Hydroxyethyl cellulose (HEC) ipolymer isinganyunguduke mumvura inoshandiswa zvakanyanya muzvizoro, mishonga, pendi, machira, kuvaka nedzimwe nzvimbo. Ine kukora kwakanaka, kumisa, kupararira, emulsification, kugadzira mafirimu, kuchengetedza mvura nezvimwe zvinhu, saka yave chinhu chakakosha mubatsiri mumaindasitiri mazhinji. Zvisinei, hydroxyethyl cellulose haiwanikwe zvakananga kubva muzvinhu zvakasikwa, asi inowanikwa nekushandisa makemikari kugadzirisa cellulose yechisikigo. Kuti tinzwisise kwakabva hydroxyethyl cellulose, tinofanira kutanga tanzwisisa kwakabva uye chimiro che cellulose.
Sosi yechisikigo ye cellulose
Cellulose ndeimwe yemapolymer eorganic akawanda pasi pano uye inowanikwa zvakanyanya mumadziro esero emiti, kunyanya mumiti ine miti, donje, flax nedzimwe fiber dzemiti. Chinhu chakakosha muchimiro chemiti uye chinopa simba remakanika uye kugadzikana. Chikamu chikuru che cellulose imorekuru yeglucose, iyo yakabatana ne β-1,4-glycosidic bonds kuti igadzire chimiro checheni refu. Sezvinhu zvepolymer zvechisikigo, cellulose ine hunhu hwakanaka hwemuviri nemakemikari, zvichiita kuti ive chinhu chakakosha chezvinobva mumiti yakasiyana-siyana.
Kugadzirira kwehydroxyethyl cellulose
Kunyangwe cellulose pachayo iine hunhu hwakawanda hwakanaka, huwandu hwayo hwekushandiswa hwakaganhurirwa kusvika pamwero wakati. Chikonzero chikuru ndechekuti cellulose haina kunyungudika kwakawanda, kunyanya kunyungudika kushoma mumvura. Kuti vavandudze hunhu uhwu, masayendisiti anogadzirisa cellulose nemakemikoro kuti vagadzire zvakasiyana-siyana zvinobva mu cellulose. Hydroxyethyl cellulose i cellulose ether inonyungudika mumvura inowanikwa ne ethoxylating natural cellulose kuburikidza ne chemical reaction.
Mukugadzirira kwacho, cellulose yechisikigo inotanga yanyungudutswa mualkali solution, uye ethylene oxide inowedzerwa mu reaction system. Ethoxylation reaction ye ethylene oxide ne hydroxyl groups mu cellulose inoitika kuti igadzire hydroxyethyl cellulose. Kuchinja uku kunowedzera hydrophilicity ye cellulose chains, nokudaro zvichivandudza kunyunguduka kwayo uye viscosity properties mumvura.
Main mbishi zvinhu zvinobva
Chinhu chikuru chekugadzira hydroxyethyl cellulose icellulose, uye manyuko echisikigo e cellulose anosanganisira:
Matanda: Kuwanda kwe cellulose mumatanda kwakakwira, kunyanya mumatanda e coniferous neane mashizha akafara, uko cellulose inogona kusvika 40%-50%. Matanda ndeimwe yenzvimbo dzinonyanya kukosha dze cellulose mumaindasitiri, kunyanya mukugadzira mapepa uye kugadzirwa kwe cellulose derivatives.
Donje: Donje rakagadzirwa ne cellulose yakachena, uye huwandu hwe cellulose mudonje hunosvika 90%. Nekuda kwekuchena kwayo kwakanyanya, donje rakagadzirwa rinowanzo shandiswa kugadzira zvinhu zvemhando yepamusoro zve cellulose.
Mashinda emiti akadai seflakisi nehemp: Mashinda emiti aya akapfumawo mu cellulose, uye nekuti mashinda aya emiti anowanzova nesimba guru remuchina, anewo zvakanakira pakuburitsa cellulose.
Marara ekurima: anosanganisira uswa, uswa hwegorosi, uswa hwechibage, nezvimwewo. Zvinhu izvi zvine huwandu hwakati hwe cellulose, uye cellulose inogona kutorwa kubva mazviri kuburikidza nemaitiro akakodzera ekurapa, zvichipa sosi yakachipa uye inogona kushandiswazve yezvinhu zvitsva zvekugadzira cellulose derivatives.
Nzvimbo dzekushandisa dze hydroxyethyl cellulose
Nekuda kwehunhu hwakakosha hwehydroxyethyl cellulose, inoshandiswa zvakanyanya muminda yakawanda. Inotevera ndiyo nzvimbo dzinoverengeka dzekushandisa:
Indasitiri yekuvaka: Hydroxyethyl cellulose inoshandiswa zvakanyanya muzvinhu zvekuvaka sechinhu chinosimbisa uye chinochengetedza mvura, kunyanya mumota yesimende, gypsum, putty powder nezvimwe zvinhu, izvo zvinogona kuvandudza zvinobudirira hunhu hwekuvaka uye hwekuchengetedza mvura yezvinhu.
Indasitiri yemakemikari yezuva nezuva: Mumasiponji, zvigadzirwa zvekuchengetedza ganda, shampoos nezvimwe zvigadzirwa zvemakemikari zvezuva nezuva, hydroxyethyl cellulose inoshandiswa sechinosimbisa uye chinosimbisa kuti chigadzirwa chinzwe uye chigadzikane.
Pendi nependi: Muindasitiri yependi, hydroxyethyl cellulose inoshandiswa semushonga wekukora uye kudzora rheology kuti ivandudze kushanda kwependi uye kudzivirira kudonha.
Munda weMishonga: Mukugadzira mishonga, hydroxyethyl cellulose inogona kushandiswa semushonga unosunga, unosimbisa uye unomisa mapiritsi kuti ivandudze hunhu hwekuburitsa mishonga uye kugadzikana kwayo.
Kunyange hazvo hydroxyethyl cellulose isiri chinhu chinongoitika chega, zvinhu zvayo zvepakutanga, cellulose, zviripo zvakanyanya mumiti mune zvakasikwa. Kuburikidza nekuchinja kwemakemikari, cellulose yechisikigo inogona kushandurwa kuita hydroxyethyl cellulose nekushanda kwakanaka uye kushandiswa mumaindasitiri akasiyana-siyana. Zvirimwa zvechisikigo zvakaita sehuni, donje, flax, nezvimwewo zvinopa sosi yakawanda yezvinhu zvekugadzira hydroxyethyl cellulose. Nekufambira mberi kwesainzi netekinoroji uye kuwedzera kwekudiwa kwemaindasitiri, maitiro ekugadzira hydroxyethyl cellulose ari kuramba achigadziriswa, uye anotarisirwa kuratidza kukosha kwayo kwakasiyana mune mamwe minda mune ramangwana.
Nguva yekutumira: Gumiguru-23-2024