Cellulose Ether munganda zimpapuro

Uru rupapuro rugaragaza ubwoko, uburyo bwo gutegura, ibiranga imikorere nuburyo bukoreshwa bwa selile ya selile mu nganda zikora impapuro, igashyira imbere ubwoko bushya bwa ethers ya selile ifite ibyerekezo byiterambere, ikanaganira kubikoreshwa hamwe niterambere ryogukora impapuro.

Amagambo y'ingenzi:selile ether; imikorere; inganda

Cellulose ni polymer karemano, imiterere yimiti ni polysaccharide macromolecule hamwe na anhydrousβ-glucose nkimpeta shingiro, kandi buri mpeta yibanze ifite hydroxyl yibanze hamwe nitsinda rya kabiri rya hydroxyl. Binyuze mu guhindura imiti, urukurikirane rw'ibikomoka kuri selile birashobora kuboneka. Uburyo bwo gutegura ether ya selile ni ugukora selile hamwe na NaOH, hanyuma ugakora reaction ya etherification hamwe nibikorwa bitandukanye nka methyl chloride, okiside ya Ethylene, okiside ya propylene, nibindi, hanyuma ukaraba umunyu wibicuruzwa hamwe na sodium ya selile kugirango ubone. ibicuruzwa. Ether ya selile ni imwe mu nkomoko zikomeye za selile, zishobora gukoreshwa cyane mu buvuzi n’isuku, inganda z’imiti ya buri munsi, gukora impapuro, ibiryo, ubuvuzi, ubwubatsi, ibikoresho n’inganda. Mu myaka yashize, ibihugu by’amahanga byahaye agaciro gakomeye ubushakashatsi bwabyo, kandi hari byinshi bimaze kugerwaho mu bushakashatsi bwibanze, gushyira mu bikorwa ingaruka zifatika, no gutegura. Mu myaka yashize, abantu bamwe mubushinwa batangiye kwishora mubushakashatsi kuriyi ngingo, kandi babanje kugera kubisubizo mubikorwa byumusaruro. Kubwibyo, iterambere no gukoresha selile ya selile bigira uruhare runini mugukoresha byimazeyo umutungo w’ibinyabuzima ushobora kuvugururwa no kuzamura ubwiza bwimpapuro n'imikorere. Nubwoko bushya bwo kongeramo impapuro zikwiye gutera imbere.

1. Gutondekanya no gutegura uburyo bwa selile ethers

Ibyiciro bya selile ya selile bigabanijwemo ibyiciro 4 ukurikije ionicity.

1.1 Nonionic Cellulose Ether

Ether idafite ionic selulose ether ni selile ya alkyl ether, kandi uburyo bwayo bwo kuyitegura ni ugukora selile hamwe na NaOH, hanyuma ugakora etherification reaction hamwe na monomor zitandukanye zikora nka monochloromethane, okiside ya Ethylene, okiside ya propylene, nibindi, hanyuma bikaboneka mugukaraba. umunyu ukomoka ku bicuruzwa na sodium ya selile, cyane cyane harimo methyl selileulose ether, methyl hydroxyethyl selulose ether, methyl hydroxypropyl selulose ether, hydroxyethyl selulose ether, cyanoethyl Cellulose ether na hydroxybutyl selulose ether ikoreshwa cyane.

1.2 Anionic selulose ether

Anionic selulose ethers ni sodium carboxymethyl selulose na sodium carboxymethyl hydroxyethyl selulose. Uburyo bwo gutegura ni ugukora selile hamwe na NaOH hanyuma ugakora ether hamwe na acide chloroacetic, okiside ya Ethylene na okiside ya propylene. Imiti ya reaction, hanyuma ikaboneka mugukaraba umunyu-bicuruzwa na sodium selulose.

1.3 Cateric Cellulose Ether

Cationic ethers ya selile ahanini irimo 3-chloro-2-hydroxypropyltrimethylammonium chloride selulose ether, itegurwa no gukora selile hamwe na NaOH hanyuma ikagira icyo ikora hamwe na cationic etherifying agent 3-chloro-2-hydroxypropyl Trimethyl ammonium chloride cyangwa etylene oxyde na etylene oxyde hanyuma ukaboneka ukaraba umunyu-bicuruzwa na sodium selulose.

1.4 Zwitterionic Cellulose Ether

Urunigi rwa molekuline ya zwitterionic selulose ether ifite amatsinda ya anionic hamwe nitsinda rya cationic. Uburyo bwayo bwo kuyitegura ni ugukora selile hamwe na NaOH hanyuma ukitwara hamwe na acide monochloroacetic hamwe na cationic etherification agent 3-chloro-2-hydroxypropyl Trimethylammonium chloride ya etherifike, hanyuma ikaboneka mukwoza umunyu ukomoka kuri salide na sodium selulose.

