Focus on Cellulose ethers

Gutegura ikinyamisogwe cya stul selile selile ether nubunini bwayo mubunini

Ibisobanuro:Mu rwego rwo gusimbuza inzoga za polyvinyl zidashobora kwangirika (PVA), hamp stalk selulose ether-hydroxypropyl methylcellulose yateguwe kuva mumyanda y’ubuhinzi y’ubuhinzi, hanyuma ivangwa na krahisi yihariye kugirango itegure ibishishwa. Polyester-ipamba ivanze yintambara T / C65 / 35 14.7 tex yari ifite ubunini kandi igipimo cyayo cyageragejwe. Uburyo bwiza bwo gukora hydroxypropyl methylcellulose bwari bukurikira: igice kinini cya lye cyari 35%; igipimo cyo kwikuramo selile ya alkali yari 2.4; Umubare w'amazi ya metani na okiside ya propylene ni 7: 3; kuvanga na isopropanol; igitutu cya reaction ni 2. 0MPa. Ingano yateguwe no kuvanga hydroxypropyl methylcellulose hamwe na krahisi yihariye ifite COD yo hasi kandi ikangiza ibidukikije, kandi ibipimo byose byerekana ubunini bishobora gusimbuza ubunini bwa PVA.

Amagambo y'ingenzi:ikibabi; hemp stalk selulose ether; inzoga ya polyvinyl; ingirabuzimafatizo

0.Ijambo ry'ibanze

Ubushinwa ni kimwe mu bihugu bifite umutungo ukungahaye cyane. Umusaruro wibihingwa urenga toni miliyoni 700, kandi igipimo cyo gukoresha ibyatsi ni 3% gusa buri mwaka. Umubare munini wibikoresho byibyatsi ntabwo byakoreshejwe. Ibyatsi nibintu bisanzwe bya lignocellulosique mbisi, bishobora gukoreshwa mubiryo, ifumbire, ibikomoka kuri selile nibindi bicuruzwa.

Kugeza ubu, gusuzugura umwanda w’amazi mu bikorwa by’imyenda byabaye imwe mu masoko manini yanduye. Imiti ya ogisijeni ikenerwa na PVA ni myinshi cyane. Amazi mabi yinganda yakozwe na PVA mugikorwa cyo gucapa no gusiga irangi mu ruzi, bizabuza cyangwa byangiza imyuka y’ibinyabuzima byo mu mazi. Byongeye kandi, PVA yongerera kurekura no kwimuka kwibyuma biremereye mubutaka bwamazi, bigatera ibibazo bikomeye byibidukikije. Kugirango ukore ubushakashatsi ku gusimbuza PVA icyatsi kibisi, ntibikenewe gusa kubahiriza ibisabwa murwego rwo kugereranya, ahubwo ni ngombwa no kugabanya umwanda w’amazi n’ikirere mugihe cyo gupima.

Muri ubu bushakashatsi, hamp stalk selulose ether-hydroxypropyl methylcellulose (HPMC) yateguwe kuva mu gihingwa cy’imyanda y’ubuhinzi, hanaganirwaho uburyo bwo kuyibyaza umusaruro. Kandi uvange hydroxypropyl methylcellulose nubunini bwihariye bwa krahisi nkubunini bwo kugereranya, gereranya nubunini bwa PVA, hanyuma uganire kubikorwa byayo.

1. Ubushakashatsi

1. 1 Ibikoresho n'ibikoresho

Hemp stalk, Heilongjiang; polyester-ipamba ivanze umugozi T / C65 / 3514.7 inyandiko; yakozwe na hemp stalk selulose ether-hydroxypropyl methylcellulose; FS-101, yahinduwe ibinyamisogwe, PVA-1799, PVA-0588, Liaoning Zhongze Group Chaoyang Textile Co., Ltd.; propanol, icyiciro cyo hejuru; okiside ya propylene, acide glacial acetike, hydroxide ya sodium, isopropanol, isesenguye neza; methyl chloride, azote nziza cyane.

GSH-3L isafuriya, JRA-6 yerekana ibyuma bya digitale magnetique ikurura amazi yo koga, DHG-9079A gushyushya amashanyarazi guhora yumisha ubushyuhe bwumuriro, IKARW-20 hejuru yubukanishi bwimashini, imashini yerekana urugero rwa ESS-1000, YG 061 / PC ya elegitoronike yimbaraga imwe, LFY-109B igerageza mudasobwa yarn abrasion.

