Soo koobid:Si loogu beddelo khamriga polyvinyl-ka ee aan dumin karin (PVA), hemp stalk cellulose ether-hydroxypropyl methylcellulose ayaa laga diyaariyey caws hemp qashinka beeraha, oo lagu qaso istaarij gaar ah si loo diyaariyo slurry. Polyester-suufka dunta isku qasan ee T/C65/35 14.7 tex ayaa la cabiray waxaana la tijaabiyay cabirkeeda. Habka ugu wanaagsan ee wax soo saarka hydroxypropyl methylcellulose wuxuu ahaa sida soo socota: jajabka tirada badan ee lye wuxuu ahaa 35%; saamiga cadaadiska ee cellulose alkali wuxuu ahaa 2.4; Saamiga mugga dareeraha ee methane iyo propylene oxide waa 7: 3; lagu qaso isopropanol; Cadaadiska falcelinta waa 2 . 0MPa Cabbirka lagu diyaariyey isku dhafka hydroxypropyl methylcellulose iyo istaarij gaar ah ayaa leh COD hoose waana mid aad u saaxiibtinimo deegaanka, iyo dhammaan tilmaamayaasha cabbirka waxay bedeli karaan cabbirka PVA.
Erayada muhiimka ah:cawska hemp; hemp stem cellulose ether; khamriga polyvinyl; cabbirka cellulose ether
0.Hordhac
Shiinaha ayaa ka mid ah dalalka leh kheyraadka caws-cawska. Wax-soo-saarka dalagga ayaa ka badan 700 milyan oo tan, iyo heerka isticmaalka cawsku waa 3% oo keliya sannad kasta. Qadar badan oo kheyraadka cawska ah lagama faa'iidaysan. Cawsku waa maaddada ceyriinka ah ee dabiiciga ah ee hodanka ah, kaas oo loo isticmaali karo quudinta, bacriminta, derivatives cellulose iyo alaabta kale.
Waqtigan xaadirka ah, xaalufinta wasakheynta biyaha wasakhda ah ee habka wax soo saarka duntu waxay noqotay mid ka mid ah ilaha wasakhda ugu weyn. Baahida oksijiinta kiimikaad ee PVA waa mid aad u sareysa. Ka dib markii biyaha wasakhda ah ee warshadaha ee ay soo saarto PVA ee habka daabacaadda iyo rinjiyeynta lagu sii daayo webiga, waxay joojin doontaa ama xitaa baabi'in doontaa neefsiga noolaha biyaha. Intaa waxaa dheer, PVA waxay sii xumeyneysaa sii deynta iyo guuritaanka biraha culus ee ku jira qulqulka biyaha, taasoo keenta dhibaatooyin halis ah oo deegaanka ah. Si loo sameeyo cilmi-baaris ku saabsan beddelaadda PVA ee cagaarka cagaaran, waa lagama maarmaan ma aha oo kaliya in la buuxiyo shuruudaha habka cabbirka, laakiin sidoo kale in la yareeyo wasakhowga biyaha iyo hawada inta lagu jiro habka cabbirka.
Daraasaddan, hemp stalk cellulose ether-hydroxypropyl methylcellulose (HPMC) ayaa laga diyaariyey caws hemp qashinka beeraha, iyo habka wax soo saarka ayaa laga hadlay. Isku qas hydroxypropyl methylcellulose iyo cabbirka istaarijka gaarka ah sida cabbirka cabbirka, barbar dhig cabbirka PVA, oo ka hadal waxqabadkeeda cabbiridda.
1. Tijaabi
11 . 1 Qalabka iyo qalabka
Hemp, Heilongjiang; polyester-suuf isku qasan T/C65/3514.7 tex; hemp is-dhigay cellulose ether-hydroxypropyl methylcellulose; FS-101, istaarijka wax laga beddelay, PVA-1799, PVA-0588, Liaoning Zhongze Group Chaoyang Textile Co., Ltd.; propanol, heerka sare; propylene oxide, glacial acetic acid, sodium hydroxide, isopropanol, analytically saafi ah; methyl chloride, nitrogen-nadiifinta sare.
Qalabka falcelinta GSH-3L, JRA-6 muuqaal dhijitaal ah oo walaaqaya biyaha qubeyska, DHG-9079A kuleylka korantada heerkulka joogtada ah foornada qalajinta, IKARW-20 kicinta farsamada sare, ESS-1000 muunada mashiinka cabbirka, YG 061 / PC elektarooniga hal mitir xoogga mitirka, LFY-109B Tijaabada xoqida dunta kumbiyuutarka lagu sameeyay.
