Carboxymethyl selulose ：
Ionicselile etherikozwe muri fibre naturel (ipamba, nibindi) nyuma yo kuvura alkali, ukoresheje sodium monochloroacetate nka agent ya etherification, kandi ikavurwa muburyo bwo kuvura. Urwego rwo gusimburwa muri rusange ni 0.4 ~ 1.4, kandi imikorere yarwo igira ingaruka cyane kurwego rwo gusimburwa.
(1) Carboxymethyl selulose ni hygroscopique, kandi izaba irimo amazi menshi mugihe abitswe mubihe rusange.
. Iyo ubushyuhe burenze 50 ° C, ubukonje ntibusubira inyuma.
(3) Guhagarara kwayo bigira ingaruka cyane kuri PH. Mubisanzwe, irashobora gukoreshwa muri minisiteri ishingiye kuri gypsumu, ariko ntabwo ikoreshwa muri minisiteri ishingiye kuri sima. Iyo alkaline nyinshi, izatakaza ubukonje.
(4) Kubika amazi kwayo ni munsi cyane ugereranije na methyl selile. Ifite ingaruka mbi kuri gypsumu ishingiye kuri minisiteri kandi igabanya imbaraga zayo. Nyamara, igiciro cya carboxymethyl selulose kiri hasi cyane ugereranije na methyl selile.
Cellulose alkyl ether ：
Abahagarariye ni methyl selulose na Ethyl selulose. Mu musaruro w’inganda, methyl chloride cyangwa Ethyl chloride ikoreshwa muri rusange nka etherification agent, kandi reaction niyi ikurikira:
Muri formula, R igereranya CH3 cyangwa C2H5. Kwibanda kwa alkali ntabwo bigira ingaruka gusa kurwego rwa etherification, ahubwo binagira ingaruka kumikoreshereze ya alkyl halide. Hasi ya alkali yibanze, hydrolysis ikomeye ya alkyl halide. Kugirango ugabanye ikoreshwa rya etherifying agent, alkali yibanze igomba kwiyongera. Nyamara, iyo alkali yibanze cyane, ingaruka zo kubyimba za selile ziragabanuka, ibyo bikaba bitajyanye na etherification reaction, kandi urwego rwa etherifike rero rugabanuka. Kubwiyi ntego, lye yibanze cyangwa lye ikomeye irashobora kongerwaho mugihe cyo kwitwara. Imashini igomba kuba ifite ibikoresho byiza byo gukurura no gutanyagura kugirango alkali isaranganywa neza.
Methyl selulose ikoreshwa cyane nkibyimbye, bifata kandi birinda colloid nibindi. Irashobora kandi gukoreshwa nko gukwirakwiza polymerisiyasi ya emulsiyo, gukwirakwiza imbuto, guhunika imyenda, kongeramo ibiryo no kwisiga, imiti ivura imiti, ibikoresho byo gutwikira ibiyobyabwenge, hamwe no gusiga irangi rya latx, gucapa wino, ceramic nibindi, no kuvanga mugihe cyo gushyiramo sima.
Ibicuruzwa bya Ethyl selile bifite imbaraga zo gukanika, guhinduka, kurwanya ubushyuhe no kurwanya ubukonje. Ethyl selulose isimbuwe cyane irashobora gushonga mumazi no kugabanya ibisubizo bya alkaline, kandi ibicuruzwa byasimbuwe cyane birashobora gushonga mumashanyarazi menshi. Ifite imiyoboro myiza hamwe na resin zitandukanye. Irashobora gukoreshwa mugukora plastike, firime, langi, ibifatika, latex nibikoresho byo gutwikira ibiyobyabwenge, nibindi.
Kwinjiza amatsinda ya hydroxyalkyl muri selulose alkyl ethers irashobora kunoza ubukana bwayo, kugabanya ubukana bwayo bwo gushiramo umunyu, kongera ubushyuhe bwimyororokere no kunoza imitunganyirize ishushe, nibindi.
Cellulose hydroxyalkyl ether ：
Abahagarariye ni hydroxyethyl selulose na hydroxypropyl selulose. Ibikoresho bya etherifying ni epoxide nka okiside ya Ethylene na okiside ya propylene. Koresha aside cyangwa base nkibikoresho. Umusaruro winganda nugukora alkali selulose hamwe na etherification agent: hydroxyethyl selulose ifite agaciro gakomeye ko gusimburwa irashonga mumazi akonje namazi ashyushye. Hydroxypropyl selulose ifite agaciro gakomeye ko gusimburwa irashobora gushonga gusa mumazi akonje ariko ntabwo ari mumazi ashyushye. Hydroxyethyl selulose irashobora gukoreshwa nkibyimbye byo gutwikira latx, gucapa imyenda no gusiga irangi, ibikoresho bipima impapuro, ibifatika hamwe na colloide ikingira. Gukoresha hydroxypropyl selulose isa niyya hydroxyethyl selulose. Hydroxypropyl selile ifite agaciro gake gasimburwa irashobora gukoreshwa nkibikoresho bya farumasi, bishobora kugira ibintu byombi bihuza kandi bigasenyuka.
Carboxymethylcellulose, mu magambo ahinnye nkaCMC, muri rusange ibaho muburyo bwumunyu wa sodium. Umuti wa etherifying ni acide monochloroacetic, kandi reaction niyi ikurikira:
Carboxymethyl selulose niyo ikoreshwa cyane mumazi ya elegitoronike ya selile. Mu bihe byashize, yakoreshwaga cyane cyane mu gucukura ibyondo, ariko ubu yongerewe kugira ngo ikoreshwe nk'inyongeramusaruro, imyenda yo kwambara, irangi rya latex, gutwikisha amakarito n'impapuro, n'ibindi.
Polyanionic selile (PAC) ni ionicselile etherkandi ni ibicuruzwa byo mu rwego rwo hejuru bisimbuza carboxymethyl selulose (CMC). Ni ifu yera, idafite umweru cyangwa ifu yumuhondo cyangwa granule, idafite uburozi, uburyohe, bworoshye gushonga mumazi, ikora igisubizo kiboneye hamwe nubukonje runaka, gifite imbaraga zo kurwanya ubushyuhe hamwe no kurwanya umunyu, hamwe na antibacterial ikomeye. Nta byoroheje no kwangirika. Ifite ibiranga isuku ryinshi, urwego rwo hejuru rwo gusimburwa, no gukwirakwiza kimwe kubisimbuza. Irashobora gukoreshwa nka binder, kubyimbye, guhindura imiterere ya rheologiya, kugabanya igihombo cyamazi, kugabanya stabilisateur, nibindi.
Cyanoethyl selulose nigicuruzwa cya selile na acrylonitrile munsi ya catalizike ya alkali:
Cyanoethyl selulose ifite dielectric ihoraho kandi coefficient de coiffure kandi irashobora gukoreshwa nka matrise ya resin ya fosifore n'amatara ya electroluminescent. Cyanoethyl selulose isimbuwe cyane irashobora gukoreshwa nkimpapuro zikingira impinduka.
Hateguwe amavuta menshi ya alcool, alkenyl ethers, na alomeri ya alcool ya selulose yateguwe, ariko ntabwo yakoreshejwe mubikorwa.
Uburyo bwo gutegura selile ya selile irashobora kugabanywa muburyo bwo hagati bwamazi, uburyo bwo gukemura, uburyo bwo guteka, uburyo bwo gutembagaza, uburyo bukomeye bwa gaz, uburyo bwa feri yo mumazi hamwe no guhuza uburyo bwavuzwe haruguru.
Igihe cyo kohereza: Apr-28-2024