1.2 Gutegura hydroxypropyl methylcellulose

1. 2. Gutegura fibre ya alkali

Gabanya igishishwa cya herp, ujanjagure kuri meshes 20 hamwe na pulverizer, ongeramo ifu yikigina cya 35% yumuti wamazi wa NaOH, hanyuma uyishire mubushyuhe bwicyumba kuri 1. 5 ~ 2. 0 h. Gabanya fibre ya alkali yatewe kugirango igipimo rusange cya alkali, selile, namazi ari 1. 2: 1. 2: 1.

1.2

Fata alkali selile yateguwe mumasafuriya ya reaction, ongeramo 100 mL ya isopropanol nka diluent, ongeramo amazi 140 mL ya methyl chloride na 60 mL ya oxyde ya propylene, vacuumize, hanyuma ukande kuri 2. 0 MPa, uzamura buhoro buhoro ubushyuhe bugera kuri 45 ° C mumasaha 1-2, hanyuma ukore kuri 75 ° C mumasaha 1-2 kugirango utegure hydroxypropyl methylcellulose.

1. 3. Nyuma yo gutunganywa

Hindura pH ya etherified selileulose ether hamwe na acide glacial acetic acide kuri 6. 5 ~ 7. 5, gukaraba hamwe na propanol inshuro eshatu, hanyuma ukama mu ziko kuri 85 ° C.

1.3 Uburyo bwo kubyara hydroxypropyl methylcellulose

1. 3. Ingaruka yumuvuduko wo kuzunguruka mugutegura selile ya ether

Mubisanzwe reaction ya etherification nigikorwa cya heterogeneous reaction kuva imbere kugeza imbere. Niba nta mbaraga zituruka hanze, biragoye ko umukozi wa etherification yinjira muri kristu ya selile, birakenewe rero guhuza byimazeyo agent ya etherification na selile ukoresheje uburyo bwo gukurura. Muri ubu bushakashatsi, hakoreshejwe reaction yumuvuduko ukabije. Nyuma yubushakashatsi bwerekanwe, imyigaragambyo yatoranijwe yari 240-350 r / min.

1.2 Ingaruka zo kwibanda kuri alkali mugutegura selile ether

Alkali irashobora gusenya imiterere yimikorere ya selile kugirango ikabyimba, kandi mugihe kubyimba kwakarere ka amorphous nakarere ka kristalline bikunda kuba bihamye, etherifike igenda neza. Mubikorwa byo gukora ether ya selulose, ingano ya alkali ikoreshwa mugikorwa cya alkalisation ya selile igira uruhare runini mubikorwa bya etherification yibicuruzwa bya etherifasique hamwe nurwego rwo gusimbuza amatsinda. Muburyo bwo gutegura hydroxypropyl methylcellulose, uko kwibumbira hamwe kwa lye kwiyongera, ibikubiye mumatsinda ya mikoro nayo yiyongera; muburyo bunyuranye, iyo intumbero ya lye igabanutse, hydroxypropyl methylcellulose Ibirimo shingiro ni binini. Ibiri mumatsinda ya mikorerexy iragereranijwe neza na concentration ya lye; ibikubiye muri hydroxypropyl iringaniza muburyo bwa concentration ya lye. Igice kinini cya NaOH cyatoranijwe nka 35% nyuma yikizamini gisubirwamo.

1. 3. Ingaruka ya alkali selulose ikanda ku itegurwa rya selile

Intego yo gukanda fibre alkali ni ukugenzura amazi ya selile ya alkali. Iyo igipimo cyo gukanda ari gito cyane, amazi ariyongera, ubunini bwa lye buragabanuka, igipimo cya etherification kigabanuka, kandi na etherification agent iba hydrolyzed kandi reaction ziyongera. , imikorere ya etherification iragabanuka cyane. Iyo igipimo cyo gukanda ari kinini cyane, amazi aragabanuka, selile ntishobora kubyimba, kandi ntigire reaction, kandi agent ya etherification ntishobora guhura neza na selile ya alkali, kandi reaction ntisanzwe. Nyuma y ibizamini byinshi no kugereranya gukomeye, hemejwe ko igipimo rusange cya alkali, amazi na selile ari 1. 2: 1. 2: 1.

