Admixtures anotamba yakakosha basa mukuvandudza kuita kwekuvaka kuomeswa, asi kuwedzera kwemutengo wakaomeswa kunoita kuti madhiri akaomeswa ekunyora zvakanyanya kupfuura izvo zvechinyakare motsi, iyo inokonzeresa kupfuura 40% ye iyo mari yemutengo mune yakaoma-yakasanganiswa dhaka.
Kubva pane zvikonzero zviri pamusoro, iyi pepa inoongorora uye inofananidza zvimwe zvinhu zvinowanzo shandiswa zvinoshandiswa zvinonakidza, uye pane izvi, zvinoitwa nekuita kwemigadzirwa yakaoma-yakasanganiswa uchishandisa adment.
1. Mvura Kuchengeta Mumiriri
Mvura Kuchengeta Mumiriri ndeyekushambadzira kusanzwisisika kwemvura yekuchengetedza kwemvura kwekuita kwemvura yakaoma-yakavhenganiswa, uye zvakare imwe yekiyi yekubvumirana kuti uone mutengo wechero rakaoma-rakavhenganiswa.
1.1 Cellulose ether
Cellulose ether is a general izwi renhevedzero zvigadzirwa zvakagadzirwa nekuita kweAlkali cellulose uye kuenzura mumiririri pasi pemamwe mamiriro ezvinhu. Alkali cellulose inotsiviwa nekusiyana kwekunyengedza vamiririri kuti vawane akasiyana cellulose eter. Maererano neIonization Progriynices of Sdzs, Cellulose eterities inogovaniswa muzvikamu zviviri: Ionic (senge carboxyMethyl cellemelle) uye isiri-ionic (yakadai se methyl cellose). Maererano nerudzi rwetsiva, cellulose ether inogona kukamurwa muMonether (senge methyl cellulose) uye yakasanganiswa ethyropropropyl methyl cellelose). Zvinoenderana nekusiyana kwakasiyana-siyana, zvinoita kunge hydroxylyl cellyl-solulose (yakadai seyakaoma-solulose cell yakakamurwa kuita rondedzero inonyarara uye pamusoro yakabatwa yakanonoka kudzvinyirira.
Iyo Mechanism yeCell yeCellulose ether muMoter ndeye inotevera:
. Zvikamu zveLubricating Firimu Rakagadzirwa pamusoro peiyo yekunze pamusoro, iyo inoita kuti system yakagadzikana, uye zvakare inovandudza iyo fluidity yemutya panguva yekusanganisa uye kusarudzika kwekuvaka.
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1.1.1 Molecular formula ye methyl cellelose (mc) [c6h7o2 (o) 3-h (och3) n] x
Mushure mekunge machira akanyatsorwadziswa ane alkali, cellulose ether anogadzirwa kuburikidza neyekutevedzana kwemaitiro ne methane chloride seyedenda. Kazhinji, iyo degree rekutsiva ndeye 1.6 ~ 2.0, uye iyo solubility yakasiyana nemadhigirii akasiyana ekutsiva. Izvo ndezvevasina-ionic cellulose ether.
. Mhinduro yaro yemvura yakagadzikana kwazvo mune huwandu hwePH = 3 ~ 12. Iyo ine kuwirirana kwakanaka ne starch, guar gum, nezvimwewo uye vazhinji surfachan. Kana tembiricha ichisvika kumhepo tembiricha, gelation inoitika.
. Kazhinji, kana huwandu hwehuwandu hwakakura, hushoma hushoma, uye visikoka yakakura, iyo mwero wekuchengetwa kwemvura wakakwira. Pakati pavo, huwandu hwekuwedzera hunonyanya kuitwa pane iyo yekuchengetwa kwemvura, uye mwero weViscosity haina kuenzana zvakananga kusvika padanho rekuchengetera mvura. Iyo yekunyungudika chiyero inonyanya kuenderana neiyo degree rekushandurwa kwepasi kweCellulose zvimedu uye tangi. Pakati peiyo metherulose methelose erinculose uye methyl cellulose uye hydroxyprusll
. Kazhinji, kukwirira kwakanyanya, kwakaipisisa kuchengetwa kwemvura. Kana tembiricha inovhuvhuta 40 ° C, kuchengetwa kwemvura methyl cellulose kuchave kuderedzwa zvakanyanya, kukanganisa zvakanyanya kuvakwa kwemutya.