2. Imikorere nibiranga selile ether

2.1 Gukora firime no gufatira hamwe

Etherifike ya selile ya selile igira uruhare runini mubiranga n'imiterere yayo, nko gukomera, ubushobozi bwo gukora firime, imbaraga zumubano no kurwanya umunyu. Cellulose ether ifite imbaraga zubukanishi, guhindagurika, kurwanya ubushyuhe no kurwanya ubukonje, kandi ifite aho ihurira neza na resin zitandukanye hamwe na plasitike, kandi irashobora gukoreshwa mugukora plastiki, firime, langi, ibifunga, latex nibikoresho byo gutwikira ibiyobyabwenge, nibindi.

2.2 Gukemura

Cellulose ether ifite amazi meza yo gukemura bitewe nuko habaho amatsinda ya polyhydroxyl, kandi afite uburyo butandukanye bwo guhitamo imiti ikomoka kumashanyarazi ukurikije insimburangingo zitandukanye. Methylcellulose irashobora gushonga mumazi akonje, ntigashonga mumazi ashyushye, kandi ikanashonga mumashanyarazi amwe; methyl hydroxyethyl selulose irashonga mumazi akonje, ntigashonga mumazi ashyushye hamwe na solge organic. Ariko, mugihe igisubizo cyamazi ya methylcellulose na methylhydroxyethylcellulose gishyushye, methylcellulose na methylhydroxyethylcellulose bizagwa. Methyl selulose igwa kuri 45-60°C, mugihe ubushyuhe bwimvura ya methyl hydroxyethyl selulose ivanze ya etherifile yiyongereye kugera kuri 65-80°C. Iyo ubushyuhe bumaze kugabanuka, imvura igabanuka. Hydroxyethylcellulose na sodium carboxymethylcellulose zishonga mumazi mubushyuhe ubwo aribwo bwose kandi ntizishonga mumashanyarazi (usibye bake). Ukoresheje uyu mutungo, imiti itandukanye yamavuta hamwe nibikoresho bya firime byoroshye birashobora gutegurwa.

2.3 Kubyimba

Ether ya selulose ishonga mumazi muburyo bwa colloid, ubukonje bwayo buterwa nurwego rwa polymerisation ya selile ya selile, kandi igisubizo kirimo macromolecules. Bitewe no kwangirika kwa macromolecules, imyitwarire yimikorere yibisubizo itandukanye niy'amazi ya Newtonian, ariko agaragaza imyitwarire ihinduka hamwe nimbaraga zogosha. Bitewe na macromolecular ya selulose ether, ubwiza bwumuti bwiyongera byihuse hamwe no kwiyongera kwinshi kandi bigabanuka vuba hamwe nubushyuhe bwiyongera. Ukurikije ibiyiranga, ethers ya selile nka carboxymethyl selulose na hydroxyethyl selulose irashobora gukoreshwa nkibyimbye kumiti ya buri munsi, imiti igumana amazi yo gutwikira impapuro, hamwe nububyimbye bwububiko.

2.4 Gutesha agaciro

Iyo selile ya selile imaze gushonga mugice cyamazi, bagiteri zizakura, kandi gukura kwa bagiteri bizatuma habaho bacteri za enzyme. Enzyme isenya anhydroglucose yingingo zidafite aho zihurira na selile ya selile, bikagabanya uburemere bugereranije bwa polymer. Kubwibyo, niba igisubizo cyamazi ya selulose ether igomba kubikwa igihe kirekire, imiti igabanya ubukana igomba kongerwamo, kandi hagomba gufatwa ingamba zimwe na zimwe zo kurwanya antiseptike ndetse no kuri ether ya selile ifite antibacterial.

3. Gukoresha selile ether mu nganda zimpapuro

3.1 Umukozi ukomeza impapuro

Kurugero, CMC irashobora gukoreshwa nka fibre ikwirakwiza fibre hamwe nimpapuro zishimangira impapuro, zishobora kongerwa kuri pulp. Kubera ko sodium carboxymethyl selulose ifite charge zingana na pulp nuduce twuzuye, irashobora kongera uburinganire bwa fibre. Ingaruka yo guhuza fibre irashobora kunozwa, kandi ibipimo bifatika nkimbaraga zingana, imbaraga ziturika, nimpapuro zingana nimpapuro zirashobora kunozwa. Kurugero, Longzhu nabandi bakoresha 100% byumye ya sulfite yimbaho, ifu ya talcum 20%, 1% ikwirakwiza kole ya rosin, ihindura agaciro ka pH kuri 4.5 hamwe na sulfate ya aluminium, hanyuma ukoreshe viscosity CMC (viscosity 800 ~ 1200MPA.S) Impamyabumenyi yo gusimburwa ni 0.6. Birashobora kugaragara ko CMC ishobora kunoza imbaraga zumye zimpapuro kandi ikanatezimbere ubunini bwayo.