1. 3. Ingaruka yubushyuhe mugutegura selile

Muburyo bwo gutegura hydroxypropyl methylcellulose, banza ugenzure ubushyuhe kuri 50-60 ° C hanyuma ubigumane ubushyuhe buhoraho mumasaha 2. Hydroxypropylation reaction irashobora gukorwa nka 30 and, kandi igipimo cya hydroxypropylation cyiyongera cyane kuri 50 ℃; gahoro gahoro kuzamura ubushyuhe kuri 75 ℃, kandi ugenzure ubushyuhe bwamasaha 2. Kuri 50 ° C, methylation reaction ntishobora kubyitwaramo neza, kuri 60 ° C, igipimo cyibisubizo kiratinda, naho kuri 75 ° C, igipimo cya methylation cyihuta cyane.

Gutegura hydroxypropyl methylcellulose hamwe nubushyuhe bwo kugenzura ibyiciro byinshi ntibishobora gusa kugenzura uburinganire bwamatsinda ya metoxyl na hydroxypropyl, ariko kandi bifasha kugabanya ingaruka ziterwa na nyuma yubuvuzi, no kubona ibicuruzwa bifite imiterere ihamye.

1. Ingaruka za agent ya etherification igipimo cya dosiye mugutegura selile

Kubera ko hydroxypropyl methylcellulose ari ether isanzwe idafite ionic ivanze, methyl na hydroxypropyl matsinda asimbuzwa hydroxypropyl methylcellulose iminyururu ya macromolecular, ni ukuvuga C itandukanye muri buri mwanya wimpeta ya glucose. Kurundi ruhande, ikwirakwizwa rya methyl na hydroxypropyl rifite itandukaniro ryinshi kandi ridasanzwe. Amazi meza ya HPMC afitanye isano nibiri mumatsinda ya mikorerexy. Iyo ibikubiye mu matsinda mato ari bike, birashobora gushonga muri alkali ikomeye. Mugihe vitamine ikoreshwa, igenda irushaho kubyimba amazi. Iyo ibintu byinshi biri hejuru ya mikorobe, niko bigenda neza, kandi birashobora guhinduka muburyo bworoshye.

Ingano ya etherifying agent methyl chloride na okiside ya propylene igira ingaruka itaziguye kubiri muri vitamine na hydroxypropyl. Mu rwego rwo gutegura hydroxypropyl methylcellulose hamwe n’amazi meza yo gukemura, igipimo cy’amazi ya methyl chloride na oxyde ya propylene cyatoranijwe nka 7: 3.

1.3.6 Uburyo bwiza bwo gukora hydroxypropyl methylcellulose

Ibikoresho bya reaction ni reaction yumuvuduko ukabije; umuvuduko wo kuzunguruka ni 240-350 r / min; igice kinini cya lye ni 35%; igipimo cyo kugabanuka kwa alkali selile ni 2. 4; Hydroxypropoxylation kuri 50 ° C mu masaha 2, metoxylation kuri 75 ° C kumasaha 2; umukozi wa etherification methyl chloride na propylene oxyde igereranije ya 7: 3; icyuho; igitutu 2. 0 MPa; diluent ni isopropanol.

2. Kumenya no gusaba

2.1 SEM ya selile selile na alkali selile

Ugereranije na selelose itavuwe hamwe na selulose ya hemp ivurwa hamwe na 35% NaOH, urashobora kubona neza ko selile ya alkalize ifite ibice byinshi byo hejuru, ubuso bunini, ibikorwa byinshi kandi byoroshye na etherification.

2.2 Kumenyekanisha Infrared Spectroscopy

Cellulose yakuwe mu gihuru nyuma yo kuvurwa hamwe na infragre ya infragre ya HPMC yateguwe kuva hemp stalk selulose. Muri byo, umurongo ukomeye kandi wagutse kuri cm 3295 -1 ni umurongo urambuye wo kunyeganyega winjiza wa HPMC ishyirahamwe hydroxyl, itsinda ryinjira kuri cm 1250 ~ 1460 cm -1 nitsinda ryinjira rya CH, CH2 na CH3, hamwe no kwinjiza bande kuri 1600 cm -1 nitsinda ryamazi yo mumashanyarazi. Umuyoboro winjiza kuri 1025cm -1 niwo mugozi wa C - O - C muri polymer.