. "Kunamatira" pano kunoreva kushushikana kwakanzwika pakati peiyo mushandi weMushandi weMushandi uye substrate, kureva kuti, iyo Shear Ristance yerudzi. Kunamatira kwakakwira, kurwisa Shefu kwakakura kwakakura, uye simba rinodiwa nevashandi vari mukati mekushandiswa kwakakura zvakare, uye kuita kwekuvaka kune murombo. Methyl Cellulose Adernan iri pane imwe nhanho pakati mu cellulose ether zvigadzirwa.
1.1.2 iyo molecular formula ye hydroxyprupyl methylcellose (HPMC) ndeye [C6H7O2 (OH) 3-mn (Och2ch (och2ch (och2ch (och2ch (och2ch (och2ch (och2ch (och3)
HydroxyPropyl methylcellose ndeye cellulose akasiyana-siyana ndeayo yekubuda uye kushandiswa kwave kuri kuwedzera nekukurumidza mumakore achangopfuura. Icho chisiri-ionic cellulose yakasanganiswa ether yakagadzirwa kubva kukotoni yakanatswa mushure mekunge alkalization, kushandisa profyl Iyo degree rekutsiva kazhinji 1.2 ~ 2.0. Zvivakwa zvaro zvakasiyana nekuda kweiyo dzakasiyana ratios ye metroxls zvemukati uye hydroxypruppropyl zvemukati.
(1. Asi tembiricha yayo yegungwa mumvura inopisa yakakwirira zvakanyanya kupfuura iyo ye methyl cellulose. Iyo solubility mumvura inotonhora inovandudzwa zvakare yakaenzaniswa ne methyl cellulose.
. Tembiricha inokanganisawo zvavakaita, sekuwedzera kwekuwedzera, viscosity inoderera. Nekudaro, viscosity yakakwira ine yakaderera tembiricha mari pane methyl cellelose. Kugadziriswa kwayo kwakasimba kana kuchengetwa pamhepo tembiricha.
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. Caustic soda uye lime mvura ine zvishoma kushanda pane zvayo kuita, asi Alkali inogona kukurumidza kukurumidza kupaza uye kuwedzera zvavakaita. Hydroxyprupyl methylcellose yakachengetwa kune zvakajairika kumaronda, asi kana kusungwa kwemhinduro kwakakwirira, iyo visikopa yehydroxyproslose mhinduro inowanzowedzera kuwedzera.
. Senge polyvinyl doro, starch ether, miriwo gamu, nezvimwe.
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1.1.3 hydroxythylcellulose (Hec)
Izvo zvinogadzirwa kubva pakunyatsonatswa Iyo degree rekutsiva kazhinji 1.5 ~ 2.0. Iyo ine hydrophilikuti yakasimba uye iri nyore kutora unyoro.
(1. Kugadziriswa kwayo kwakasimba pakupisa kwakanyanya pasina gomba. Inogona kushandiswa kwenguva yakareba iri pasi pekupisa kwakanyanya mudhaka, asi kuchengetwa kwemvura kwayo kwakaderera pane iyo ye methyl cellulose.
. Alkali inogona kusimudzira kupaza kwayo uye zvishoma kuwedzera zvavakaita viscosity. Kupararira kwayo mumvura kuri kuipa zvishoma pane iyo ye methyl cellulose uye hydroxypruppropyl methyl cellulose. .
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1.1.4 CarboxyMethylcellose (CMC) [C6H7O2 (o) 2och2coona] N
Ionic cellulose ether inogadzirwa kubva kune yakasikwa fibles (machira, etc.) mushure mekurapwa kweAlkali, vachishandisa sodium monochloroacetate seEdhitation mumiriri, uye vachitevera kutevedzana kwekuita. Dhigirii rekutsiva kazhinji kazhinji 0.4 ~ 1.4, uye kuita kwayo kwakanganiswa zvakanyanya neiyo degree rekutsiva.
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(2. Kana tembiricha ichidarika 50 ° C, iyo viscosity haina kuchinjika.
(3) Kugadzikana kwayo kunokanganiswa zvikuru naPh. Kazhinji, inogona kushandiswa mune gypsum-based moturu, asi kwete mumutero-based moter. Kana alkaline yakawanda, inokanganwa viscosity.
(4) Kuchengetwa kwemvura kwaro kuri kuderera kupfuura kweiyo methyl cellulose. Iyo ine mari yekudzosera pane gypsum-based dours uye inoderedza simba rayo. Nekudaro, mutengo weCarboxyMethyl Cellerose akanyanya kuderera pane iyo ye methyl cellulose.
Kutumira Nguva: Mar-23-2023