1.2 Diyaarinta hydroxypropyl methylcellulose
1. 2. 1 Diyaarinta fiber alkali ah
Kala qaybso jirida hemp, ku burburi 20 meshes oo leh burjiye, ku dar budada cawska hemp 35% xal aqueous NaOH, oo ku qooy heerkulka qolka 1 . 5 ~ 2 . 0 h. Tuuji fiilada alkali ee aan uurka lahayn si saamiga tirada alkali, cellulose, iyo biyaha uu yahay 1. 2: 1. 2:1.
1. 2. 2 falcelinta Etherification
Ku tuur cellulose alkali diyaarsan oo ku rid kiliyaha falcelinta, ku dar 100 mL oo isopropanol ah sida dareere ah, ku dar dareere 140 ml methyl chloride iyo 60 ml propylene oxide, faakiy, oo cadaadi 2. 0 MPa, si tartiib ah kor ugu qaad heerkulka ilaa 45 ° C 1-2 saacadood, oo ka falcelisa 75 ° C 1-2 saacadood si aad u diyaariso hydroxypropyl methylcellulose.
1. 2. 3 Processing ka dib
Ku hagaaji pH etherka cellulose etherified leh acetic acid glacial ilaa 6. 5 ~ 7 5, lagu dhaqo propanol saddex jeer, oo lagu qalajiyey foornada 85 ° C.
1.3 Habka wax soo saarka ee hydroxypropyl methylcellulose
1. 3. 1 Saamaynta xawaaraha wareega ee diyaarinta eter cellulose
Caadiyan falcelinta etherification waa falcelin kala duwan oo ka yimaada gudaha ilaa gudaha. Haddii aysan jirin awood dibadda ah, way ku adag tahay wakiilka etherification si uu u galo crystallization of cellulose, sidaas darteed waa lagama maarmaan in si buuxda loo isku daro wakiilka etherification leh cellulose iyada oo la adeegsanayo walaaq. Daraasaddan, reactor-ka-kicinta cadaadiska sare ayaa la isticmaalay. Tijaabooyin soo noqnoqda iyo bandhigyo ka dib, xawaaraha wareeg ee la doortay wuxuu ahaa 240-350 r/min.
1. 3. 2 Saamaynta fiirsashada alkali ee diyaarinta eter cellulose
Alkali wuxuu burburin karaa qaabdhismeedka is haysta ee cellulose si uu uga dhigo barar, iyo marka bararka gobolka amorphous iyo gobolka crystalline ay u muuqdaan inay noqdaan kuwo joogto ah, etherification ayaa si habsami leh u socota. Habka wax soo saarka ee ether cellulose, qadarka alkali ee loo isticmaalo habka alkalization cellulose ayaa saameyn weyn ku leh waxtarka etherification ee alaabta etherification iyo heerka beddelka kooxaha. Habka diyaarinta ee hydroxypropyl methylcellulose, sida xoojinta lye kordho, content ee kooxaha metoxyl ayaa sidoo kale kordhiya; Taa beddelkeeda, marka fiirsashada lye hoos u dhacdo, hydroxypropyl methylcellulose Maaddadu waa weyn tahay. Maaddada kooxda methoxy waxay si toos ah u dhigantaa fiirsashada lye; Maaddada hydroxypropyl waxay si liddi ku ah u dhigantaa fiirsashada lye. Tirada tirada guud ee NaOH waxaa loo doortay 35% ka dib baaritaanno soo noqnoqday.
1. 3. 3 Saamaynta saamiga alkali cellulose cadaadiska ee diyaarinta ether cellulose
Ujeedada cadaadiska alkali fiber waa in la xakameeyo waxa ku jira biyaha ee cellulose alkali. Marka saamiga cadaadisku uu aad u yar yahay, maadada biyuhu way korodhaa, xoojinta leydhka ayaa hoos u dhacaya, heerka etherification ayaa hoos u dhacaya, wakiilka etherification waa hydrolyzed iyo falcelinta dhinaca ayaa kordheysa. , waxtarka etherification si weyn ayaa loo dhimay. Marka saamiga cadaadisku uu aad u weyn yahay, biyaha ayaa hoos u dhacaya, cellulose lama barari karo, mana laha fal-celin, iyo wakiilka etherification si buuxda ulama xiriiri karo cellulose alkali, falcelintuna waa mid aan sinnayn. Tijaabooyin badan iyo isbarbardhig cadaadis ah ka dib, waxaa la go'aamiyay in saamiga ballaaran ee alkali, biyaha iyo cellulose uu ahaa 1. 2: 1. 2:1.
