Hydroxyethyl Cellulose (HEC) yakajairika isiri-ionic mvura-soluble polymer kombiyuta ine yakanakisa kukora, kuchengetwa kwemvura, uye firimu-kugadzira zvinhu. Nokudaro, inoshandiswa zvakanyanya mukuputira, latex pendi, uye glues. Adhesives uye mamwe maindasitiri. Latex pendi chikamu chakakosha chezvinhu zvemazuva ano zvekushongedza zvivakwa, uye kuwedzerwa kweHEC hakugone kungovandudza kugadzikana kwependi yelatex, asiwo kunatsiridza kushanda kwayo kwekuvaka.
1. Hunhu hunokosha hwehydroxyethyl cellulose
Hydroxyethyl cellulose imvura-inonyungudika polima inowanikwa nekugadziriswa kwemakemikari uchishandisa yakasikwa cellulose seyakagadzirwa. Zvikuru zvayo zvinosanganisira:
Kukora: HEC ine yakanaka thickening mhedzisiro, iyo inogona kuwedzera zvakanyanya viscosity yependi yelatex uye kupa latex pendi yakanakisa thixotropy uye rheology, nekudaro ichigadzira yunifomu uye dense coating panguva yekuvaka.
Kuchengetwa kwemvura: HEC inogona kunyatso kudzivirira mvura kuti irege kubuda nekukurumidza mupende, nekudaro ichiwedzera nguva yekuvhura yepende yelatex uye kuvandudza kuomeswa uye firimu-kuumba zvimiro zvependi firimu.
Kugadzikana: HEC ine yakanakisa kugadzikana kwemakemikari mulatex pendi maumbirwo, inogona kuramba mhedzisiro yepH shanduko, uye haina maitiro akashata kune zvimwe zvinongedzo mupende (senge pigments uye fillers).
Kuenzana: Nekugadzirisa huwandu hweHEC, kuyerera uye kuenzana kwependi yelatex inogona kuvandudzwa, uye matambudziko akadai sagging uye mabrashi mamaki mufirimu repende anogona kudzivirirwa.
Kushivirira kwemunyu: HEC ine kumwe kushivirira kune electrolytes, saka inogona kuramba ichiita zvakanaka mukuumbwa ine munyu kana mamwe ma electrolyte.
2. Maitiro ekuita kwehydroxyethyl cellulose mu latex pendi
Seyakakora uye inodzikamisa, iyo huru nzira yekuita yehydroxyethyl cellulose mupende yelatex inogona kuongororwa kubva kune zvinotevera zvinhu:
(1) Kukora mhedzisiro
HEC inonyungudika nekukurumidza mumvura uye inoumba mhinduro yakajeka, ine viscous. Nekugadzira hydrogen zvisungo nemamorekuru emvura, HEC mamorekuru anovhura uye anowedzera viscosity yemhinduro. Nekugadzirisa huwandu hweHEC, iyo viscosity yependi yelatex inogona kunyatsodzorwa kuti iite yakanakira kuvaka kuita. Iyo thickening mhedzisiro yeHEC zvakare ine hukama nehuremu hwayo hwemamorekuru. Kazhinji, kukwira kwehuremu hwema molecular, ndiko kunowedzera kukosha kwekukora.
(2) Kudzikamisa mhedzisiro
Kune huwandu hukuru hwema emulsion, pigment uye mafiller mu latex pendi, uye kudyidzana pakati pezvikamu izvi kunogona kuitika, zvichikonzera delamination kana kunaya kwependi yelatex. Sechidziviriro colloid, HEC inogona kuumba yakagadzikana sol system muchikamu chemvura kudzivirira pigments uye mafirita kubva pakugadzirisa. Mukuwedzera, HEC ine kumira kwakanaka kwekuchinja kwekushisa uye simba rekuveura, saka inogona kuvimbisa kugadzikana kwepende ye latex panguva yekuchengetedza nekuvaka.
(3) Kuvandudza kuvakwa
Kuita kwekushandiswa kwepende ye latex kunoenderana zvakanyanya neiyo rheological properties. Nekukora nekuvandudza rheology, HEC inogona kuvandudza mashandiro e-anti-sag yepende ye latex, ichibvumira kuti ipararire zvakaenzana panzvimbo dzakamira uye ichiita kuti isanyanya kuyerera. Panguva imwecheteyo, HEC inogonawo kuwedzera nguva yekuvhura yepende ye latex, ichipa vashandi vekuvaka nguva yakawanda yekugadzira zvigadziriso uye kuderedza mabhurashi mamaki uye kuyerera mamaki.
