Hydroxyethyl Methyl Cellulose (HEMC)chinhu chakakosha cellulose ether komboni uye ndeche-non-ionic cellulose ether. HEMC inowanikwa nekugadziriswa kwekemikari ine yakasikwa cellulose seyakagadzirwa. Chimiro chayo chine hydroxyethyl uye methyl substituents, saka ine yakasarudzika yemuviri uye makemikari zvimiro uye inoshandiswa zvakanyanya mukuvaka, machira, makemikari ezuva nezuva, mushonga uye mamwe minda.
1. Muviri uye makemikari zvinhu
HEMC inowanzova yakachena kana isina-chena poda kana granules, iyo inonyungudika nyore nyore mumvura inotonhora kuti iite yakajeka kana zvishoma turbid colloidal solution. Hunhu hwayo hukuru hunosanganisira:
Solubility: HEMC inogona kunyungudika nekukurumidza mumvura inotonhora, asi isina kunyungudika kwakashata mumvura inopisa. Solubility yayo uye viscosity inoshanduka nekuchinja kwekushisa uye pH kukosha.
Kukora mhedzisiro: HEMC ine simba gobvu rakasimba mumvura uye inogona kunyatso kuwedzera viscosity yemhinduro.
Kuchengetwa kwemvura: Iyo ine yakanakisa kuchengetedza kwemvura kuita uye inogona kudzivirira kurasikirwa kwemvura mune izvo zvinhu.
Firimu-yekugadzira chivakwa: HEMC inogona kuumba yunifomu yakajeka firimu pamusoro nekumwe kuoma uye kusimba.
Lubricity: Nekuda kweiyo yakasarudzika molecular chimiro, HEMC inogona kupa yakanakisa lubrication.
2. Nzira yekugadzira
Maitiro ekugadzira eHEMC anonyanya kusanganisira anotevera matanho:
Alkalization: Natural cellulose inorapwa pasi pemamiriro ealkaline kuita alkali cellulose.
Etherification reaction: Nekuwedzera methylating agents (senge methyl chloride) uye hydroxyethylating agents (senge ethylene oxide), cellulose inopinda etherification reaction pane chaiyo tembiricha uye kumanikidzwa.
Mushure mekurapa: Chigadzirwa chisina kuchena chinokonzeresa, chinogezwa, chakaomeswa, uye chakapwanyika kuti chiwane.HEMCzvigadzirwa.
3. Nzvimbo huru dzekushandisa
(1) Zvishandiso zvekuvaka HEMC inoshandiswa zvakanyanya mundima yekuvaka, kunyanya mune simende dhaka, putty poda, tile inonamira, gypsum uye zvimwe zvigadzirwa. Inogona kuvandudza viscosity, kuchengetwa kwemvura uye anti-sagging zvivakwa zvezvinhu zvekuvaka, kurebesa nguva yakavhurika, uye nekudaro inovandudza kuita kwekuvaka.
(2) Pendi neingi Mupendi, HEMC inoshanda seyakakora uye emulsifier stabilizer kuvandudza viscosity uye rheology yependi uye kudzivirira iyo yekupfeka kubva mukudonha. Mukuwedzera, inogona kupa maitiro akanaka ekugadzira firimu, zvichiita kuti pendi yepamusoro iwedzere kufanana uye yakatsetseka.
(3) Mushonga uye zvizoro HEMC inogona kushandiswa seanonamatira uye firimu-inogadzira mumiriri mumapiritsi emishonga, pamwe chete neinokora uye inonyorovesa muzvigadzirwa zvekuchengetedza ganda. Nekuda kwekuchengetedza kwayo kwakanyanya uye biocompatibility, inowanzoshandiswa muzvigadzirwa zvakaita semadonhwe emeso, kuchenesa kumeso, uye lotions.
(4) Mishonga yezuva nezuva Mumakemikari ezuva nezuva akadai sedetergents uye mazino, HEMC inoshandiswa sehutsi uye stabilizer kusimbisa rheology uye kugadzikana kwechigadzirwa.
4. Zvakanakira uye kuchengetedzwa kwezvakatipoteredza
HEMC ine yakakwirira biodegradability uye kuchengetedzwa kwezvakatipoteredza uye haizokonzeri kusvibiswa kwenguva refu kune zvakatipoteredza. Panguva imwecheteyo, haina chepfu uye haina kukuvadza, isingatsamwire ganda remunhu uye mucous membranes, uye inosangana nezvinodiwa zvegirinhi kuchengetedzwa kwezvakatipoteredza uye kusimudzira kwakasimba.
5. Tarisiro yemusika uye mafambiro ebudiriro
Nekuvandudzwa kweindasitiri yekuvaka uye indasitiri yemakemikari yemazuva ese, kudiwa kwemusika kweHEMC kuri kuramba kuchikura. Mune ramangwana, sezvo vanhu vachinyanya kutarisisa kune zvakatipoteredza zvine hushamwari zvinhu uye nekuwedzera kuvandudza mashandiro echigadzirwa, HEMC ichave yakanyanya kushandiswa munzvimbo dzakasiyana siyana. Pamusoro pezvo, kutsvagisa uye kuvandudzwa kwezvitsva zvinoshanda HEMC zvigadzirwa (senge tembiricha inodzivirira uye nekukurumidza mhando) ichasimudzirawo kushandiswa kwayo mumusika wepamusoro-soro.
Seyakawanda inoshanda uye yakakwirira-inoshanda cellulose ether,hydroxyethyl methylcellulose (HEMC)inoita basa rakakosha mukuvaka, machira, mushonga uye mamwe minda ine yakasarudzika yemuviri uye makemikari zvinhu. Nekufambira mberi kwesainzi uye tekinoroji uye nekuwedzera kwenzvimbo dzekushandisa, HEMC ichaita basa rakakosha muindasitiri yemazuva ano uye nekupa rutsigiro rwakasimba mukusimudzira maindasitiri ane hukama.
Nguva yekutumira: Nov-11-2024