1. 3. 4 Saamaynta heerkulka ku saabsan diyaarinta eter cellulose
Inta lagu jiro diyaarinta hydroxypropyl methylcellulose, marka hore xakamee heerkulka 50-60 °C oo ku hay heerkul joogto ah 2 saacadood. Dareen-celinta hydroxypropylation waxaa la samayn karaa qiyaastii 30 ℃, iyo heerka falcelinta hydroxypropylation wuxuu aad u korayaa 50 ℃; si tartiib ah kor ugu qaad heerkulka ilaa 75 ℃, oo xakamee heerkulka ilaa 2 saacadood. Marka la joogo 50°C, falcelinta methylation-ka ayaa si dhib leh uga falcelinaysa, 60°C, heerka falcelintu waa gaabis, iyo 75°C, heerka falcelinta methylation-ka ayaa si weyn loo dardargeliyay.
Diyaarinta hydroxypropyl methylcellulose oo leh xakameyn heerkul badan oo heerkul ah ma xakameyn karto oo kaliya dheelitirka methyl iyo hydroxypropyl, laakiin sidoo kale waxay gacan ka geysaneysaa yareynta falcelinta dhinaca iyo daaweynta ka dib, iyo helitaanka alaabooyin leh qaab-dhismeed macquul ah.
1. 3. 5 Saamaynta saamiga wakiilka etherification ee diyaarinta etherka cellulose
Maaddaama hydroxypropyl methylcellulose uu yahay ether-ka isku dhafan ee caadiga ah ee aan-ionic ahayn, kooxaha methyl iyo hydroxypropyl waxaa lagu beddelaa silsiladaha macromolecular ee kala duwan ee hydroxypropyl methylcellulose, taas oo ah, kala duwan C ee boos kasta oo gulukoos ah. Dhanka kale, saamiga qaybinta methyl iyo hydroxypropyl ayaa leh kala firdhisanaan iyo randomity weyn. milanka biyaha ee HPMC waxay la xidhiidhaa waxa ku jira kooxda methoxy. Marka waxa ku jira kooxda methoxy ay hooseyso, waxaa lagu milmi karaa alkali xooggan. Marka maadada methoxyl ay korodho, waxay noqotaa mid aad u nugul bararka biyaha. Mar kasta oo maadada methoxy-ka ay sare u kacdo, ayaa si fiican u milmi kara biyaha, waxaana loo qaabayn karaa slurry.
Qadarka wakiilka etherifying methyl chloride iyo propylene oxide ayaa saameyn toos ah ku leh waxa ku jira metoxyl iyo hydroxypropyl. Si loogu diyaariyo hydroxypropyl methylcellulose leh milmi biyo wanaagsan, saamiga dareeraha ee methyl chloride iyo propylene oxide ayaa loo doortay sida 7: 3.
1.3.6 Habka wax soo saarka ugu fiican ee hydroxypropyl methylcellulose
Qalabka falcelintu waa reactor-ka-karka-sare ee cadaadiska; xawaaraha wareeggu waa 240-350 r / min; tirada guud ee lye waa 35%; saamiga cadaadiska ee cellulose alkali waa 2. 4; Hydroxypropoxylation at 50 ° C 2 saacadood, methoxylation at 75 ° C 2 saacadood; Wakiilka etherification methyl chloride iyo propylene oxide saamiga dareeraha dareeraha 7: 3; faaruq; cadaadis 2 . 0 MPa; dareeraha waa isopropanol.
2. Ogaanshaha iyo codsiga
2.1 SEM ee hemp cellulose iyo alkali cellulose
Marka la barbardhigo unugyada hemp cellulose ee aan la daweyn iyo hemp cellulose ee lagu daaweeyay 35% NaOH, waxaa si cad loo ogaan karaa in cellulose-ka alkalized uu leeyahay dildilaacyo badan oo dusha sare ah, aag weyn oo dusha sare ah, firfircooni sare iyo falcelinta etherification fudud.
2.2 Go'aaminta Spectroscopy Infrared
Cellulose-ka laga soo saaray caws hemp daawaynta ka dib iyo spectrum infrared ee HPMC oo laga diyaariyey cellulose geed hemp ah. Waxaa ka mid ah, band nuugista xooggan iyo ballaaran ee 3295 cm -1 waa band nuugista gariir fidsan ee kooxda HPMC ururka hydroxyl, band nuugista ee 1250 ~ 1460 cm -1 waa qaybta nuugista ee CH, CH2 iyo CH3, iyo nuugista band at 1600 cm -1 waa band nuugista ee biyaha ee band nuugista polymer. Qeybta nuugista ee 1025cm -1 waa qaybta nuugista ee C - O - C ee polymerka.
