Hydroxyethyl cellulose (HEC) chinhu chichena kana cheyero yakapfava, chisina hwema, chisina chepfu, chine fibrous kana kuti chine upfu. Yakagadzirwa nedonje rakagadzirwa kana kuti pulp yakacheneswa yakanyikwa mu30% yemvura inonyunguduka. Mushure mehafu yeawa, inobviswa yodzvanywa. Dzvinyirira kusvika chiyero chemvura yealkaline chasvika 1:2.8, wobva wapwanya. Inogadzirwa ne etherification reaction uye ndeye non-ionic soluble cellulose ethers. Hydroxyethyl cellulose chinhu chakakosha mu latex paint. Ngatitarisei mashandisirwo e hydroxyethyl cellulose HEC mu latex paint uye matanho ekudzivirira.
1. Yakashongedzerwa nedoro remushonga wekushandisa: tanga washandisa hydroxyethyl cellulose HEC kugadzira doro remushonga we ...
2. Wedzera zvakananga panguva yekugadzira: nzira iyi ndiyo iri nyore uye inotora nguva pfupi. Wedzera mvura yakachena mubhaketi hombe ine muchina wekusanganisa wakakura. Tanga kusanganisa nguva dzose nekumhanya kwakaderera uye zvishoma nezvishoma sefa hydroxyethyl cellulose mumushonga zvakaenzana. Ramba uchisanganisa kusvika zvidimbu zvese zvanyorova. Wobva wawedzera zvinochengetedza nezvimwe zvinowedzera. Zvakadai sepigments, dispersing aids, ammonia water, nezvimwewo. Kurudzira kusvika hydroxyethyl cellulose HEC yese yanyungudika zvachose (viscosity yemushonga inowedzera pachena) wobva wawedzera zvimwe zvikamu mufomura yekuita.
Sezvo hydroxyethyl cellulose HEC yakacheneswa pamusoro iri powdery kana fibrous solid, paunenge uchigadzira hydroxyethyl cellulose mother liquor, teerera pane zvinotevera:
(1) Paunenge uchishandisa high-viscosity hydroxyethyl cellulose HEC, huwandu hwedoro raamai harifanirwe kupfuura 2.5-3% (nehuremu), zvikasadaro doro raamai richave rakaoma kubata.
(2) Usati waisa hydroxyethyl cellulose HEC uye mushure mekuwedzera, inofanira kumutswa nguva dzose kusvika mhinduro yacho yanyatsojeka uye yakajeka.
(3) Nepo zvichibvira, wedzera mushonga wekuuraya fungus pachine nguva.
(4) Kupisa kwemvura uye pH yemvura zvine hukama hwakajeka nekunyungudika kwehydroxyethyl cellulose, saka kutarisisa kwakakosha kunofanira kupihwa.
(5) Usawedzera zvimwe zvinhu zvine alkaline mumusanganiswa usati wanyikwa upfu hwe hydroxyethyl cellulose nemvura. Kuwedzera pH mushure mekunyikwa kunobatsira kunyungudika.
(6) Inofanira kupetwa zvishoma nezvishoma mutangi rekusanganisa, uye usawedzera huwandu hwakawanda kana kuwedzera zvakananga hydroxyethyl cellulose yakaumba mapundu nemabhora mutangi rekusanganisa.
Zvinhu zvakakosha zvinokanganisa viscosity yependi yelatex:
(1) Kuora kwechinhu chinogocha netupukanana.
(2) Mukugadzira pendi, kana matanho ekuwedzera thickener akakodzera.
(3) Kana huwandu hwechinhu chinoshandiswa pakugadzira pendi nemvura zvakafanira.
(4) Chiyero chehuwandu hwezvimwe zvinhu zvinosimbisa ganda zvechisikigo nehuwandu hwehydroxyethyl cellulose mukugadzirwa kwependi.
(5) Kana latex yaumbwa, huwandu hwezvinhu zvinoderedza kusimba kwemasero nezvimwe zvinhu zvinokonzeresa kusimba kwemasero.
(6) Tembiricha yakanyanya kukwira panguva yekupararira nekuda kwekukurunga zvakanyanya.
(7) Mafuro emhepo akawanda anoramba ari mupendi, ndiko kuwedzera kwe viscosity.
Kusimba kwehydroxyethyl cellulose HEC kunochinja zvishoma mu pH range ye2-12, asi kusimba kunoderera kupfuura iyi range. Ine hunhu hwekukora, kumisa, kusunga, kusanganisa, kuparadzira, kuchengetedza hunyoro uye kuchengetedza colloid. Mhinduro dziri mumhando dzakasiyana dze viscosity dzinogona kugadzirwa. Dzisina kugadzikana pasi pekupisa kwakajairika nekumanikidzwa, dzivisa hunyoro, kupisa, uye tembiricha yepamusoro, uye ine munyu wakanaka kwazvo unonyungudika ku dielectrics, uye mvura yayo inobvumirwa kuva nehuwandu hwakawanda hwemunyu uye inoramba yakagadzikana.
Nguva yekutumira: Kubvumbi-01-2023