3. Nzira yekuwedzera sei hydroxyethyl cellulose kune latex pendi
Kuti uite zvizere mhedzisiro yehydroxyethyl cellulose, iyo nzira yekuwedzera yakakosha yakakosha. Kazhinji kutaura, kushandiswa kweHEC mupende yelatex kunosanganisira matanho anotevera:
(1) Pre-dissolution
Sezvo HEC inonyungudika zvishoma nezvishoma mumvura uye inowanzoita clumping, inowanzokurudzirwa kuti isati yanyungudusa HEC mumvura kuti iite yunifomu colloidal solution isati yashandiswa. Kana ichinyunguduka, HEC inofanira kuwedzerwa zvishoma nezvishoma uye ichisimudzwa nguva dzose kudzivirira kusangana. Kudzora tembiricha yemvura panguva yekuparara kwakakosha zvakare. Zvinowanzokurudzirwa kuita kunyungudika pakupisa kwe20-30 ° C kudzivirira kupisa kwemvura kwakanyanya kunokanganisa chimiro chemolecular yeHEC.
(2) Wedzera kurongeka
Mukugadzirwa kwependi ye latex, HEC inowanzowedzerwa panguva yekuputika. Paunenge uchigadzira latex pendi, iyo pigment uye mafirita anotanga kuparadzirwa muchikamu chemvura kuita slurry, uye ipapo HEC colloidal solution inowedzerwa panguva yekuparadzira nhanho kuti ive nechokwadi chekuti inogona kugoverwa zvakaenzana muhurongwa. Iyo nguva yekuwedzera HEC uye kusimba kwekukurudzira kuchakanganisa kukora kwayo, saka inoda kugadziridzwa zvinoenderana nechaiyo muitiro zvinodiwa mukugadzirwa chaiko.
(3) Kudzora chipimo chemushonga
Huwandu hweHEC hune mhedzisiro yakananga pakuita kwepende ye latex. Kazhinji, huwandu hwekuwedzera hweHEC ndeye 0.1% -0.5% yehuwandu hwepende ye latex. Kunyanya kushoma HEC kuchaita kuti kukora kuite kusakosha uye pende yelatex ive yakawandisa, nepo HEC yakawandisa ichaita kuti viscosity ive yakanyanya, inokanganisa kushanda. Naizvozvo, mukushandisa zvinoshanda, kuyerwa kweHEC kunoda kugadziridzwa zvine mutsindo zvichienderana neiyo chaiyo formula uye zvinodiwa zvekuvaka zvependi yelatex.
4. Mienzaniso yekushandisa yehydroxyethyl cellulose mu latex pendi
Mukugadzira chaiko, HEC yakashandiswa zvakanyanya mumhando dzakasiyana dze latex pendi, senge:
Interior wall latex pendi: Iko kukora uye kuchengetedza mvura zvivakwa zveHEC zvinoita kuti inyatso kuvandudza kuenzana uye anti-sag zvimiro zvependi firimu mukati memadziro emadziro latex pendi, kunyanya munzvimbo dzekupisa kwepamusoro kwainogona kuramba ichishanda zvakanaka.
Kunze kwemadziro latex pendi: Kugadzikana uye munyu kuramba kweHEC kunoita kuti ivandudze mamiriro ekunze uye kuramba kuchembera mukati mekunze kwemadziro latex pendi uye kuwedzera hupenyu hwesevhisi yefirimu repende.
Anti-mildew latex pendi: HEC inogona kunyatsoparadzira iyo anti-mildew agent mu-anti-mildew latex pendi uye inovandudza kufanana kwayo mufirimu repende, nekudaro ichivandudza anti-mildew effect.
Seyakanakisa latex pendi yekuwedzera, hydroxyethyl cellulose inogona zvakanyanya kuvandudza mashandiro elatex pendi kuburikidza nekukora kwayo, kuchengetedza mvura, uye kudzikamisa mhedzisiro. Mumashandisirwo anoshanda, kubata zvine musoro kweiyo nzira yekuwedzera uye dosi yeHEC inogona kuvandudza zvakanyanya kuvakwa uye kushandisa mhedzisiro yependi yelatex.
Nguva yekutumira: Oct-22-2024