3.2 Ubunini buringaniye

Sodium carboxymethyl selulose irashobora gukoreshwa nkimpapuro zingana zingana kugirango zongere imbaraga zimpapuro. Ingaruka zikoreshwa zirashobora kongera imbaraga zubuso hafi 10% ugereranije nubu ikoreshwa rya alcool ya polyvinyl hamwe nubunini bwahinduwe bwa krahisi, kandi dosiye irashobora kugabanukaho 30%. Nibintu bitanga icyizere cyo gupima impapuro, kandi uruhererekane rwubwoko bushya bugomba gutezwa imbere. Cationic selulose ether ifite ubunini buringaniye buringaniye kuruta ibinyamisogwe. Ntishobora kunoza imbaraga zubuso bwimpapuro gusa, ariko kandi irashobora kunoza imikorere yo kwinjiza wino yimpapuro no kongera ingaruka zo gusiga. Nubundi buryo butanga ikizere cyo hejuru. Mo Lihuan n'abandi bakoresheje sodium carboxymethyl selulose hamwe na krahide ya okiside kugirango bakore ibizamini bingana ku mpapuro no mu ikarito. Ibisubizo byerekana ko CMC ifite ingaruka nziza yo kugereranya.

Methyl carboxymethyl selulose sodium ifite imikorere ingana, kandi sodium ya carboxymethyl selulose irashobora gukoreshwa nkibikoresho bya pulp. Usibye impamyabumenyi yacyo, cationic selulose ether irashobora kandi gukoreshwa nkimfashanyo yo kubika impapuro zo kuyungurura Filter, kunoza igipimo cyo kugumana fibre nziza nuwuzuza, kandi irashobora no gukoreshwa nkumukozi ukomeza impapuro.

3.3

Ether ya selile ikoreshwa cyane mugutegura emulsiyo kubera ingaruka nziza zayo zibyibushye mugisubizo cyamazi, zishobora kongera ubukana bwikwirakwizwa rya emulsiyo kandi ikarinda imvura igwa no gutondeka. Nka sodium carboxymethyl selulose, hydroxyethyl selulose ether, hydroxypropyl selulose ether, nibindi birashobora gukoreshwa nka stabilisateur hamwe nuburinzi bwa anionic yatatanye rosin gum, cationic selulose ether, hydroxyethyl selulose ether, hydroxypropyl selulose ether, nibindi. ether, nibindi birashobora kandi gukoreshwa nkibikoresho byo gukingira cationic disperse rosin gum, AKD, ASA nibindi bikoresho bingana. Longzhu n'abandi. yakoresheje 100% yanduye ibiti bya sulfite, ifu ya talcum 20%, 1% ikwirakwiza kole ya rosin, ihindura agaciro ka pH igera kuri 4.5 hamwe na sulfate ya aluminium, kandi ikoresha CMC (viscosity 800 ~ 12000MPA.S). Urwego rwo gusimbuza ni 0,6, kandi rukoreshwa mubunini bwimbere. Birashobora kugaragara mubisubizo ko ingano yubunini bwa reberi ya rosin irimo CMC bigaragara ko yateye imbere, kandi ituze rya emulioni ya rosin ni ryiza, kandi igipimo cyo kugumana ibikoresho bya reberi nacyo kiri hejuru.

3.4 Igikoresho cyo kubika amazi

Ikoreshwa mugutwikira no gutunganya impapuro zifunga impapuro, cyanoethyl selulose, hydroxyethyl selulose, nibindi birashobora gusimbuza casein hamwe nigice cya latex, kugirango wino yo gucapa ishobora kwinjira byoroshye kandi impande ziragaragara. Carboxymethyl selulose na hydroxyethyl carboxymethyl selulose ether irashobora gukoreshwa nkikwirakwiza pigment, ikabyimbye, igumana amazi na stabilisateur. Kurugero, ingano ya carboxymethyl selulose ikoreshwa nkibikoresho bigumana amazi mugutegura impapuro zometseho ni 1-2%.

4. Iterambere ryiterambere rya Cellulose Ether ikoreshwa munganda zimpapuro

Gukoresha imiti ihindura imiti kugirango ibone ibikomoka kuri selile bifite imirimo yihariye nuburyo bwiza bwo gushakisha uburyo bushya bwo gukoresha umusaruro mwinshi ku isi w’ibinyabuzima kama-selile. Hariho ubwoko bwinshi bwibikomoka kuri selile nibikorwa binini, kandi ether ya selile yakoreshejwe mubikorwa byinshi kubera imikorere myiza. Kugirango uhuze ibyifuzo byinganda zimpapuro, iterambere rya selile ether igomba kwitondera inzira zikurikira:

.

. nibindi bisa nkuguhuza.

(3) Shimangira ubushakashatsi kubikorwa byo gutegura selile ya selile nuburyo bushya bwo gutegura, cyane cyane ubushakashatsi bwo kugabanya ibiciro no koroshya inzira.

.