukora nekudzikamisa fomura yeglue kunoita kuti irambe yakasanganiswa zvakaenzana uye iri nyore kushandisa. Mumaglues epepa nepakurongedza, HEC inopa viscosity inodiwa kuti ishandiswe zvakanaka uye isimbise kubatana.
Zvinonamira zvekuvaka:
Mumaglue ekuvaka, akadai seaya anoshandiswa pakuisa mataira kana kufukidza madziro, HEC inowedzera kunaka kweglue, ichivandudza kushanda kweglue uye kuramba kwayo kudonha. Kusimba kweHEC kunoita kuti gunde rirambe riri panzvimbo yaro panguva yekushandiswa uye kugara zvakanaka, zvichipa chisungo chakasimba uye chinogara kwenguva refu.
Zvinonamira zveRunako uye zveKuchengetedza Munhu:
HEC inoshandiswawo muzvigadzirwa zvekunamira uye zvekuchengetedza muviri zvinoda zvinhu zvinonamira, zvakaita semagel ekugadzira bvudzi uye masks ekumeso. Mukushandiswa uku, HEC inopa kugadzikana kwakafanana uye kwakanaka, zvichivandudza mashandiro echigadzirwa uye ruzivo rwemushandisi.
Zvinonamira zveMishonga:
Muindasitiri yemishonga, HEC inoshandiswa mumapatches e transdermal nedzimwe nzira dzekutumira mishonga uko kupenya kwakadzora kwakakosha pakushanda kweglue. HEC inoita kuti glue rive rakafanana, zvichipa kuendesa mishonga nguva dzose uye kunamira paganda.
Zvinhu Zvinokanganisa Kuvandudzwa kweViscosity
Kuisa pfungwa pachinhu chimwe:
Kuwanda kweHEC muchimiro cheglue kunoenderana zvakananga nekuwanda kwechinhu. Kuwanda kweHEC kunokonzera kuwedzera kwekuwanda kwechinhu nekuda kwekubatana kwakakosha kwepolymer chain uye kupindirana. Zvisinei, kuwanda kwakanyanya kunogona kutungamira mukukura kweganda uye kuoma kwekugadzirisa.
Kurema kweMorekuru:
Huremu hwemamorekuru hweHEC chinhu chakakosha pakuona huremu hwechinamatidzwa. HEC ine huremu hwakawanda inopa huremu hwakawanda pahuwandu hwakaderera zvichienzaniswa nehuremu hwakaderera hwemamorekuru. Sarudzo yehuremu hwemamorekuru inoenderana nehuremu hwaunoda uye zvinodiwa pakushandisa.
Tembiricha:
Kupisa kunokanganisa kusviba kwemhinduro dzeHEC. Sezvo tembiricha ichiwedzera, kusviba kunowanzo derera nekuda kwekuderera kwekubatana kwehydrogen uye kuwedzera kwekufamba kwemamorekuru. Kunzwisisa hukama hwetembiricha nekusviba kwakakosha kune mashandisirwo anosangana netembiricha dzakasiyana.
pH:
pH yemusanganiswa wechinamira inogona kukanganisa kusimba kweHEC. HEC yakagadzikana pane pH yakawanda, asi mamiriro epH akanyanya anogona kutungamira kuchinjwa kwechimiro chepolymer uye kusimba. Kugadzira manamira mukati mehuwandu hwakanaka hwepH kunoita kuti pave nekushanda kwakafanana.
Mabhenefiti ekushandisa Hydroxyethyl Cellulose
Zvisikwa Zvisiri zveIonic:
Kusava ne ionic kweHEC kunoita kuti ienderane nezvimwe zvinhu zvakasiyana-siyana, kusanganisira mamwe ma polymer, ma surfactants, uye ma electrolytes. Kuenderana uku kunobvumira ma namatidziro akasiyana-siyana.
Kuora kwechinhu:
HEC inobva mu cellulose, chinhu chechisikigo uye chinogona kushandiswazve. Inogona kuora, zvichiita kuti ive sarudzo isingakuvadzi nharaunda yemhando dze namatidza. Kushandiswa kwayo kunoenderana nekuwedzera kwekudiwa kwezvigadzirwa zvinogara kwenguva refu uye zvisingakuvadzi nharaunda.
Kugadzikana:
HEC inopa kugadzikana kwakanaka kune mafomura eglue, ichidzivirira kupatsanurwa kwechikamu uye kugadzikana kwezvikamu zvakasimba. Kugadzikana uku kunoita kuti guremu rirambe richishanda kwenguva yese yaro uye panguva yekushandiswa.
Zvimiro zvekugadzira mafirimu:
HEC inogadzira mafirimu anochinjika uye akajeka kana yaoma, izvo zvinobatsira pakunamira kunoda tambo yakajeka uye inochinjika. Hunhu uhwu hunonyanya kubatsira mukushandiswa kwakadai sema label nematepi.
Hydroxyethyl cellulose inoita basa guru mukuwedzera kunaka kwezvinonamira kuburikidza nenzira dzakadai semvura nekuzvimba, kupindirana kwemamorekuru, kubatana kwehydrogen, uye maitiro ekuchekerera. Hunhu hwayo, kusanganisira kunyungudika, hunhu husina ionic, kuora kwehupenyu, uye kugona kugadzira firimu, zvinoita kuti ive sarudzo yakakodzera kune akasiyana mashandisirwo ekunamira. Kunzwisisa zvinhu zvinokanganisa kuwedzera kunaka kweHEC, zvakaita sekuwanda, huremu hwemorekuru, tembiricha, uye pH, kunobvumira vagadziri vemagadzirirwo kugadzira zvigadzirwa zvinonamira kuti zvienderane nezvinodiwa zvekushanda. Sezvo maindasitiri achiramba achitsvaga zvinhu zvinogara kwenguva refu uye zvinoshanda zvakanyanya, HEC ichiri chikamu chakakosha mukugadzirwa kwezvinhu zvinonamira zvepamusoro.
Nguva yekutumira: Chivabvu-29-2024