2.3 Go'aaminta viscosity
Qaado muunadda ether-ka ee xashiishka loo diyaariyey oo ku dar digsi si aad u diyaarisid 2% xal aqueous ah, si fiican u walaaq, ku cabbir viscosity-keeda iyo xasilloonida viscosity iyada oo leh viskometer, oo cabbir celceliska viscosity 3 jeer. Viscosity of xashiishadda diyaarsan ee stalk cellulose ether muunad ahaa 11. 8 mPa·s.
2.4 Codsiga cabbirka
2.4.1 qaabeynta slurry
Soodhaha waxaa lagu diyaariyey 1000mL oo dareere ah oo leh jajab tiro badan oo ah 3.5%, si siman loogu walaaqay qase, ka dibna la dhigo biyaha qubeyska oo lagu kululeeyo 95 ° C 1 saac. Isla mar ahaantaana, ogow in weelka wax lagu kariyo saxarka si fiican loo xidho si looga hortago in uumi-baxa biyuhu kordho.
2.4.2 Samaynta slurry pH, miscibility iyo COD
Isku qas hydroxypropyl methyl cellulose iyo cabbirka istaarijka gaarka ah si aad u diyaariso slurry (1#~4#), oo barbar dhig slurry formula PVA (0#) si loo falanqeeyo pH, miscibility iyo COD. Mashiinka suufka isku dhafan ee polyester-ka ah ee T/C65/3514.7 ayaa lagu cabiray mashiinka cabbiraadda muunad ee ESS1000, iyo waxqabadkeeda cabbirka ayaa la falanqeeyay.
Waxaa la arki karaa in hemp-ga guriga lagu sameeyo ee cellulose ether iyo cabbirka istaarijka gaarka ah 3 # ay yihiin qaabeynta cabbirka ugu habboon: 25% hemp stalk cellulose ether, 65% istaarijka la beddelay iyo 10% FS-101.
Dhammaan xogta qiyaasta waxay la mid tahay xogta cabbirka ee cabbirka PVA, taas oo muujinaysa in cabbirka isku dhafan ee hydroxypropyl methylcellulose iyo istaarijka gaarka ah uu leeyahay waxqabadka cabbirka wanaagsan; pH-keedu wuxuu ku dhow yahay dhexdhexaad; hydroxypropyl methylcellulose iyo istaarij gaar ah COD (17459.2 mg/L) ee cabbirka istaarijka gaarka ah ee isku dhafka ah ayaa aad uga hooseeya kan cabbirka PVA (26448.0 mg/L), iyo waxqabadka ilaalinta deegaanka ayaa ahaa mid wanaagsan.
3. Gabagabo
Habka wax soo saarka ugu fiican ee loogu talagalay diyaarinta hemp stalk cellulose ether-hydroxypropyl methylcellulose ee cabbirka waa sida soo socota: fal-celin cadaadis-sare leh oo leh xawaare wareeg ah 240-350 r / min, jajab ballaaran oo lye ah 35%, iyo saamiga cadaadiska of cellulose alkali 2.4, heerkulka methylation waa 75 ℃, iyo heerkulka hydroxypropylation waa 50 ℃, mid kasta oo lagu hayo 2 saacadood, ratio mugga dareere ah methyl chloride iyo propylene oxide waa 7: 3, vacuum, cadaadiska falcelinta waa 2.0 MPa. isopropanol waa dareeraha.
Hemp stem cellulose ether ayaa loo isticmaalay in lagu beddelo cabbirka PVA ee cabbirka, iyo cabbirka cabbirka ugu habboon wuxuu ahaa: 25% hemp stem cellulose ether, 65% istaarijka la beddelay iyo 10% FS-101. pH ee slurry waa 6.5 iyo COD (17459.2 mg / L) aad ayuu uga hooseeyaa kan slurry PVA (26448.0 mg / L), oo muujinaya waxqabadka deegaanka ee wanaagsan.
Hemp stalk cellulose ether ayaa loo isticmaalay cabbirka halkii cabbirka PVA si loo cabbiro suufka isku qasan ee polyester-ka T/C 65/3514.7tex. Tusmada cabbirku waa u dhigma. Hemp cusub ee jirida cellulose ether iyo istaarijka la bedelay ee cabbirka isku dhafan ayaa bedeli kara cabbirka PVA.
Waqtiga boostada: Febraayo-20-2023