2.3 Kwiyemeza kwiyemeza

Fata urumogi rwateguwe rwitwa selulose ether ntangarugero hanyuma ubyongere kuri beaker kugirango utegure igisubizo cyamazi cya 2%, ubivange neza, upime ubwiza bwabyo hamwe nubukonje bwabyo hamwe na viscometer, hanyuma upime ubukonje buringaniye inshuro 3. Ubukonje bwurumogi rwateguwe rwitwa selulose ether sample yari 11. 8 mPa · s.

2.4

2.4.1 Iboneza ryihuse

Igishishwa cyateguwe muri 1000mL yigituba gifite igice kinini cya 3.5%, kivangwa neza hamwe na mixer, hanyuma gishyirwa mubwogero bwamazi hanyuma gishyuha kugeza kuri 95 ° C kuri 1 h. Muri icyo gihe, menya ko igikoni cyo guteka cya pulp kigomba gufungwa neza kugirango hirindwe ko ibishishwa byiyongera biturutse kumazi.

2.4.2 Guhindura buhoro pH, kwibeshya na COD

Kuvanga hydroxypropyl methyl selulose nubunini bwihariye bwa krahisi kugirango utegure ibishishwa (1 # ~ 4 #), hanyuma ugereranye na PVA formula ya slurry (0 #) kugirango usesengure pH, kwibeshya na COD. Polyester-ipamba ivanze yintambara T / C65 / 3514.7 tex yari ifite ubunini kuri mashini yerekana urugero rwa ESS1000, kandi isesengura ryakozwe.

Birashobora kugaragara ko urugo rwakozwe na hemp stalk selulose ether hamwe nubunini bwihariye bwa krahisi 3 # nuburyo bwiza bwo gukora: 25% ya hemp stalk selulose ether, 65% byahinduwe na 10% FS-101.

Ingano yamakuru yose igereranwa nubunini bwamakuru yubunini bwa PVA, byerekana ko ingano ivanze ya hydroxypropyl methylcellulose hamwe na krahisi yihariye ifite imikorere myiza yo gupima; pH yayo yegereye kutabogama; hydroxypropyl methylcellulose hamwe na krahisi yihariye COD (17459.2 mg / L) yubunini bwihariye bwa krahisi ivanze yari munsi cyane ugereranije nubunini bwa PVA (26448.0 mg / L), kandi imikorere yo kurengera ibidukikije yari nziza.

3. Umwanzuro

Uburyo bwiza bwo gutanga umusaruro mugutegura hemp stalk selulose ether-hydroxypropyl methylcellulose kugirango ingane niyi ikurikira: reaction yumuvuduko ukabije wumuvuduko ufite umuvuduko wa 240-350 r / min, igice kinini cya lye ya 35%, hamwe nikigereranyo cyo kwikuramo ya alkali selile 2.4, ubushyuhe bwa methylation ni 75 ℃, n'ubushyuhe bwa hydroxypropylation ni 50 ℃, buri kimwe kigakomeza amasaha 2, igipimo cy’amazi ya methyl chloride na okiside ya propylene ni 7: 3, vacuum, umuvuduko wa reaction ni 2.0 MPa, isopropanol ni diluent.

Hemp stalk selulose ether yakoreshejwe mugusimbuza ingano ya PVA kugirango ingane, kandi igipimo cyiza cyari: 25% ya hemp stalk selulose ether, 65% yahinduwe na 10% FS - 101. PH ya slurry ni 6.5 naho COD (17459.2 mg / L) iri hasi cyane ugereranije na PVA (26448.0 mg / L), yerekana imikorere myiza yibidukikije.

Hemp stalk selulose ether yakoreshejwe mugupima aho kuba PVA kugirango bapime polyester-ipamba ivanze yintambara T / C 65 / 3514.7tex. Ingano ingana irasa. Ibimera bishya bya selulose ether hamwe nubunini bwahinduwe bwa krahisi bishobora gusimbuza ubunini bwa PVA.


Igihe cyo kohereza: Gashyantare-20-2023
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